Chess960 puzzles: Only move
Everything else loses — find the only move that holds.
6689 puzzles
Attack on the uncastled king: king to e2 (d1·6)
Winning blow: king to c2 (b1·6)
Winning blow: king to e2 (e1·11)
Winning blow: king to a3 (b3)
Winning blow: king to c2 (d1·11)
Winning blow: king to d1 (e1·10)
Winning blow: king to b1 (c2·3)
Winning blow: pawn to c8
Winning blow: king to a2 (b1·17)
Winning blow: king to f2 (g1·8)
Winning blow: king to h2 (g1·17)
Winning blow: king to a1 (b1·12)
Winning blow: king to h3 (g2·2)
Attack on the uncastled king: king to g2 (f2)
Attack on the uncastled king: knight to f2 (d1·3)
Winning blow: king to e1 (d1·11)
Winning blow: knight to d2 (f1)
Winning blow: bishop to e3 (g5)
Winning blow: king to g2 (h1·3)
Winning blow: pawn to b3 (b2·4)
Winning blow: king to c2 (d1·13)
Winning blow: king to g2 (g1·6)
Attack on the uncastled king: knight to c2 (e1·4)
Winning blow: rook to f5 (e5)
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