- Code: Select all
+-----------------+-----------+-----------+
| 57 469 69 | 1 2 49 | 8 3 57 |
| 137 123 123 | 8 5 6 | 4 9 27 |
| 45 249 8 | 3 7 49 | 25 1 6 |
+-----------------+-----------+-----------+
| 13 1236 1236 | 46 9 5 | 7 8 14 |
| 8 7 56 | 46 3 1 | 9 2 45 |
| 9 15 4 | 2 8 7 | 15 6 3 |
+-----------------+-----------+-----------+
| 6 35 35 | 9 4 8 | 12 7 12 |
| 14 149 19 | 7 6 2 | 3 5 8 |
| 2 8 7 | 5 1 3 | 6 4 9 |
+-----------------+-----------+-----------+
the scenic route
(3=1)r4c1 - (1=5)r6c2 - (5=3)r7c3; r4c2 <> 3
ur(49)r13c26; in the columns, 4 and 9 are restrained to r8c2; r8c2 <> 1
xyz-wing (469)r18c23; r3c2 <> 9
(5)r1c9 = (5)r3c7 - (5=4)r3c1 - (4)r3c2 = (4-9)r8c2 = (9)r8c3 - (9=6)r1c3 - (6=5)r5c3; r5c9 <> 5; puzzle collapses.