Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Attack on the uncastled king: knight to g6 (h4)
Attack on the uncastled king: queen to h7
Attack on the uncastled king: queen to b7 (b3)
Attack on the uncastled king: bishop to b8 (f4)
Attack on the uncastled king: king to e2
Attack on the uncastled king: queen to g2 (g3)
Winning blow: bishop to f4
Attack on the uncastled king: knight to g1
Winning blow: pawn to g3 (f2)
Attack on the uncastled king: knight to g2
Attack on the uncastled king: king to f2
Winning blow: knight to e6
Winning blow: pawn to e5 (f4)
Attack on the uncastled king: knight to a4
Winning blow: rook to g2
Attack on the uncastled king: pawn to b3 (a2·3)
Attack on the uncastled king: pawn to c4 (b3·5)
Attack on the uncastled king: bishop to b7 (h1)
Attack on the uncastled king: rook to h3
Attack on the uncastled king: knight to f6
Winning blow: rook to d1 (f1)
Attack on the uncastled king: queen to d4
Attack on the uncastled king: pawn to f5 (e4)
Attack on the uncastled king: rook to c7
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