271 F14.2: every type-1 move of 0129's library (27,852), both orders, key lengths 1-26, then a table with two dictionary keyword alphabets (208,064 each, standard and KRYPTOS among them) and a repeating key word; K4 against 50 shuffles, plants 14 scheidt mask keyed by words
reverted
0/24
0 7.5 h unclocked 270 F6.1: one free alphabet after or before every type-1 move, key lengths 6-10, every setting K4 fits decided by D1's one-run decider, with 20 shuffled stand-ins through the same procedure 6 move then table
reverted
0/24
0 10.3 h unclocked 269 F1.14's gate: 0267's 24 plants (hand key schedules on two free alphabets) and 12 kept-place copies each, climbed ten times, power after r runs for r = 1-10 1 keyed periodic
reverted
0/24
0 42 min 268 F15.3: held-out drafts planted under two free alphabets at key lengths 13 and 20, each climbed with English alone and with English mixed with the drafts' quadgrams, against 12 kept-place copies climbed the same way 15 content from k1 k3
reverted
0/24
0 37 min Pivot P23: F1's cost-blocked residues (F1.4's two free alphabets) → F15 K1-K3 as a guide to K4's content (F15.1, the content model) 267 F1.4: every hand key schedule K4 fits on two free alphabets, each decided by D1b's four-run decider against kept-place copies one at a time, with 20 shuffled stand-ins through the same procedure 1 keyed periodic
reverted
0/24
0 8.9 h unclocked 266 F6.22c: K4's best forced period-23 AMSCO key against the best of 21 settings drawn from the shuffles' own (a count-matched null), and per setting 6 move then table
reverted
0/24
0 72 s unclocked 265 F6.22b, rerun: the keys K4's AMSCO settings force at period 23, scored by their English likelihood with gaps allowed, against the best forced key of each of 200 shuffles; 20 planted running-key messages 6 move then table
reverted
0/24
0 64 s unclocked 264 F6.22b: the keys K4's AMSCO settings force at period 23, read for English (quadgrams), against the best forced key of each of 200 shuffles; 20 planted running-key messages for power 6 move then table
reverted
0/24
0 64 s unclocked 263 F6.22: 0114's AMSCO excess at period 23 (K4 21 live settings against 1-15 on 10 shuffles): the same exact count against 200 fresh shuffles, and K4's live settings' forced keys checked against every 23-letter window of the named texts 6 move then table
reverted
0/24
0 2 min 262 F5.2: Gromark on a free mixed alphabet, the rules 0195 left for cost: three-term base 26 to lag 6, three-term lag 7 in bases 2-16, two-term base 26 lags 6-7, two-term lags 7-8 in bases 2-16, base 10 lags 9-10: exact 5 gromark lfsr
reverted
0/24
0 4.2 h unclocked 261 F1.12: F1.1 Beaufort 23 and 26 and F1.2 at 13, K4 against 100 of its own copies with the one-run decider, then MIX8m and the blind judge as second deciders 1 keyed periodic
reverted
0/24
0 13 min unclocked 260 F13.4i: what carries K4's B2 excess? K4's 96 cyclic rotations, its reversal and 300 block-shuffled versions through 0238's search, against 500 fresh shuffles; planted messages rotated the same way 13 ciphertext only
reverted
0/24
0 79 s unclocked 259 F13.4h: chase 0237-0239's replicated excess (the table, then a move, key length 2): 1,000 fresh shuffles; the move library split into width-19 reads and the rest; a period-2 statistic of the carved order under the flagged move; known letters counted after 13 ciphertext only
reverted
0/24
0 2 min unclocked 258 F13.4c at key lengths 6-19 (D3): one free alphabet with a periodic key, ciphertext only, K4 against 100 fresh shuffles climbed by 0236's frozen search, closed at the measured power 13 ciphertext only
reverted
88.6%
3/24
28 2.4 h unclocked Pivot P22: the cheaper decider (D2, D1b) and the cells it reopened in F1 → F13 ciphertext only (D3's F13.4c at 6-19, then F13.4h) 257 D1b: design 2's power per run for two free alphabets (Quagmire IV), 24 clean and 24 Sanborn-style plants at F1.2's sampled lengths 13 and 16, every run's best recorded 1 keyed periodic
reverted
0/24
0 65 min unclocked 256 F1.7 and D2: autokey on one free alphabet, every lag K4 fits (ciphertext and plaintext autokey, three forms), each decided by an alphabet climb against copies climbed one at a time 1 keyed periodic
reverted
0/24
0 2.4 h unclocked 255 F1.4: K4's rate of beating its copies ranked among 40 shuffled stand-ins, each on 80 of its own fitting key schedules through 0253's procedure 1 keyed periodic
reverted
0/24
0 2.3 h unclocked 254 F1.4: replicate 0253's excess (K4 above all 12 copies in 299 of 2,093 settings, chance 161): K4 on 400 of its settings with fresh copies, four shuffled stand-ins for K4 through the same procedure, and the 25 strongest of K4's 66 settings above all 100 against 100 fresh copies 1 keyed periodic
reverted
0/24
0 2.3 h unclocked 253 F1.4: every hand key schedule K4 fits on one free alphabet (2,093 settings, both forms), each decided by D1's one-run decider against copies climbed one at a time 1 keyed periodic
reverted
0/24
0 4.1 h 252 D2: the one-run decider's power and cost on F1.4's hand key schedules and on F6.1's moves, one free alphabet: 24 clean and 24 Sanborn-style plants per class, each on a setting K4 itself fits 1 keyed periodic
reverted
0/24
0 52 min 251 F14.7: plaintext style as the mask: vowel-dropped, telegraphese and abbreviated English added to the judge bench; power of the quadgram scorer, MIX8m and the blind judge against the bench's 200 hard negatives 14 scheidt mask keyed by words
reverted
0/24
0 3 min unclocked 250 F14.6c: every move of the type-1 library (either order), then the sculpture's table with a puzzle word and a dictionary word summed as the key; the known letters force the dictionary word, looked up among every rotation; K4 against 30 shuffles, 8 plants 14 scheidt mask keyed by words
reverted
0/24
0 2.8 h unclocked 249 F14.6b: keyword alphabets from the puzzle words around every move of the type-1 library (either order), the key a word of any length 1-26; every setting decided exactly by the known letters, the key words looked up; K4 against 30 shuffles, 8 plants 14 scheidt mask keyed by words
reverted
0/24
0 13 min unclocked 248 F14.6a: three puzzle key words summed on the sculpture's tables, and a puzzle keyword table with a puzzle word plus a dictionary word summed; the known letters force the last word, looked up among every rotation; K4 against 50 shuffles, plants of both forms 14 scheidt mask keyed by words
reverted
0/24
0 7 min unclocked 247 F14.5: 0244's two dictionary keyword alphabets and key word, with one carved letter lost (Scheidt's '98 characters'): the 23 distinct places a lost letter changes the key's alignment, every alphabet pair, key lengths 1-26; K4 against 20 shuffles per variant, a planted lost-letter message per variant 14 scheidt mask keyed by words
reverted
0/24
0 14 min unclocked 246 F14.3: the duress reading, a running key from English text with an English message: 0125's 3.7 million forced keys on the dictionary tables (and the sculpture's), ranked by MIX8m instead of quadgrams, the best read by the blind judge; K4 against 50 shuffles, 0125's 20 plants 14 scheidt mask keyed by words
reverted
0/24
0 11 min unclocked 245 F14.1 replication: K4's 5 fitting dictionary alphabet pairs at key length 16 (added form) against 1,000 fresh shuffles, counted as pairs and as distinct cipher alphabets 14 scheidt mask keyed by words
reverted
3.2%
24/24
5 4 min unclocked 244 F14.1: two different keyword alphabets from the whole dictionary, one on each side of the table, with a repeating key (free, then a key word): every pair of 208,064 alphabets matched exactly through an index, key lengths 1-26, both forms; K4 against 50 shuffles, plants at six lengths 14 scheidt mask keyed by words
reverted
3.2%
24/24
5 6 min Pivot P21: F13 ciphertext only → F14 Scheidt's mask, keyed by words 243 F13.5: memorable keys scored by English alone: key words, keyword tables, running keys from the named texts, autokey primers and keyword columnars from the source list, through the methods already built, no known letter read; K4 against 100 shuffles, plants per method 13 ciphertext only
reverted
92.9%
2/24
5 21 min unclocked 242 F13.5: memorable keys scored by English alone: key words, keyword tables, running keys from the named texts, autokey primers and keyword columnars from the source list, through the methods already built, no known letter read; K4 against 100 shuffles, plants per method 13 ciphertext only
error
0/24
0 13 min 241 F13.4f, part 1: two key words added, one from the puzzle and one from the whole dictionary (0115's space), solved from the ciphertext alone: every puzzle word, start and rule subtracted, every dictionary rotation scored per column, the best read by quadgrams and MIX8m; K4 against 100 shuffles, plants at four word lengths 13 ciphertext only
reverted
84.7%
4/24
22 4.7 h 240 F13.4e, Hill: 2x2 and 3x3, plain or affine, four letter numberings, every block alignment, solved from the ciphertext alone row by row; K4 against 100 shuffles, plants of both sizes 13 ciphertext only
reverted
88.7%
3/24
16 16 min 239 F13.4d follow-up: 0238's replicated cell (table, then a move, key length 2) regenerated for K4 and its 300 shuffles and judged blind: words, or statistics of the carved order? 13 ciphertext only
reverted
89.0%
4/24
4 13 min 238 F13.4d replication: 0237's K4 statistic (5.05 at table-then-move, key length 2, above all 100 shuffles, p 0.0099) against 300 fresh climbed shuffles, the search unchanged 13 ciphertext only
reverted
88.5%
4/24
40 5 min 237 F13.4d: every move of the type-1 library (27,852), before or after a periodic key on the sculpture's 8 table classes, key lengths 1-20, from the ciphertext alone; F6.1's free alphabet after a move blocked by 0236's power 13 ciphertext only
reverted
88.5%
4/24
40 8 min 236 F13.4c: one free alphabet with a periodic key (Quagmire III, both forms), lengths 1-19, from the ciphertext alone: power on planted messages first, then K4 against 50 climbed shuffles in the lengths the plants decide 13 ciphertext only
reverted
80.3%
5/24
10 18 min unclocked 235 F13.4b: a periodic key on 2.08 million dictionary keyword tables, key lengths 1-26, from the ciphertext alone: an exact per-column frequency screen of every table, then quadgram climbs and MIX8m on the best 50 per length 13 ciphertext only
reverted
85.0%
4/24
26 4.2 h 234 F13.4a: a periodic key on the sculpture's 8 table classes, key lengths 1-36, solved from the ciphertext alone (quadgram climb, MIX8m rescoring), K4 against 200 climbed shuffles, plants at seven lengths 13 ciphertext only
reverted
80.1%
5/24
36 5 min 233 F13.3: bits per letter each English judge extracts from 97 letters: the quadgram table, Kneser-Ney n-grams of order 5-8 alone and mixed with it, a word model, and the blind judge on a ladder of English-like soups 13 ciphertext only
reverted
0/24
0 9 min 232 F13.2 replication: the one cell where K4 beat 1,999 of 2,000 shuffles (ciphertext autokey, named features), with a classifier retrained on fresh texts, 5,000 fresh shuffles, and the features that drive it 13 ciphertext only
reverted
0/24
0 7 min 231 F13.2: a classifier trained on 17 cipher families' own 97-letter ciphertexts (no known words), its power on held-out texts, and K4 named against 2,000 shuffles of itself 13 ciphertext only
reverted
0/24
0 5 min unclocked 230 F13.2: a classifier trained on 17 cipher families' own 97-letter ciphertexts (no known words), its power on held-out texts, and K4 named against 2,000 shuffles of itself 13 ciphertext only
error
0/24
0 8 min Pivot P20: A cheaper decider (D1) → F13 ciphertext only 229 D1: design 2's power per run for one free alphabet, bounded with enough plants: 24 clean and 24 Sanborn-style plants at F1.1's Beaufort lengths 23 and 26, every run's best recorded 1 keyed periodic
reverted
0/24
0 42 min 228 D1: design 2's power against its budget: the tempering climb at full length and at a tenth, every number of runs 1-10, on clean and Sanborn-style plants at F1.1 L23 and F1.2 L13, each against its own copies 1 keyed periodic
reverted
0/24
0 1.9 h unclocked 227 A6.3: masked messages (reversed, an X every kth letter, the message in every nth place) planted through F1.5's design 2 at one free alphabet, Beaufort length 23, found by the decider, by the mask's own battery test and by the judge on the unmasked reading 1 keyed periodic
reverted
0/24
0 57 min 226 A6.2: the climbs' power on Sanborn-style plaintext: X stops, K1-K3 windows and three changed letters planted through F1.5's design 2 (one free alphabet at 23, two at 13) and 0125's running-key search, judged by quadgrams and by the blind judge 1 keyed periodic
reverted
0/24
0 75 min 225 A6.1, replication: 0034's completed periodic keys at lengths 27-29, where K4's best judged reading (8) led all 10 copies (best 7), against fresh copies of the same frozen search until one reaches 8 or 80 stay below 1 keyed periodic
reverted
1.9%
24/24
3 65 s unclocked 224 A6.1, replication: 0034's completed periodic keys at lengths 27-29, where K4's best judged reading (8) led all 10 copies (best 7), against fresh copies of the same frozen search until one reaches 8 or 80 stay below 1 keyed periodic
reverted
1.9%
24/24
3 2 min unclocked 223 A6.1, part 2: the completed periodic keys of 0034, 0035 and 0048 (lengths 27-29 on the sculpture's and the puzzle words' tables, and 0034's 53-95) rejudged blind: K4's saved readings against the same frozen searches' readings on 10 copies each 1 keyed periodic
reverted
1.7%
24/24
24 63 s unclocked 222 A6.1, part 2: the completed periodic keys of 0034, 0035 and 0048 (lengths 27-29 on the sculpture's and the puzzle words' tables, and 0034's 53-95) rejudged blind: K4's saved readings against the same frozen searches' readings on 10 copies each 1 keyed periodic
reverted
1.7%
24/24
24 3 min unclocked 221 A6.1, part 1: the sampled verdicts of 0120, 0125, 0140, 0142, 0144 and 0146 rerun unchanged from their frozen searches, with every best reading (K4's, the copies', the plants') read by the blind judge instead of quadgrams 1 keyed periodic
reverted
1.7%
24/24
4 44.0 h 220 A13.4: every 24-of-24 reading of 0207, 0212, 0213 and 0214 (A1's slipped searches) regenerated with their frozen searches for K4 and the same 20 scrambled copies, through the 14-test structure battery, with masked plants through 0207's search 1 keyed periodic
reverted
2.3%
24/24
12 17 min unclocked 219 A13.4: every 24-of-24 reading of 0207, 0212, 0213 and 0214 (A1's slipped searches) regenerated with their frozen searches for K4 and the same 20 scrambled copies, through the 14-test structure battery, with masked plants through 0207's search 1 keyed periodic
reverted
2.3%
24/24
12 16 min unclocked 218 A13.4: every 24-of-24 reading of 0207, 0212, 0213 and 0214 (A1's slipped searches) regenerated with their frozen searches for K4 and the same 20 scrambled copies, through the 14-test structure battery, with masked plants through 0207's search 1 keyed periodic
error
0/24
0 29 min unclocked 217 A13.3, replication: 0034's saved readings read backwards, the one candidate 0216 left unresolved, against more fresh copies of the same search, with reversed messages planted through 0034's own climb 1 keyed periodic
reverted
2.2%
24/24
3 41 min 216 A13.3: the 31 saved 24-of-24 readings of eight experiments put through the 14-test structure battery, against the same experiments' frozen searches run unchanged on fresh scrambled copies, with masked plants through two of the climbs 1 keyed periodic
reverted
1.7%
24/24
16 5.0 h unclocked 215 A13.3: the 31 saved 24-of-24 readings of eight experiments put through the 14-test structure battery, against the same experiments' frozen searches run unchanged on fresh scrambled copies, with masked plants through two of the climbs 1 keyed periodic
error
0/24
0 76.7 h 214 A1.5: a move, then the table (and the reverse), over every dictionary-keyed columnar, Myszkowski, double columnar, rail fence, AMSCO and type-1 route, with a repeating key of length 1-26 on the sculpture's tables and up to two of the 24 known letters carved wrong; exact, judged against scrambled copies, with planted slipped messages 6 transposition then tableau
reverted
6.5%
24/24
10 67 min unclocked 213 A1.4, part 2: plaintext autokey on the sculpture's and the vocabulary's tables, lags 1-52, with up to two carved slips breaking the chain, or one lost step that runs on through it; exact, the readings judged against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
4.5%
24/24
10 10 min 212 A1.4, part 1: ciphertext autokey on every keyword table tried so far, every lag, with up to two of the 24 known letters carved wrong or one skipped step in the chain; and the progressive key on the sculpture's tables with up to two slips; exact, judged against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
10.7%
24/24
10 17 min 211 A1.3, with moves: 0117's running keys from the sculpture's texts and Carter, plus any constant shift of the table, with or without every type-1 move, either order, allowing up to three of the 24 known letters to be slips, exact, against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
0/24
0 16 min 210 A1.3: running keys from the named texts (K1-K3, the sculpture's texts, Carter, Sanborn's letters) on the standard, KRYPTOS and keyword tables, with up to seven of the 24 known letters carved wrong, exact, against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
0/24
0 5 min 209 A1.2, step 3: two alphabets in unknown orders (Quagmire IV), a repeating key of length 1-26, with up to three of the 24 known letters carved wrong, decided exactly, against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
0/24
0 4 min 208 A1.2, step 2: one alphabet in an unknown order on both sides of the table (Quagmire III), a repeating key of length 1-26, with up to three of the 24 known letters carved wrong, decided exactly, against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
0/24
0 10 min 207 A1.2, step 1: a repeating key on the sculpture's tables with one, two or three of the 24 known letters carved wrong (a slip), every key length 1-26, exact, judged against scrambled copies, with planted slipped messages 1 keyed periodic
reverted
2.2%
24/24
50 8 min 206 F5.3: Gromark growth rules in bases 16-26 on the tables built from K1-K3's words and the 2025 letter (0054's 10,404 pairs), two- and three-term rules with lags to 13, exact, with scrambled copies and a planted Gromark text 5 gromark lfsr
reverted
0/24
0 4 s unclocked Pivot P19: F11 agency hand systems → F5 Gromark 205 F2.4: a run of nulls at both ends of the message (SOE's Dutch section), the known letters moved by the start run, then a periodic or progressive key on the table, exact, with planted texts 2 masked plaintext
reverted
0/24
0 7 s unclocked Pivot P17: F6 a move, then the table → F2 masked plaintext 204 F6.21, replication: 0203's row-reshuffle family, where K4 led every copy in 6 cells against a null of 1, rerun unchanged against 40 fresh scrambled copies, with a per-width breakdown; a deliberate slip in the keyword columnar (one column read out of its place, or two columns swapped), around every keyword columnar already tested, then or before a repeating key on the table, exact, with planted slips in the same run 6 transposition then tableau
reverted
0/24
0 18 min unclocked 203 F6.21, part 2 (trapezoid, row reshuffle, poem code): a deliberate slip in the keyword columnar (one column read out of its place, or two columns swapped), around every keyword columnar already tested, then or before a repeating key on the table, exact, with planted slips in the same run 6 transposition then tableau
reverted
0/24
0 11 min unclocked 202 F6.21: a deliberate slip in the keyword columnar (one column read out of its place, or two columns swapped), around every keyword columnar already tested, then or before a repeating key on the table, exact, with planted slips in the same run 6 transposition then tableau
reverted
0/24
0 31 min unclocked 201 F6.20, part 2: the turning grille with the grid copied out by columns, before or after a repeating key on the table; free keys of 1-4 letters and every key word of 7 or more, every card, exact, with planted grilles (rerun of 0200) 6 transposition then tableau
reverted
0/24
0 71 min unclocked 200 F6.20, part 2: the turning grille with the grid copied out by columns, before or after a repeating key on the table; free keys of 1-3 letters and every key word of 7 or more, every card, exact, with planted grilles 6 transposition then tableau
error
0/24
0 64 min unclocked 199 F6.20, part 1: a 10x10 turning grille (Fleissner) copied out by rows, before or after a repeating key on the table; free keys of 1-6 letters and every key word of 7 or more, every card, exact, with planted grilles in the same run 6 transposition then tableau
reverted
0/24
0 42.2 h 198 F9.1, second part: a one-to-one substitution, then each move in the three compiled libraries (mixed matrix triples, keyword triples, Nihilist squares): exact 9 substitution then transposition
reverted
0/24
0 38 s unclocked 197 F9.1: a one-to-one letter substitution, then each hand transposition built since 0106 (compass routes, keyword shapes, keyed blanks, row reshuffles, French diagonal, EVA, Chiffre XIII, YAR, the plate layout, the poem code): exact 9 substitution then transposition
reverted
0/24
0 70 s unclocked Pivot P16: F5 Gromark → F9 substitution, then a move 196 F5.1: Gromark with multiplicative feedback (each digit the product of two earlier ones) on a free mixed alphabet, bases 2-16 and 26, every primer: exact; YAR as a primer by subsumption 5 gromark lfsr
reverted
0/24
0 56 s unclocked 195 F5.2: Gromark on a free mixed alphabet: three-term rules in bases 2-9, 11-16 and 26, and two-term rules with longer lags (base 10 to 8, other bases to 6): exact 5 gromark lfsr
reverted
0/24
0 3 min unclocked Pivot P15: F8 Hill → F5 Gromark 194 F8.1: Hill 2x2 with an unknown one-to-one letter numbering (any of 26!), every invertible matrix, both alignments: exact; 3x3 counted and blocked 8 hill
reverted
0/24
0 8 min unclocked 193 F8.1: Hill 2x2 with an unknown one-to-one letter numbering (any of 26!), every invertible matrix, both alignments: exact; 3x3 counted and blocked 8 hill
error
0/24
0 0 s unclocked Pivot P14: F11 agency hand systems, now public → F8 Hill 192 F11.4: Friedman's keyed alphabet box (MC III 35b): the alphabet written n times into a rectangle as wide as a keyword, read out in the keyword's column order as the key stream; every dictionary keyword: exact 11 agency hand systems
reverted
0/24
0 26 s unclocked 191 F11.3: the CIA's Polish agent key box: a key text written into a box by rows and read out by columns, then a reciprocal or other table; K1-K3, the Morse and Carter's book as key texts: exact 11 agency hand systems
reverted
0/24
0 11 s unclocked 190 F11.2: the SOE poem code: a double columnar transposition keyed by consecutive words of K1-K3 and the Morse, then or before a repeating key on the sculpture's tables: exact 11 agency hand systems
reverted
0/24
0 5 s unclocked 189 F11.1: the US Army's M-94 cylinder (25 published discs) in any disc order, any cipher row per group of 25, any group alignment: exact 11 agency hand systems
reverted
0/24
0 0 s unclocked Pivot P13: F10 alphabets that change after every letter → F11 agency hand systems, now public 188 F10.2: Wheatstone's cryptograph (a 27-place plain ring against a 26-letter cipher ring, the hands moved by the distance between plaintext letters), free or word-mixed cipher ring: exact 10 self changing alphabets
reverted
0/24
0 10 s unclocked 187 F10.1: Chaocipher with the left (cipher) wheel started from any keyword-mixed alphabet at any rotation and the right (plain) wheel free: exact 10 self changing alphabets
reverted
0/24
0 74 s unclocked Pivot P12: F4 Sanborn's visual systems → F10 alphabets that change after every letter 186 F4.3: the places of the copper's physical anomalies (the four ?, K2's omitted letter, the raised YAR, the extra L, the long and short lines) as the number half of a two-part key, exact 4 sanborn visual
reverted
0/24
0 2 s unclocked 185 F4.2: trifid with a free 27-symbol cube at periods 16-97, every alignment, by constraint propagation: exact 4 sanborn visual
reverted
0/24
0 6 s unclocked 184 F4.1: routes that follow the copper's physical layout (K4's four lines starting after K3's tail and the ?, the lower plate, the whole left side), then or before a repeating key: exact 4 sanborn visual
reverted
0/24
0 2 s unclocked Pivot P11: F2 masked plaintext → F4 Sanborn's visual systems 183 F2.3: a 26-letter phrase with repeated letters as the plain strip, so a letter may be enciphered from any of its places (homophones that keep the length), repeating key 1-26: exact 2 masked plaintext
reverted
0/24
0 4 s unclocked 182 F2.2: nulls placed by any rule, which for a repeating or progressive key act only through the number of nulls between the two known runs (0-29): exact 2 masked plaintext
reverted
0/24
0 4 s unclocked 181 F2.1: after striking out every copy of one or two letters, the plaintext a repeating key of 24 or 25 forces outside the known runs, matched against the dictionary 2 masked plaintext
reverted
0/24
0 2 s unclocked Pivot P10: F3 a two-part key with a combiner → F2 masked plaintext 180 F3.7: 'point' read as the decimal point in K2's six point five, or as punctuation (the copper's four ?, K2's ? and X stops), as the number half of a two-part key, exact 3 two component key
reverted
0/24
0 2 s unclocked 179 F3.6: the Weltzeituhr's rotating ring of 24 time zones as the number half of a two-part key over 26 letters, with an unknown word, exact 3 two component key
reverted
0/24
0 3 s unclocked 178 F3.5: the misspelt letters' positions (IQLUSION, UNDERGRUUND, DESPARATLY, the missing E, the raised YAR) and their shifts as the number half of a two-part key, exact 3 two component key
reverted
0/24
0 2 s unclocked 177 F3.4: Scheidt's patent with two keyed tables and three repeating keys (N = 2), tables from the KRYPTOS order and its inverse, key lengths 1-10 each: exact 3 two component key
reverted
0/24
0 33 min unclocked 176 F3.3: EAST NORTHEAST and its parts read as numbers (bearing 67.5 degrees, compass points of 32 and 16, mils) as the number half of a two-part key, with an unknown word, exact 3 two component key
reverted
0/24
0 2 s unclocked 175 F3.2: the Morse E counts and the plate's line lengths as the number half of a two-part key, each reading with an unknown word, exact 3 two component key
reverted
0/24
0 3 s unclocked 174 F3.1: a puzzle word and a dictionary word joined by a combiner other than plain addition: through a table on a third, keyword-mixed alphabet, or by multiplication 3 two component key
reverted
0/24
0 5 s unclocked 173 F3.1: Scheidt's patent sandwich, a shift, a keyed table, a second shift and a second table, two repeating keys of length 1-13 each: exact 3 two component key
reverted
0/24
0 2 min Pivot P9: F12 Stein's way: look, quantify, then crib → F3 a two-part key with a combiner 172 F12.6: Stein's breakthrough, probable words: common English and K1-K3 words placed at every position in the free-alphabet cells the known letters leave undecided, decided exactly 12 steins way
reverted
0/24
0 30 min unclocked 171 F12.5: K4 as two parts with their own repeating keys, split between the two known runs, on the sculpture's tables: exact, with the checks each part leaves 12 steins way
reverted
0/24
0 39 s unclocked 170 F12.4: a pencil session: K4 written out at widths 7, 8, 13, 14, 21, 24 and 31, six patterns noted by eye, each then tested against 1,000 shuffles 12 steins way
reverted
0/24
0 3 min unclocked 169 F12.3: Stein's index-of-coincidence peak at 13 alphabets in K1 and K2: real or chance, against shuffles that keep each part's own key period 12 steins way
reverted
0/24
0 68 s unclocked 168 F12.2: Stein's way, step one: K4's statistics by segment and by width (letter counts per segment, index of coincidence for 1-48 alphabets, repeats at widths 7, 21 and 31), each against 1,000 shuffles, with the number of comparisons stated 12 steins way
reverted
0/24
0 4 min unclocked Pivot P8: F6 a move, then the table → F12 Stein's way: look, quantify, then crib 167 F6.14: the Nihilist transposition on a 10 x 10 square with three blank cells, one key of every order for rows and columns, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 5 min unclocked 166 F6.12, F6.13, F6.15: the Czech EVA double triangle and Chiffre XIII's five-row mask with its period-5 table, and the YAR '1-2-3' orderings, then the table 6 transposition then tableau
reverted
0/24
0 2 min unclocked 165 F6.10, F6.18, F6.19: blank cells placed by the keyword, letters reshuffled inside rows at widths 2-48, and the French diagonal method, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 86 s unclocked 164 F6.11, F6.16, F6.17: keyword-disrupted and triangle columnar, interrupted-key columnar and trapezoid transpositions, every dictionary keyword, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 4 min unclocked 163 F6.9: ciphertext and plaintext autokey, every lag, joined to 0084's double columnar routes (one stage of width 7 in all 5,040 orders), either order, on the sculpture's tables 6 transposition then tableau
reverted
0/24
0 6 min unclocked 162 F6.8: three-stage routes with at least one keyword columnar stage (puzzle and K1-K3 words), the others any of the four column readings at widths 2-24, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 3 min unclocked 161 F6.7: change, move, change with the two keyed stages on different tables (standard then KRYPTOS, or the reverse), key lengths 2-14 each, solved exactly 6 transposition then tableau
reverted
0/24
0 3 min unclocked 160 F6.6: move, change, move again: a grid reading or K3's rule, then a repeating key on the table, then a second move, every pair from a library of 950 moves 6 transposition then tableau
reverted
0/24
0 2 min unclocked 159 F6.5: the message written in rows and read off along a compass direction (each of the 16 points, and east then east-northeast or northeast in two stages), then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 35 s unclocked 158 F6.3b: every mixed triple of matrix readings with a width of 25 or more, enumerated exactly, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 6 min unclocked Pivot P7: F1 one keyed stage, no move (reopened) → F6 a move, then the table 157 F1.11: a split key phrase: its first part mixes the plain alphabet, its second the cipher alphabet, the whole phrase is the repeating key 1 keyed periodic
reverted
0/24
0 36 s unclocked 156 F1.10: Friedman's keyword-only key-advance schedules (run length by letter value, the CHRISTMAS expansion, EXTINGUISHER windows; ciphertext and plaintext interruptors; fraction-digit runs) on the sculpture's tables, exact, with scrambled copies 1 keyed periodic
reverted
0/24
0 66 s unclocked 155 F1.9: progressive keys, per-letter and per-repeat, every step and period 1-52, on the standard, KRYPTOS and every dictionary keyword table, against scrambled copies (Kryha's step of 3 included) 1 keyed periodic
reverted
0/24
0 7 min unclocked 154 F1.8: Carter's book as a running key on one unknown alphabet (both directions, every offset, three forms), solved exactly; and how many checks two unknown alphabets would leave for each running-key source 1 keyed periodic
reverted
0/24
0 24 min unclocked 153 F1.8: Carter's book as a running key on one unknown alphabet (both directions, every offset, three forms), solved exactly; and how many checks two unknown alphabets would leave for each running-key source 1 keyed periodic
error
0/24
0 31 min unclocked 152 F1.6, Hill controls: the same 5,044 single-letter errors on ten scrambled copies, against K4's 257 living Hill settings with a check 1 keyed periodic
reverted
0/24
0 5 min unclocked 151 F1.6, third part: every single-letter error in the copper (wrong, missing or extra, anywhere) through the exact Hill (sizes 2-5, plain and affine) and trifid (free cube) verdicts 1 keyed periodic
reverted
0/24
0 64 s unclocked 150 F1.6, second part: one carved letter wrong at a known place, or one letter missing or extra, through the exact free-alphabet Gromark verdicts (base 10 two- and three-term, other bases) 1 keyed periodic
reverted
0/24
0 24 min unclocked 149 F1.7: ciphertext and plaintext autokey on one unknown alphabet (both sides, any of 26! orders), every lag, three forms, decided exactly 1 keyed periodic
reverted
0/24
0 2 min unclocked 148 F1.6, the revived cell: K1 and K2's own system (one free alphabet, added form) at key length 19 with the carved S at place 33 taken as a slip; design 2's power on planted texts and K4 against its copies 1 keyed periodic
reverted
1.6%
24/24
1 18 min unclocked 147 F1.6: one carved letter wrong at a known place, or one letter missing or extra between the known runs, run through the exact tests for one and two unknown alphabets at every key length 1 keyed periodic
reverted
0/24
0 14 min unclocked 146 F1.2 decided at key length 8 with design 2 on two free alphabets: K4 against 12 copies of itself that keep the known places 1 keyed periodic
reverted
0/24
0 7 min unclocked 145 F1.2 at key length 8: design 2 on two free alphabets, its power on planted English against copies that keep the known places (0143's unfinished cell) 1 keyed periodic
reverted
0/24
0 12 min unclocked 144 F1.2 decided at key lengths 13 and 16 with design 2 on two free alphabets: K4 against 12 copies of itself that keep the known places 1 keyed periodic
reverted
0/24
0 14 min unclocked 143 F1.2: design 2 carried to two free alphabets (Quagmire IV), its power measured on planted English at key lengths 8, 13 and 16 against copies that keep the known places 1 keyed periodic
reverted
0/24
0 29 min unclocked 142 F1.1 at key length 26 decided with design 2: K4 against 12 scrambled copies of itself (one free alphabet, Beaufort form) 1 keyed periodic
reverted
1.7%
24/24
1 6 min unclocked 141 F1.1 at key length 26 decided with design 2 (K4 against its own copies); design 2 carried to two free alphabets (Quagmire IV) and its power measured at F1.2's lengths 8, 13 and 16 1 keyed periodic
error
0/24
0 30 min unclocked 140 F1.1 decided with F1.5's design 2: K4 against 12 scrambled copies of itself at key length 23 (one free alphabet, Beaufort form); design 2's power at length 26 1 keyed periodic
reverted
1.7%
24/24
1 16 min unclocked 139 F1.5 design 2: parallel tempering in the set that keeps the known letters, measured on planted English against scrambled copies of itself (one free alphabet, Beaufort form, key length 23) 1 keyed periodic
reverted
0/24
0 26 min unclocked 138 F1.5 design 1, checked: is the climb's power at key length 23 about English order? Each planted text against scrambled copies of itself 1 keyed periodic
reverted
0/24
0 31 min unclocked 137 F1.5 design 1: a climb that never breaks the 24 known letters, run in compiled code, measured on planted English before K4 (one free alphabet, Beaufort form, key lengths 23 and 26) 1 keyed periodic
reverted
1.7%
24/24
2 13 min 136 Which undecided cells could any English test decide? Each blocked cell's key, in bits, against what 73 unknown letters of English can carry 1 keyed periodic
reverted
0/24
0 11 min Pivot P6: F6 a move, then the table → F1 one keyed stage, no move (reopened) 135 Hand padding at each grid stage: the blank cells in any of eight places, dropped or carried as fillers into the next grid, one or two stages, then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 2 min unclocked 134 Two and three matrix stages in mixed readings (turn either way, Sanborn's rows-then-columns-down, and its reverse), then or before a repeating key on the table 6 transposition then tableau
reverted
0/24
0 5 min unclocked 133 Two alphabets in unknown orders (Quagmire IV) after or before every move of the type-1 library: exact at key lengths 1-10 on K4 and ten coppers, the per-slot test at 11-26 6 transposition then tableau
reverted
0/24
0 10 min unclocked 132 Two alphabets in unknown orders (Quagmire IV) after or before every move of the type-1 library: exact at key lengths 1-10 on K4 and ten coppers, the per-slot test at 11-26 6 transposition then tableau
reverted
0/24
0 29 min 131 Every move of the type-1 library, then a table built on two alphabets in unknown orders (Quagmire IV), key lengths 1-26, decided exactly 6 transposition then tableau
reverted
0/24
0 29 min unclocked 130 A table built on one alphabet in an unknown order, then every move of the type-1 library, key lengths 1-26, decided exactly 6 transposition then tableau
reverted
0/24
0 17 min unclocked 129 Every move of the type-1 library, then a table built on one alphabet in an unknown order, key lengths 1-26, decided exactly 6 transposition then tableau
reverted
0/24
0 31 min Pivot P5: F1 one keyed stage, no move → F6 a move, then the table 128 The hand schedules 0126 never reached: stutter, back and forth, triangle and square steps, restart at each carved line, and the tableau rows as keys, tested exactly against 30 coppers 1 keyed periodic
reverted
0/24
0 3 min unclocked 127 Replication: the skip schedule on two unknown alphabets, where K4 had more consistent settings than ten coppers (0126), against 30 fresh coppers with every setting covered 1 keyed periodic
reverted
0/24
0 9 min unclocked 126 Hand key schedules: the tableau rows as keys ('layer two'), a keyword stepped by skip, stutter, back-and-forth, triangle and square rules, and restarted at each carved line; each tested exactly on fixed, free and paired alphabets 1 keyed periodic
reverted
0/24
0 30 min 125 If the key were running English text: do the key letters forced at EASTNORTHEAST and BERLINCLOCK read as English under any of the 208,062 dictionary-word alphabets, better than on scrambled coppers? 1 keyed periodic
reverted
0/24
0 5 min 124 Replication: two unknown alphabets fit K4 at key length 19, where 3 of 100 scrambled coppers fit; against 1,000 fresh coppers, corrected for looking at every length, and against copies that keep the known places' letters 1 keyed periodic
reverted
0/24
0 9 min unclocked 123 Two alphabets in unknown orders, one for the message and one for the carved letters (Quagmire IV), no move: which key lengths 1-26 can any pair fit, and is that unusual against scrambled coppers? 1 keyed periodic
reverted
0/24
0 31 s unclocked 122 Two alphabets in unknown orders, one for the message and one for the carved letters (Quagmire IV), no move: which key lengths 1-26 can any pair fit, and is that unusual against scrambled coppers? 1 keyed periodic
error
0/24
0 6 s unclocked 121 Two alphabets in unknown orders, one for the message and one for the carved letters (Quagmire IV), no move: which key lengths 1-26 can any pair fit, and is that unusual against scrambled coppers? 1 keyed periodic
error
0/24
0 9 s unclocked 120 The two key lengths a free alphabet survives (Beaufort form, 23 and 26): climb the alphabet toward English with the 24 known letters fixed, against scrambled coppers at equal effort 1 keyed periodic
reverted
1.8%
24/24
2 28 min 119 One alphabet in an unknown order on both sides of the table (Quagmire III), no move: does any order fit the 24 known letters, key lengths 1-26, solved exactly? 1 keyed periodic
reverted
0/24
0 11 min Pivot P4: the sweep across the eight directions → F1 first, then the ranked order of work 118 Ciphertext autokey that runs on from K3: the key is the carved letter some distance back, K3's letters included 1 keyed periodic
reverted
0/24
0 7 s unclocked 117 The sculpture's texts as a running key plus one constant shift of the table, with or without a K3-style move 1 keyed periodic
reverted
0/24
0 19 min unclocked 116 A Hill matrix and a repeating key on the table, in either order: 'matrix codes', then 'back to this table' 8 hill polygraphic
reverted
0/24
0 2 min unclocked 115 Two key words added, one from the puzzle and one from the whole dictionary (key word/s, layer two) 3 two component key
reverted
0/24
0 6 min unclocked 114 AMSCO, a column shuffle with cells of one and two letters, keyed by any English word, with a repeating key 6 transposition then tableau
reverted
0/24
0 8 min unclocked 113 The rail fence and the redefence (rails read in any order), with a repeating key before or after 6 transposition then tableau
reverted
0/24
0 80 s unclocked 112 Double columnar with the same English word both times, with a repeating key before or after 6 transposition then tableau
reverted
0/24
0 3 min unclocked 111 A Myszkowski transposition keyed by any English word with a repeated letter, with a repeating key before or after 6 transposition then tableau
reverted
0/24
0 5 min unclocked 110 A column shuffle keyed by any English word, with a repeating key before or after 6 transposition then tableau
reverted
0/24
0 8 min unclocked 109 Tables built from any English word, not just the puzzle's, with a repeating key of length 1 to 26 1 keyed periodic
reverted
0/24
0 4 min unclocked 108 K4 read from the back of the screen, each carved line right to left, with a repeating key or an autokey 4 visual spatial
reverted
0/24
0 84 s unclocked 107 Gromark with a three-term digit rule and any mixed alphabet at all 5 gromark lfsr
reverted
0/24
0 2 min unclocked 106 A one-to-one letter substitution with every move built so far: paths, mixed turns, triple turns and the type-1 library 9 substitution then transposition
reverted
0/24
0 2 min unclocked 105 Affine Hill ciphers of size 2 to 5, solved from every known letter, not only whole blocks 8 hill polygraphic
reverted
0/24
0 2 min unclocked 104 The message as its own key, read through K3's counting rule: key letter for place i is the message letter at a + b i mod 97 1 keyed periodic
reverted
0/24
0 6 s unclocked 103 The copper as its own key, read through K3's counting rule: key letter for place i is the carved letter at a + b i mod 97 1 keyed periodic
reverted
0/24
0 30 s unclocked 102 The period-3 free-alphabet excess, against 400 scrambled coppers and 400 that keep K4's width-21 columns 6 transposition then tableau
reverted
0/24
0 3 min unclocked 101 An interrupted key: the key word starts again at the first letter of every word of the message 1 keyed periodic
reverted
0/24
0 42 s unclocked 100 The three marginal excesses of experiments 92, 93 and 97, recounted as distinct check sets against fifty fresh scrambled coppers 6 transposition then tableau
reverted
0/24
0 2 min unclocked 99 Two quarter turns in mixed directions (clockwise then anticlockwise, and the reverse), with a repeating key 6 transposition then tableau
reverted
0/24
0 42 s unclocked 98 A running key from the sculpture's texts on an unknown mixed alphabet, the table 'slightly different' 1 keyed periodic
reverted
0/24
0 8 min unclocked 97 A repeating key on unknown mixed alphabets (a free Quagmire) after or before a K3-style move 6 transposition then tableau
reverted
0/24
0 16 min unclocked 96 Which two-stage recipe, a move and a table, makes both of K4's width fingerprints at once 7 construction simulation
reverted
0/24
0 22 s unclocked 95 Words a riddle would use, dragged across K4 at every repeating-key length the known letters allow 1 keyed periodic
reverted
0/24
0 25 s unclocked 94 One letter dropped or added in carving, with a K3-style move and a repeating key on the true length 6 transposition then tableau
reverted
0/24
0 13 min unclocked 93 One carved letter wrong, through a K3-style move and a repeating key 6 transposition then tableau
reverted
0/24
0 12 min unclocked 92 The message written into a grid along one path and read out along another (snake, spiral, diagonal), with a repeating key before or after 2 masked plaintext
reverted
0/24
0 4 min unclocked 91 The Berlin clock as a key schedule, joined to a K3-style move before or after the table 6 transposition then tableau
reverted
0/24
0 19 min unclocked 90 A running key concealed at the sculpture, joined to a K3-style move before or after it 6 transposition then tableau
reverted
0/24
0 4 min 89 The key letter behind each K4 letter: K4's carved lines laid over the tableau plate, straight or folded 4 visual spatial
reverted
0/24
0 76 s 88 A key word over the columns plus a shift that changes every m letters, the carved lines of 31 among them 3 two component key
reverted
0/24
0 12 s 87 A key word over the columns and a second key over the rows: the message in rows of seven, each letter shifted by its column's letter and its row's letter 3 two component key
reverted
0/24
0 2 min unclocked Pivot P3: 6 transposition then tableau → 3 two-component key 86 The ? before OBKR as the 98th letter: a full 7 x 14 grid, turned so the ? comes out first, with an autokey or a repeating key 6 transposition then tableau
reverted
0/24
0 7 min unclocked 85 Column shuffles keyed by the puzzle's words, read the right way round this time: once or twice, with a repeating key or an autokey 6 transposition then tableau
reverted
0/24
0 12 min unclocked 84 Two column shuffles, one of them seven columns wide in any of its 5,040 orders, with a repeating key before or after 6 transposition then tableau
reverted
0/24
0 18 min 83 Three grid turns in a row at every width, then (or before) a repeating key: the triple matrix, exhaustively 6 transposition then tableau
reverted
0/24
0 13 min 82 The grid by hand: blank cells at the top, or filler letters carried through the second turn, then a repeating key 6 transposition then tableau
reverted
0/24
0 3 min 81 A grid turn or K3's rule joined to an autokey, the message (or the cipher) feeding its own key, in both orders 6 transposition then tableau
reverted
0/24
0 10 min 80 Change, turn, change again: a repeating key on the table, a K3-style grid turn, then a second repeating key, solved exactly 6 transposition then tableau
reverted
0/24
0 6 min 79 The Berlin clocks as the key: lamp counts of the set-theory clock and the hours on the World Clock, minute by minute 1 keyed periodic
reverted
0/24
0 2 min 78 Sanborn's own letters as the key: his 1989 note to CIA staff, the 1991 dedication pages, and his 2025 open letter 1 keyed periodic
reverted
0/24
0 3 min 77 Both fingerprints at once: every row of seven reshuffled, and the self-feeding autokey at every distance 1 keyed periodic
reverted
0/24
0 5 min 76 Gromark with any mixed alphabet, in number bases other than ten 5 gromark lfsr
reverted
0/24
0 3 min 75 Are the doubled letters fillers? Three of them carry known letters; the other three are struck out 2 masked plaintext
reverted
0/24
0 55 s 74 A mask that changes letters: the alphabet counted in steps of 3, 5, 7 ... or backwards, before the table 2 masked plaintext
reverted
0/24
0 63 s 73 The message as its own key, plus a repeating secret word on top 1 keyed periodic
reverted
0/24
0 2 min 72 The 32 points of the compass and the words of Sanborn's last hint as alphabets 1 keyed periodic
reverted
0/24
0 72 s 71 Sanborn's own table, slightly different from the carved one: every alphabet one step away from KRYPTOS 1 keyed periodic
reverted
0/24
0 2 min 70 Every block of seven letters reshuffled the same way, before or after the table 6 transposition then tableau
reverted
0/24
0 89 s 69 Gromark with any mixed alphabet at all, not just ones built from the puzzle's words 5 gromark lfsr
reverted
0/24
0 2 min 68 The self-feeding autokey again, allowing one carved letter to be wrong, missing or extra 1 keyed periodic
reverted
0/24
0 2 min 67 Two earlier carved letters as the key at once, with or without a short repeating word 1 keyed periodic
reverted
0/24
0 57 s 66 The previous carved letters as a key, plus a repeating secret word on top 1 keyed periodic
reverted
0/24
0 38 s 65 Which ways of making a cipher put the doubled letters in one column of seven? 7 construction simulation
reverted
0/24
0 58 s 64 The scrambled text as its own key, on tables rebuilt from the solved messages' words 1 keyed periodic
reverted
0/24
0 2 min unclocked 63 A column shuffle combined with the scrambled text as its own key, in either order 6 transposition then tableau
reverted
0/24
0 2 min 62 Which ways of making a cipher leave the copper's two real fingerprints? 7 construction simulation
reverted
0/24
0 2 s unclocked 61 A puzzle word plus the misspelled letters as a second, short secret word 3 two component key
reverted
71.3%
8/24
1 32 s 60 The map reference at the end of K2, used as the number table of a Hill cipher 8 hill polygraphic
reverted
85.1%
4/24
4 6 s unclocked 59 Two secret words in two passes, on tables rebuilt from the solved messages' words 3 two component key
reverted
0/24
0 14 s unclocked 58 The table first, then a column shuffle keyed by a word from the solved messages, once or twice 6 transposition then tableau
reverted
0/24
0 5 min 57 Filler letters chosen by letter: drop every copy of one or two letters, then the repeating secret word 2 masked plaintext
reverted
0/24
0 2 s unclocked 56 Are the copper's two odd patterns odd at all once every width is counted? 7 construction simulation
reverted
0/24
0 14 s unclocked 55 Hill again, with the letters numbered by alphabets built from the solved messages' words 8 hill polygraphic
reverted
14.7%
21/24
50 10 s unclocked 54 Number keys that grow by a rule, on tables rebuilt from the words of the solved messages 5 gromark lfsr
reverted
0/24
0 12 s 53 The repeating secret word again, on tables rebuilt from the words of the solved messages 1 keyed periodic
reverted
0/24
0 86 s 52 Ciphers that cannot write all 26 letters, or cannot write an odd number of them 8 hill polygraphic
reverted
0/24
0 0 s unclocked 51 Could K4 be its own letters rearranged? A count of the known letters against the carved ones 6 transposition then tableau
reverted
0/24
0 1 s unclocked 50 The copper off by one letter, through the two-word test on tables rebuilt from the puzzle's words 3 two component key
reverted
23/24
2 5 min unclocked 49 Long keys with a shape: two puzzle words joined, a word and its mirror, a word doubled, at the periods the cribs allow 1 keyed periodic
reverted
0/24
0 4 min 48 The last corner of family 1: both alphabets rebuilt from the puzzle's words, key completed at periods 27 to 29, sampled 1 keyed periodic
reverted
1.7%
24/24
3 12 min 47 Carter's book and the sculpture's own texts as running keys, on tables rebuilt from the puzzle's words 1 keyed periodic
reverted
0/24
0 8 min 46 Gromark with three-term rules and the bases 16 to 26 that experiment 28 left alive 5 gromark lfsr
reverted
0/24
0 2 min 45 The earlier messages as a running key, on tables rebuilt from the puzzle's words 1 keyed periodic
reverted
0/24
0 2 min 44 Hill again, with the letters numbered by every alphabet the puzzle's words can build 8 hill polygraphic
reverted
19.0%
21/24
50 33 s 43 Two key words in two passes, on tables rebuilt from the puzzle's words 3 two component key
reverted
0/24
0 76 s 42 A progressive key on a table rebuilt from the puzzle's words 1 keyed periodic
reverted
0/24
0 26 min 41 Routes beyond columns: spirals, snakes and diagonals through a grid, tested in both orders 6 transposition then tableau
reverted
0/24
0 73 s 40 Trifid with a free cube: the 24 known letters as equations on the cube's coordinates, solved exactly 4 visual spatial
reverted
0/24
0 32 s 39 Trifid with a free cube: the 24 known letters as equations on the cube's coordinates, solved exactly 4 visual spatial
error
0/24
0 2 min 38 A key word plus a number from the sculpture's own story: dates, the Morse counts, and 97 itself as the second component 3 two component key
reverted
0/24
0 58 s 37 Sanborn's triple matrixes: three grid stages in a row, sampled, then the tableau 6 transposition then tableau
reverted
0/24
0 3 min 36 The Hill variants Bauer left open: blocks chained to their neighbours, and two matrices taking turns 8 hill polygraphic
reverted
0/24
0 2 min 35 The same key completion at periods 27 to 29, with the table rebuilt from the puzzle's words 1 keyed periodic
reverted
1.8%
24/24
3 22 min 34 Finish the job at the surviving periods: fix the 24 forced key letters, climb the rest by English, and see how English the text can get 1 keyed periodic
reverted
1.9%
24/24
18 25 min 33 Trifid: the 27-cell cube that fractionates letters, with keyword cubes tested exactly and free cubes annealed 4 visual spatial
reverted
0/24
0 5 min 32 Sanborn's matrix with a key letter per row: write the message in rows of width w, encipher each row with one letter of the key 6 transposition then tableau
reverted
0/24
0 54 s 31 The copper off by one letter: the chained autokey and the two-word tests rerun with a letter dropped or added anywhere 1 keyed periodic
reverted
0/24
0 66 s 30 The text as its own key: the ciphertext under every index rule, and the message keyed by itself backwards 1 keyed periodic
reverted
0/24
0 79 s 29 Bean's closeness made a test: is there an alphabet pair under which every known letter moves only a little? 1 keyed periodic
reverted
0/24
0 62 s 28 Gromark in bases 2 to 9: the even bases that reproduce the width-21 repeats 5 gromark lfsr
reverted
0/24
0 7 s unclocked 27 Simulator, round two: which constructions reproduce the width-21 repeats, the width-7 doublet column and the closeness together? 7 construction simulation
reverted
0/24
0 51 s 26 Two keyed columnar transpositions from the puzzle's words, then the tableau 6 transposition then tableau
reverted
0/24
0 4 min 25 Both autokeys again, with the tableau built from the puzzle's own words 1 keyed periodic
reverted
0/24
0 47 min 24 A key word plus the K2 coordinates: the digits as a numeric second component added to a repeating word 3 two component key
reverted
0/24
0 62 s 23 Masks that move the known letters: the message written backwards, or padded with nulls, before a periodic tableau 2 masked plaintext
reverted
0/24
0 2 min 22 Porta: the reciprocal half-alphabet tableau, which the 24 conventions never covered 1 keyed periodic
reverted
0/24
0 70 s 21 A running key from Howard Carter's book: the text K3 paraphrases, slid past K4 at every offset 1 keyed periodic
reverted
0/24
0 2 min 20 The short periods come back: a periodic tableau at periods 1 to 52 with alphabets mixed from the puzzle's words 1 keyed periodic
reverted
0/24
0 26 min 19 Substitution first, a route last: do the 24 crib images stay one letter to one letter under any route? 9 substitution then transposition
reverted
0/24
0 3 min 18 Construction simulator: which cipher families produce texts with K4's statistical fingerprint? 7 construction simulation
reverted
0/24
0 15 min 17 A running key read off the sculpture: the carved tableau, the Morse, and the whole right-hand panel 1 keyed periodic
reverted
0/24
0 59 s 16 Every route from 0006 and 0008, then the tableau: does any route make the forced key read as English? 6 transposition then tableau
reverted
0/24
0 3 min 15 Hill ciphers 2x2, 3x3 and 4x4 solved straight from the crib blocks, with and without an added vector 8 hill polygraphic
reverted
35.6%
16/24
2 3 min 14 Two key words, two passes through the tableau: the cribs as linear equations mod 26 3 two component key
reverted
0/24
0 3 min 13 Gromark and its cousins: must the 13 known shifts in a row obey a lagged-Fibonacci rule? 5 gromark lfsr
reverted
0/24
0 89 s Pivot P2: 1 keyed periodic → 5 Gromark 12 Plaintext autokey, chained: the 24 known letters force the rest, lag by lag 1 keyed periodic
reverted
0/24
0 2 min 11 A progressive key: the key word steps forward on every repeat, which revives the short periods 1 keyed periodic
reverted
0/24
0 6 min 10 The same two forced key stretches, with the tableau's alphabets mixed from the puzzle's own words 1 keyed periodic
reverted
0/24
0 4 min 9 Do the two crib runs force a readable key, with the copper exact or off by one letter? 1 keyed periodic
reverted
0/24
0 2 min 8 K3's own matrix run through all the possible shifts, then the tableau 6 transposition then tableau
reverted
0/24
0 2 min 7 The keyed tableau first, a matrix transposition last: the order the NSA guessed in 1992 6 transposition then tableau
reverted
0/24
0 54 s unclocked 6 A matrix transposition first, the keyed tableau last: which routes let the 24 cribs force a short periodic key 6 transposition then tableau
reverted
0/24
0 4 min Pivot P1: 1 keyed periodic → 6 transposition then tableau 5 Periodic keyed tableau with separate alphabets: which periods survive, and what key they force 1 keyed periodic
reverted
0/24
0 0 s unclocked 4 A running key drawn from K1, K2 or K3 at every offset 1 keyed periodic
reverted
0/24
0 1 s unclocked 3 Plaintext autokey, decided where two known letters line up 1 keyed periodic
reverted
0/24
0 0 s unclocked 2 Ciphertext autokey is decided by the cribs at every lag and convention 1 keyed periodic
reverted
0/24
0 0 s unclocked 1 Baseline: keyed Vigenere over the sculpture's own alphabet with key KRYPTOS 1 keyed periodic
reverted
93.6%
2/24
1 0 s none