In  Maggie Had a Little Pigpen  in the May 1991 Word Ways, Peter Newby pointed out that if a 3-by-3 word square was encoded using the pigpen cipher and inverted, it might be possible to read off another 3-by-3 square upon decoding

Bulten, John

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190 PIGPEN-CIPHER-INVERTIBLE SQUARES FOR SOl JOHN BULTEN STEPHEN J. Boyn ton Beach, florida fayetteville ln "Maggie Had a Little Pigpen" in the May 1991 Word Ways , don't Peter Newb y pointed out that if a 3-by-3 word square was encoded likely: a s using the pigpen cipher and inverted, it might be possible to it treated m read off another 3-by-3 square upon decoding. To ascertain how This enigma common such squares might be, 1 first prepared a list of the 80 of palindrol pigpen-cipher-invertible words in the Official Scrabble Players asset) and Dic tionary (first edition) . These were then used to construct 24 If the odds families of in verti b le 3-by-3 squares, listed below; the original million to a square is at the left and the decoded inverted square, at the occurrence right. The mind pa lAD OAF CAR HAJ FEU LOT 2AB HAH GAL 3AP NEB NTH A DUO GOlANI ANI ANI ANI ELM OPE ANI ANI ANI ANI E4U T4E Evi1 StaDIM FIl RIB JIG UMP TED BIB HI2 LI3 PIC BUN HEN ATE fETA~ Star, ISOPE 50E OPE PEE PAN PAN PEE 50E TIE 50E VAS VAV CHEESE NC PAM OIL PEE EEL ANI ANI ELM OPE ISM OVA ANI ANI CHEESE? SEM 5 ELM EEL ELM NIL NIL EM5 EEL EM5 EAU SIS VIS DISK COLB 1 = CFHPW/GDBLZ 2= GLN/CPN 3 = BNP/HNL 4= AM/IO 5 = SU/VT EDAM HAN~ HE ATE FEThere a re 55 fou r-l e tter words in the OSPD that are p igpen-cip- HE MAD E E her-invertible to other OSPD words; these are listed below . The HE MAD E I o n es in boldface are self-inv ertib l e. However, no invertible 4-by- LAY BLOCK 4 word squares could be constructed from these. NO BR1E, AMIN BUMF BUMP DEAD DOTH EGAD EGAL EPIC EVIL FAIL FEAL NOTE SWIS FEED FEEL FlCE FlEF GALE GAUM GNAW JAIL JEEP JEER JEES NO ROMANC JEEZ LEER LEES LIEN LOTH NAIL NAOI NEAP OTIC PAID PAIL NOT LIT, PAIN PAIR PASE PEED PEEL PIAL PIAS PICE PIED PIES THEW WHY BLOCK TINT TUTU UNAU VEAL VEEP VEER VEES VIAL WEER ZEBU ZINC 

Pigpen-Cipher-Invertible Squares

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Pigpen-Cipher-Invertible Squares

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