Monster Latin Square - Original Puzzles
Monster Latin Square won the 2004 American Mensa PRP award for best Web puzzle.
Place the letters A-I into the 81 squares so that no letter appears twice in any row, twice in any column, or twice in any 9-square region bordered by heavy lines.
- Monster Latin Square #3 (not rated)
- Monster Latin Square #2 (medium)
- Monster Latin Square #1 (medium)
Puzzle editing & Web programming by Matt Crawford. Puzzle creation as credited.