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B

B: Abbreviation for Bishop.

Back rank mate: A checkmate made by a Queen or Rook along the 8th rank where the opponent's King is blocked in by its own Pawns.

Backward Pawn: A Pawn that has trailed behind and is no longer supported by other Pawns.

Bad Bishop: When a Bishop has little or no mobility because of being hemmed by Pawns positioned on squares of the same colour as the Bishop's square, it is said to be a "bad Bishop".

Battery: Doubling Rooks on a file or a Queen and a Bishop on a diagonal.

BC E: Basic Chess Endings.

BC F: British Chess Federation.

BCO: Batsford Chess Openings , t he standard one volume reference book on opening strategy.

Bishop pair: Two Bishops vs. a Bishop and a Knight or two Knights.

Blindfold Chess: Games played without seeing the board.

Blitz Chess: Rapid or lightning chess games.

Blockade: To stop an enemy Pawn by placing a piece or pieces directly in front of it.

Blunder: A very bad move that loses material or initiative without any or little advantage.

Book: The written body of high-level chess play. "Book" moves are standard. A book player memorizes openings and their variants, and goes to pieces if his opponent strays from the accepted line.

Book (moves): A pattern of moves expected to be played based on theoretical manuals by Chess players.

Breakthrough: An infiltration to the opponent's position.