Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Winning blow: rook to b3 (a3)
Winning blow: bishop to c2 (b1·5)
Winning blow: rook to f2 (f3)
Winning blow: king to f2 (g2·2)
Attack on the uncastled king: bishop to e3 (g1·6)
Winning blow: king to g1 (h2·2)
Winning blow: king to g1 (h1·3)
Winning blow: king to h2 (g1·11)
Attack on the uncastled king: king to c2 (b2)
Winning blow: king to b2 (c2·3)
Winning blow: king to c2 (b1·4)
Winning blow: king to d2 (e1·8)
Winning blow: king to e2 (d1·8)
Winning blow: king to b1 (c1·8)
Winning blow: king to d1 (e2·3)
Winning blow: king to c1 (b1·5)
Winning blow: king to f1 (e2)
Attack on the uncastled king: rook to g2 (g1·7)
Winning blow: knight to d2 (b3·2)
Winning blow: king to g2 (f1·4)
Winning blow: rook to e1 (e2)
Attack on the uncastled king: king to d2 (d1·5)
Winning blow: bishop to f2 (g1·4)
Winning blow: king to h2 (g1·13)
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