Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Attack on the uncastled king: king to e1 (f1·2)
Winning blow: king to c3 (d2·3)
Winning blow: king to c2 (c1·3)
Winning blow: king to g1 (f1·10)
Attack on the uncastled king: bishop to e3 (g1·5)
Winning blow: king to h1 (g1·8)
Winning blow: king to f1 (e1·5)
Attack on the uncastled king: king to c2 (b1·9)
Winning blow: king to c3 (d2·4)
Winning blow: king to f2 (g1·5)
Winning blow: rook to h3 (g3·2)
Winning blow: king to a2 (b1·7)
Winning blow: pawn to g4 (g3·2)
Winning blow: king to e1 (f2·4)
Attack on the uncastled king: bishop to e2 (f1)
Winning blow: king to a3 (b2)
Attack on the uncastled king: pawn to b3 (b2·3)
Winning blow: king to f1 (e1·6)
Winning blow: king to a1 (b1·7)
Winning blow: bishop to c2 (d1)
Winning blow: bishop to d3 (e2·2)
Attack on the uncastled king: bishop to d2 (b4)
Winning blow: rook to f2 (f7)
Winning blow: king to a2 (b1·8)
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