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Evil · Puzzle #683
4
1
9
5
6
8
3
5
7
4
9
5
2
8
1
3
2
2
1
5
1
2
7
1
6
5
The 'Skyscraper' technique links two X-Wing candidates via a shared column — advanced but powerful on expert grids.
The 'Skyscraper' technique links two X-Wing candidates via a shared column — advanced but powerful on expert grids.
"Problems worthy of attack prove their worth by fighting back." — Piet Hein
"Problems worthy of attack prove their worth by fighting back." — Piet Hein