Challenging Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 25: Two Challenging (DiffLev 17-20) Exhaustingly Puzzles (numbers 129-130)
- Step-by-step instructions for solving Puzzle 129, (88/144) Diff: 17/9.9424.31C4.3446.7993
- Step-by-step instructions for solving Puzzle 130, (95/144) Diff: 20/9631.2A13.22A2.3489.8799