WAlekhine's gun
WBack-rank checkmate
WBattery (chess)
WBlock (chess)
WCastling
WClearance sacrifice
WDeflection (chess)
WDiscovered attack
WFork (chess)
WInterference (chess)
WQueen sacrifice
WRéti endgame study
WSacrifice (chess)
WSmothered mate
WUndermining (chess)