Difficult Sudoku Six Logic Puzzles (Vol 1)
Chapter 9: Twenty-Four Difficult (DiffLev 9) Sudoku-6up-UR-D Puzzles (numbers 145-168)
- Step-by-step instructions for solving Puzzle 145, (27/36) Diff: 9/4.4122.3443
- Step-by-step instructions for solving Puzzle 146, (27/36) Diff: 9/2.2211.2295
- Step-by-step instructions for solving Puzzle 147, (28/36) Diff: 9/7.2122.4541
- Step-by-step instructions for solving Puzzle 148, (28/36) Diff: 9/5.4232.1362
- Step-by-step instructions for solving Puzzle 149, (28/36) Diff: 9/5.3113.4443
- Step-by-step instructions for solving Puzzle 150, (28/36) Diff: 9/5.1142.3435
- Step-by-step instructions for solving Puzzle 151, (28/36) Diff: 9/4.31A2.1493
- Step-by-step instructions for solving Puzzle 152, (28/36) Diff: 9/4.2233.2642
- Step-by-step instructions for solving Puzzle 153, (28/36) Diff: 9/4.2212.2555
- Step-by-step instructions for solving Puzzle 154, (28/36) Diff: 9/2.A323.3581
- Step-by-step instructions for solving Puzzle 155, (28/36) Diff: 9/2.1252.2365
- Step-by-step instructions for solving Puzzle 156, (29/36) Diff: 9/4.4313.5522
- Step-by-step instructions for solving Puzzle 157, (29/36) Diff: 9/4.4212.2572
- Step-by-step instructions for solving Puzzle 158, (29/36) Diff: 9/3.6211.4642
- Step-by-step instructions for solving Puzzle 159, (29/36) Diff: 9/3.3342.3452
- Step-by-step instructions for solving Puzzle 160, (29/36) Diff: 9/3.2231.1493
- Step-by-step instructions for solving Puzzle 161, (29/36) Diff: 9/3.2144.3741
- Step-by-step instructions for solving Puzzle 162, (29/36) Diff: 9/1.A124.9641
- Step-by-step instructions for solving Puzzle 163, (29/36) Diff: 9/1.2123.5861
- Step-by-step instructions for solving Puzzle 164, (30/36) Diff: 9/3.4553.2422
- Step-by-step instructions for solving Puzzle 165, (30/36) Diff: 9/2.3225.5551
- Step-by-step instructions for solving Puzzle 166, (30/36) Diff: 9/2.3222.3475
- Step-by-step instructions for solving Puzzle 167, (30/36) Diff: 9/1.2235.3455
- Step-by-step instructions for solving Puzzle 168, (30/36) Diff: 9/1.1356.2462