Bishop and pawn versus knight ending

In a bishop and pawn versus knight ending, the bishop's side has an extra pawn and tries to promote it, meaning advance it to the last rank and turn it into another piece. The defender aims to blockade it with the king or knight and, if necessary, give up the knight for the pawn. Material advantage alone does not decide the result.

An important defensive setup occurs when the king stands in front of the pawn on a square of the color the attacking bishop can never control. Because a bishop remains on one color of square throughout the game, it cannot drive that king away by itself. If the defending king arrives in time or remains sufficiently close, the ending may be drawn.

The attacker tries to bring the king in front of or beside the pawn, use the bishop to restrict the knight, and advance without allowing a stable blockade. The defender coordinates king and knight to attack the pawn's route, give timely checks, and prepare to sacrifice the knight for the pawn. A knight can be an effective blockader because it may occupy a square in front of the pawn without moving along the pawn's lines.

The side to move can reverse the evaluation: in nearly identical positions, moving first may win or may allow a draw. General guidance therefore needs confirmation by concrete calculation or an endgame tablebase, a database that knows the exact result of positions with few pieces. This ending belongs to endgame theory and should not be judged only by the usual relative values of bishop and knight.