Another puzzle that requires only one step to solve.
Robert
.8.....2.3..819..7..9...4....3.5.1......9.2.....2.4......5.7....76.3.91.4.......2
puzzle: Show
my resolution: Show
+-------------------------+-------------------+------------------------+
| 1567 8 157 | 6-7 4 56 | 3 2 9 |
| 3 24 24 | 8 1 9 | 56 x56 7 |
| z567* 56 9 | 3 zc27* 256 | 4 8 1 |
+-------------------------+-------------------+------------------------+
| z2789* 249 3 |zC67* 5 C68 | 1 y479 C48 |
| 5678 456 4578 | 1 9 3 | 2 x4567 4568 |
| 156789 1569 1578 | 2 78 4 | 5678 35679 3568 |
+-------------------------+-------------------+------------------------+
| a1289 a1239 a128 | 5 b268 7 | 68 xA346 wB3468 |
| 258 7 6 | 4 3 28 | 9 1 58 |
| 4 35 58 | 9 68 1 | 5678 x3567 2 |
+-------------------------+-------------------+------------------------+