Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Winning blow: bishop to c2 (e4)
Attack on the uncastled king: pawn to c3 (c2)
Winning blow: king to c1 (d1·8)
Winning blow: king to d3 (e2·5)
Winning blow: king to f3 (e2·3)
Attack on the uncastled king: king to f1 (e1·9)
Winning blow: king to f2 (e2·6)
Winning blow: king to b1 (b2·2)
Winning blow: pawn to c3 (c2·5)
Winning blow: king to e2 (d2·3)
Attack on the uncastled king: king to d1 (d2·2)
Winning blow: rook to e2 (e1·2)
Winning blow: king to g2 (g3·2)
Winning blow: bishop to b2 (c1)
Winning blow: king to e2 (f1·10)
Winning blow: king to f1 (e2·2)
Attack on the uncastled king: knight to d3 (c5)
Winning blow: king to e3 (d2·4)
Winning blow: knight to f2 (d3·3)
Winning blow: king to h3 (h2·2)
Winning blow: rook to f3 (f1·4)
Winning blow: king to b1 (c1·14)
Winning blow: king to c1 (d1·10)
Winning blow: king to g1 (f1·17)
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