chess defense
chess manoeuvre to prevent or deflect attacks
artificial castling
chess maneuver in which a king which has lost the right to castle achieves a castled position in several normal moves, instead of the one special move
fortress
endgame drawing technique in which the side behind in material sets up a zone of protection that the opponent cannot penetrate
blockade
placement of a piece directly in front of an enemy pawn, where it obstructs the pawn's advance, and hinders the movements of the other enemy pieces
redundant defense
chess defense in which the number of defending pieces exceeds the number of attackers