Chess960 puzzles: Relative pin
A piece shields a more valuable one behind it — moving it loses material.
511 puzzles
Mate in 1: rook to e8 (e1·8)
Mate in 1: queen to e6
Attack on the uncastled king: bishop to b2 (a1·7)
Attack on the uncastled king: bishop to d4 (a1·13)
Attack on the uncastled king: queen to d4 (a1·9)
Attack on the uncastled king: queen to f4 (c1·7)
Winning blow: rook to e2
Attack on the uncastled king: bishop to b2 (d4)
Winning blow: queen to f7 (h7)
Winning blow: queen to b5 (d3)
Winning blow: rook to h5 (c5)
Attack on the uncastled king: queen to f4 (f1·7)
Winning blow: rook to e6 (e1·3)
Winning blow: bishop to f3 (e2)
Winning blow: queen to c4 (a2)
Winning blow: queen to d4 (a1·2)
Winning blow: queen to b8 (h2)
Winning blow: queen to d5 (b3)
Attack on the uncastled king: rook to h4 (h1·20)
Attack on the uncastled king: rook to h8 (h7·3)
Winning blow: queen to g5 (e3·2)
Winning blow: rook to b6 (b3)
Winning blow: rook to d6 (d8)
Attack on the uncastled king: bishop to f4 (c1·28)
Tactics
BatteryCheck chaseClearanceDecoyDeflectionDiscovered attackDiscovered checkDouble checkWinning exchangeBishop forkKnight forkPawn forkQueen forkRook forkRoyal forkHanging pieceInterferenceOverloadAbsolute pinWin the pinned piecePromotionQueen trapQuiet moveRemove the defenderSacrifice attackSkewerTrapped pieceUnderpromotionWinning blowX-rayZwischenzug