Cipher Challenge
My first Playfair
Introduction
This is a Playfair cipher, so analyze fixed digraphs rather than single letters. Read the Ciphertext as pairs at positions 1–2, 3–4, and so on; never move those boundaries. Use Pair frequencies and Repeated sequences to choose a recurring cipher pair, then propose a likely plaintext digraph and record the row, column, or rectangle relationship that the pair would require. Build a complete I/J-combined 5 × 5 candidate in Alphabet Square. Connect it to Playfair transform, choose Decrypt, and Run. Keep a square change only when it improves several independent pairs under the Playfair rules. Revise the square until the full Result is readable, and submit it with legitimate filler letters left in place.
Live gridCurrent
Live column keyUnavailable
| Rows | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | A | T | X | A | Q | T | Q | |
| D | Y | Y | E | U | F | Z | E | |
| M | L | X | D | M | U | I | E | |
| K | H | U | M | O | K | H | B | |
| N | Q | F | M | X | R | F | B | |
| D | U | M | P | Q | K | F | S | |
| R | X | E | N | M | G | O | K | |
| D | T | Y | K | Y | R | K | F | |
| R | Y | Y | K | U | M | R | S | |
| T | S | Y | S | U | M | U | C | |
| K | Z | Y | F | C | A | M | L | |
| T | U | L | O | N | P | Q | M |
Read
BATXAQTQDYYEUFZEMLXDMUIEKHUMOKHBNQFMXRFBDUMPQKFSRXENMGOKDTYKYRKFRYYKUMRSTSYSUMUCKZYFCAMLTULONPQMBA DY ML KH NQ DU RX DT RY TS KZ TU1
BATXA QTQDY YEUFZ EMLXD MUIEK
26
HUMOK HBNQF MXRFB DUMPQ KFSRX
51
ENMGO KDTYK YRKFR YYKUM RSTSY
76
SUMUC KZYFC AMLTU LONPQ MDVBF
101
ENKBD XKEFP YKSMK MKBTU DYYEM
126
LNDTD MTFBS TUTKE FPYKE MTDAC
151
TDEMU FGRYK YRACR XDVDG VNKFK
176
FRYYK UDTDR NSTMG FBMUB YFPTK
201
XGEFV SFDSP FZBFF POGAQ YENUK
226
FRYYK XIKES TEBCQ KRECM UUQDT
251
ACRXO MNQNE CUIXS PNTXR VNACR
276
XTDUF RKCQB GKMDC PUYKX DMQFT
301
BFOFZ PKALO DFQYK RIKCU IRBGM
326
UGRHC TSPSI ZIFNT GRISS PTXEY
351
HMUCF CPDQM YOMLX DCWFB CQKEU
376
FPSKF EUCFC PSPAH RATCM LXDCW
401
FBCQK EUFPS TACUF MTDPN CUHGK
426
EMLTU PLFBQ KBPMY AMDGY KOMTQ
451
DTBVI KKFTK KEGRI NBOMQ EFTUN
476
TTSCO KOQMF OFHKE UFGRY KYRIR
501
INCAI KQUMO CQENU MGRNE CQQKF
526
BRNMU KYKBV GDYKT CUPQK BTMML
551
TULON PCQDL XDENK BFCPD AKCOD
576
PSTUT DKSPN ERNMU SPLOV NFBQK
601
PUBCG ZBPTS ACRXF QRECP CLFBS
626
YDTFU PQKBN DTDPD ODDTQ KPUTD
651
EKPUF EAKML QUDYU KKYYK NDMUF
676
BKEMU PUFEE WFLKG KFUMR SFLGR
701
FUDLI ZKFXD PZOMP AKFYK QKFKC
726
FYEML XICQP QTDPM YSSYD TZYMQ
751
UONUM PPUGM FUKZB CPDMU SKSTR
776
LTSKF RYYKN DCUFM MVPSE YFEDL
801
IZKFN DPCXT DPMLR GQUKB BCUZR
826
KCQ
BATXA QTQDY YEUFZ EMLXD MUIEK HUMOK HBNQF MXRFB DUMPQ KFSRX ENMGO KDTYK YRKFR YYKUM RSTSY SUMUC KZYFC AMLTU LONPQ MDVBF ENKBD XKEFP YKSMK MKBTU DYYEM LNDTD MTFBS TUTKE FPYKE MTDAC TDEMU FGRYK YRACR XDVDG VNKFK FRYYK UDTDR NSTMG FBMUB YFPTK XGEFV SFDSP FZBFF POGAQ YENUK FRYYK XIKES TEBCQ KRECM UUQDT ACRXO MNQNE CUIXS PNTXR VNACR XTDUF RKCQB GKMDC PUYKX DMQFT BFOFZ PKALO DFQYK RIKCU IRBGM UGRHC TSPSI ZIFNT GRISS PTXEY HMUCF CPDQM YOMLX DCWFB CQKEU FPSKF EUCFC PSPAH RATCM LXDCW FBCQK EUFPS TACUF MTDPN CUHGK EMLTU PLFBQ KBPMY AMDGY KOMTQ DTBVI KKFTK KEGRI NBOMQ EFTUN TTSCO KOQMF OFHKE UFGRY KYRIR INCAI KQUMO CQENU MGRNE CQQKF BRNMU KYKBV GDYKT CUPQK BTMML TULON PCQDL XDENK BFCPD AKCOD PSTUT DKSPN ERNMU SPLOV NFBQK PUBCG ZBPTS ACRXF QRECP CLFBS YDTFU PQKBN DTDPD ODDTQ KPUTD EKPUF EAKML QUDYU KKYYK NDMUF BKEMU PUFEE WFLKG KFUMR SFLGR FUDLI ZKFXD PZOMP AKFYK QKFKC FYEML XICQP QTDPM YSSYD TZYMQ UONUM PPUGM FUKZB CPDMU SKSTR LTSKF RYYKN DCUFM MVPSE YFEDL IZKFN DPCXT DPMLR GQUKB BCUZR KCQ—Live output827 adjacent pairs
| Pair | Count | Share |
|---|---|---|
YK | 16 | 1.9% |
KF | 14 | 1.7% |
MU | 12 | 1.5% |
QK | 11 | 1.3% |
TD | 11 | 1.3% |
UF | 11 | 1.3% |
FB | 10 | 1.2% |
KE | 10 | 1.2% |
ML | 10 | 1.2% |
CQ | 9 | 1.1% |
DT | 9 | 1.1% |
KB | 8 | 1.0% |
Find recurring Latin-letter groups and their gaps.
Live output113 repeated 3-unit sequences
YYKpositions 66, 178, 228, 668, 782gaps 112, 50, 440, 114ACRpositions 163, 251, 273, 611gaps 88, 22, 338CRXpositions 164, 252, 274, 612gaps 88, 22, 338EMLpositions 16, 124, 426, 728gaps 108, 302, 302EUFpositions 12, 374, 406, 490gaps 362, 32, 84FRYpositions 64, 176, 226, 780gaps 112, 50, 554KFRpositions 63, 175, 225, 779gaps 112, 50, 554LXDpositions 18, 364, 396, 560gaps 346, 32, 164MLXpositions 17, 363, 395, 729gaps 346, 32, 334RYYpositions 65, 177, 227, 781gaps 112, 50, 554TDPpositions 417, 637, 737, 810gaps 220, 100, 73BCQpositions 238, 370, 402gaps 132, 32—
Select a Square source.