Chess960 puzzles: Royal fork
A fork with check: the king must move, and the second piece is lost.
3622 puzzles
Attack on the uncastled king: knight to d6 (e4·18)
Winning blow: queen to g7 (c3·2)
Winning blow: queen to h8 (b2·3)
Attack on the uncastled king: knight to f6 (e4·12)
Attack on the uncastled king: knight to c6 (a5·6)
Winning blow: bishop to d4 (e3·3)
Winning blow: queen to f4 (f2·4)
Attack on the uncastled king: queen to e5 (c3·4)
Attack on the uncastled king: rook to d1 (f1·5)
Winning blow: knight to c6 (b4·7)
Winning blow: pawn to b7 (c6·8)
Attack on the uncastled king: knight to e6 (d4·18)
Attack on the uncastled king: rook to b3 (h3)
Attack on the uncastled king: bishop to g5 (h4·8)
Winning blow: queen to h5 (h6)
Winning blow: queen to e6 (d7·2)
Attack on the uncastled king: bishop to g6 (c2·2)
Winning blow: knight to b5 (d6·5)
Attack on the uncastled king: rook to b8 (b1·18)
Winning blow: queen to b3 (e3)
Winning blow: queen to f8 (d6·2)
Winning blow: knight to c6 (b4·8)
Winning blow: knight to c6 (a5·6)
Winning blow: queen to g8 (g3·2)
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Tactics
BatteryCheck chaseClearanceDecoyDeflectionDiscovered attackDiscovered checkDouble checkWinning exchangeBishop forkKnight forkPawn forkQueen forkRook forkHanging pieceInterferenceOverloadAbsolute pinRelative pinWin the pinned piecePromotionQueen trapQuiet moveRemove the defenderSacrifice attackSkewerTrapped pieceUnderpromotionWinning blowX-rayZwischenzug