Difficult Sudoku Six Logic Puzzles (Vol 1)
Chapter 10: Twenty-Two Difficult (DiffLev 10) Sudoku-6up-UR-D Puzzles (numbers 169-190)
- Step-by-step instructions for solving Puzzle 169, (28/36) Diff: 10/32.3212.3453
- Step-by-step instructions for solving Puzzle 170, (28/36) Diff: 10/23.1121.2574
- Step-by-step instructions for solving Puzzle 171, (28/36) Diff: 10/12.A412.4472
- Step-by-step instructions for solving Puzzle 172, (28/36) Diff: 10/11.2344.2443
- Step-by-step instructions for solving Puzzle 173, (28/36) Diff: 10/11.1123.8434
- Step-by-step instructions for solving Puzzle 174, (29/36) Diff: 10/51.1A13.3743
- Step-by-step instructions for solving Puzzle 175, (29/36) Diff: 10/4A.A111.3476
- Step-by-step instructions for solving Puzzle 176, (29/36) Diff: 10/42.2113.2545
- Step-by-step instructions for solving Puzzle 177, (29/36) Diff: 10/33.2232.3443
- Step-by-step instructions for solving Puzzle 178, (29/36) Diff: 10/32.3331.4343
- Step-by-step instructions for solving Puzzle 179, (29/36) Diff: 10/32.2241.1563
- Step-by-step instructions for solving Puzzle 180, (29/36) Diff: 10/23.4213.4451
- Step-by-step instructions for solving Puzzle 181, (29/36) Diff: 10/21.3211.2476
- Step-by-step instructions for solving Puzzle 182, (29/36) Diff: 10/21.2214.5453
- Step-by-step instructions for solving Puzzle 183, (29/36) Diff: 10/21.1334.3345
- Step-by-step instructions for solving Puzzle 184, (29/36) Diff: 10/1A.3232.1367
- Step-by-step instructions for solving Puzzle 185, (29/36) Diff: 10/1A.2323.3383
- Step-by-step instructions for solving Puzzle 186, (29/36) Diff: 10/14.2234.3442
- Step-by-step instructions for solving Puzzle 187, (29/36) Diff: 10/11.432A.3464
- Step-by-step instructions for solving Puzzle 188, (30/36) Diff: 10/21.2131.2594
- Step-by-step instructions for solving Puzzle 189, (30/36) Diff: 10/21.1311.1587
- Step-by-step instructions for solving Puzzle 190, (30/36) Diff: 10/1A.1144.6345