Challenging Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 22: Two Challenging (DiffLev 15-16) Considerably Puzzles (numbers 123-124)
- Step-by-step instructions for solving Puzzle 123, (94/144) Diff: 15/999.6544.4323.6794
- Step-by-step instructions for solving Puzzle 124, (89/144) Diff: 16/921A.1233.3279.9992