Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Winning blow: knight to e5 (f3·9)
Attack on the uncastled king: queen to c8 (d8·3)
Winning blow: queen to d5 (a2)
Winning blow: knight to e5 (f3·10)
Winning blow: knight to g6 (f4·5)
Winning blow: knight to e7 (d5·17)
Attack on the uncastled king: queen to f8 (h6·3)
Attack on the uncastled king: rook to b7 (b3)
Winning blow: knight to e6 (f4·8)
Winning blow: rook to d7 (d1·10)
Winning blow: rook to e4 (f4·2)
Attack on the uncastled king: queen to g8 (g7·2)
Winning blow: bishop to f3 (e2·2)
Winning blow: bishop to c5 (f2·2)
Winning blow: queen to c6 (g6)
Attack on the uncastled king: rook to c4 (b4)
Winning blow: queen to b7 (f3·3)
Attack on the uncastled king: rook to g7 (g3)
Winning blow: knight to f6 (g4·7)
Winning blow: queen to c8 (g8·2)
Winning blow: knight to b5 (d4·2)
Winning blow: queen to c7 (c3·3)
Attack on the uncastled king: queen to c3 (b2)
Attack on the uncastled king: knight to f6 (h5·3)
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