Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 51: Two Medium (DiffLev 5-6) Unimprovable Puzzles (numbers 181-182)
- Step-by-step instructions for solving Puzzle 181, (67/144) Diff: 5/9.9961
- Step-by-step instructions for solving Puzzle 182, (72/144) Diff: 6/99.9971