Checkmate with Bishop & Knight

The Checkmate with Bishop & Knight is a checkmate endgame involving K+B+N vs K. The most difficult basic checkmate. The king must be driven to a corner that matches the bishop's color. The W-maneuver (or triangle technique) forces the king from the wrong corner to the right one. This takes up to 33 moves with perfect play — cutting it close to the 50-move rule. Many strong players have failed to deliver this checkmate under time pressure.

The key concept in the Checkmate with Bishop & Knight is: Drive king to correct corner. Understanding this principle is more important than memorizing exact move sequences — once you grasp the underlying idea, you can navigate the position even when the move order varies slightly from the textbook line.

Basic checkmating patterns like the Checkmate with Bishop & Knight are non-negotiable for serious chess study. You will reach these positions repeatedly across blitz, rapid, and classical play — failing to convert a winning endgame to mate is one of the most common rating-loss patterns at the club level. Drill the technique until it is automatic.

Set up the K+B+N vs K position on a real or virtual board and play it out against an engine or a training partner. Once you can win or hold the position consistently from the textbook setup, try harder starting positions where you have to find the right plan from scratch. For free engine feedback on your endgame technique with no signup or daily limit, use chess.rodeo — paste your endgame position FEN and Stockfish will show you the optimal line.

Use chess.rodeo for full Stockfish analysis of any checkmate endgame — no account required, no daily cap, no paywall. Paste the PGN of a game where you reached this endgame and the engine will show exactly where the position was won, drawn, or lost. This is faster and more direct than reading a textbook because it grades your actual decisions in your own games.