Difficult Sudoku Logic Puzzles (Vol 1)
Chapter 3: Thirty Difficult (DiffLev 9) Sudoku Puzzles (numbers 1-30)
- Step-by-step instructions for solving Puzzle 1, (45/81) Diff: 9/9.4674.3532
- Step-by-step instructions for solving Puzzle 2, (47/81) Diff: 9/9.5423.5664
- Step-by-step instructions for solving Puzzle 3, (48/81) Diff: 9/9.6336.5483
- Step-by-step instructions for solving Puzzle 4, (48/81) Diff: 9/9.4445.8742
- Step-by-step instructions for solving Puzzle 5, (49/81) Diff: 9/9.6375.4534
- Step-by-step instructions for solving Puzzle 6, (49/81) Diff: 9/9.4653.2494
- Step-by-step instructions for solving Puzzle 7, (50/81) Diff: 9/9.9732.3464
- Step-by-step instructions for solving Puzzle 8, (50/81) Diff: 9/9.5434.4677
- Step-by-step instructions for solving Puzzle 9, (50/81) Diff: 9/8.5565.4359
- Step-by-step instructions for solving Puzzle 10, (50/81) Diff: 9/6.4558.9562
- Step-by-step instructions for solving Puzzle 11, (51/81) Diff: 9/9.5545.9643
- Step-by-step instructions for solving Puzzle 12, (51/81) Diff: 9/9.3345.6488
- Step-by-step instructions for solving Puzzle 13, (51/81) Diff: 9/8.6477.4591
- Step-by-step instructions for solving Puzzle 14, (51/81) Diff: 9/8.5455.8961
- Step-by-step instructions for solving Puzzle 15, (52/81) Diff: 9/9.9963.4341
- Step-by-step instructions for solving Puzzle 16, (52/81) Diff: 9/9.4547.9441
- Step-by-step instructions for solving Puzzle 17, (52/81) Diff: 9/6.6475.6971
- Step-by-step instructions for solving Puzzle 18, (53/81) Diff: 9/9.8795.6351
- Step-by-step instructions for solving Puzzle 19, (53/81) Diff: 9/8.7985.5532
- Step-by-step instructions for solving Puzzle 20, (53/81) Diff: 9/8.5335.5993
- Step-by-step instructions for solving Puzzle 21, (53/81) Diff: 9/6.5388.8933
- Step-by-step instructions for solving Puzzle 22, (54/81) Diff: 9/9.5579.5451
- Step-by-step instructions for solving Puzzle 23, (54/81) Diff: 9/9.4755.5667
- Step-by-step instructions for solving Puzzle 24, (54/81) Diff: 9/8.4245.8984
- Step-by-step instructions for solving Puzzle 25, (54/81) Diff: 9/7.6575.7683
- Step-by-step instructions for solving Puzzle 26, (54/81) Diff: 9/6.5468.9744
- Step-by-step instructions for solving Puzzle 27, (54/81) Diff: 9/5.2467.8967
- Step-by-step instructions for solving Puzzle 28, (55/81) Diff: 9/9.5344.7992
- Step-by-step instructions for solving Puzzle 29, (56/81) Diff: 9/9.7754.4682
- Step-by-step instructions for solving Puzzle 30, (56/81) Diff: 9/4.5345.7995