Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 31: Two Medium (DiffLev 6-7) Hyperstoical Puzzles (numbers 141-142)
- Step-by-step instructions for solving Puzzle 141, (78/144) Diff: 6/99.9991
- Step-by-step instructions for solving Puzzle 142, (78/144) Diff: 7/999.9962