Hinge-based rectangle pattern using conjugate pair relationships to eliminate candidates.
Hinge cells in two boxes form a rectangle pattern. Using conjugate pair relationships through the hinges, candidates are eliminated from other cells in the pattern.
This technique catches eliminations that W-Wing and Skyscraper miss.
| 2 | 4 | 8 | 9 | 3 | 15 | 15 | 7 | 6 |
| 1 | 3 | 5 | 6 | 7 | 8 | 2 | 4 | 9 |
| 6 | 7 | 9 | 12 | 124 | 145 | 3 | 58 | 18 |
| 3 | 5 | 1 | 7 | 8 | 2 | 9 | 6 | 4 |
| 9 | 8 | 4 | 13 | 6 | 13 | 7 | 2 | 5 |
| 7 | 2 | 6 | 4 | 5 | 9 | 8 | 1 | 3 |
45 | 6 | 2 | 38 | 14 | 37 | 15 | 9 | 78 |
45 | 9 | 3 | 128 | 124 | 147 | 6 | 58 | 178 |
| 8 | 1 | 7 | 5 | 9 | 6 | 4 | 3 | 2 |
This 9×9 puzzle is solver-verified to require this technique on its solution path.