Difficult Sudoku Eight Logic Puzzles (Vol 1)
Chapter 4: Sixteen Difficult (DiffLev 11-12) Sudoku-8 Puzzles (numbers 15-30)
- Step-by-step instructions for solving Puzzle 15, (40/64) Diff: 11/752.2112.6563
- Step-by-step instructions for solving Puzzle 16, (42/64) Diff: 11/443.2457.4342
- Step-by-step instructions for solving Puzzle 17, (43/64) Diff: 11/964.5222.2442
- Step-by-step instructions for solving Puzzle 18, (43/64) Diff: 11/454.4462.3362
- Step-by-step instructions for solving Puzzle 19, (44/64) Diff: 11/921.3334.3484
- Step-by-step instructions for solving Puzzle 20, (41/64) Diff: 12/4433.2334.4452
- Step-by-step instructions for solving Puzzle 21, (43/64) Diff: 12/631B.3225.3844
- Step-by-step instructions for solving Puzzle 22, (43/64) Diff: 12/41A1.2435.6844
- Step-by-step instructions for solving Puzzle 23, (43/64) Diff: 12/3434.3442.4543
- Step-by-step instructions for solving Puzzle 24, (44/64) Diff: 12/5221.B356.7452
- Step-by-step instructions for solving Puzzle 25, (44/64) Diff: 12/4623.3236.4452
- Step-by-step instructions for solving Puzzle 26, (44/64) Diff: 12/4423.4355.3344
- Step-by-step instructions for solving Puzzle 27, (44/64) Diff: 12/2222.4236.4854
- Step-by-step instructions for solving Puzzle 28, (45/64) Diff: 12/5464.421B.3536
- Step-by-step instructions for solving Puzzle 29, (45/64) Diff: 12/4462.1B46.8332
- Step-by-step instructions for solving Puzzle 30, (46/64) Diff: 12/8421.3335.5543