-- Select --   Advanced Checkmates Alekhine's Gun Attacking Castled King Back Rank Basic Checkmates Battery Bishop Pair Clearance Sacrifice Decoy / Deflection Defense Desperado Discovered Attack Discovered Check Double Check Doubled Rook En passant Endgame Tactics Exchange Sacrifice Fastest Checkmate Fianchetto Fork / Double Attack Hanging Piece Interference Knight Outpost Mate in 1 Mate in 2 Mate in 3+ Mating Net Opposite Colored Bishops Opposition Overloading Passed Pawns Pawn Endgame Perpetual Check Pin Promotion Queen Sacrifice Remove the Defender Rook Endgame Rooks on Seventh Scholar's Mate Simple Simplification Skewer Smothered Mate Stalemate Trapped Piece Two Bishops Checkmate Two Rooks Checkmate Underpromotion Vulnerable King Windmill X-Ray Attack Zugzwang Zwischenzug