Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Winning blow: knight to d8 (e6·2)
Attack on the uncastled king: queen to a6 (a3)
Winning blow: queen to d4
Attack on the uncastled king: king to g2 (g1)
Attack on the uncastled king: knight to f6 (d5)
Winning blow: pawn to b7 (c6)
Attack on the uncastled king: knight to h5 (g3·4)
Attack on the uncastled king: rook to f4 (f1)
Attack on the uncastled king: queen to h8 (d4·2)
Winning blow: knight to a3 (c2)
Attack on the uncastled king: knight to c2
Attack on the uncastled king: queen to b1 (a1)
Winning blow: pawn to c3 (b2·5)
Attack on the uncastled king: knight to e1
Winning blow: queen to d4 (d2)
Winning blow: knight to h2 (f1)
Attack on the uncastled king: pawn to g3 (f2·3)
Attack on the uncastled king: pawn to d4 (c3·6)
Attack on the uncastled king: king to b2 (c1·2)
Attack on the uncastled king: bishop to a7 (g1)
Attack on the uncastled king: rook to f8 (g8)
Attack on the uncastled king: bishop to a5 (e1·3)
Attack on the uncastled king: pawn to e5 (d4·20)
Attack on the uncastled king: rook to c8 (c1·3)
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