Endgame · advanced

Bishop + Knight Mate

The hardest basic mate: you can only mate in a corner of your bishop's color.

touch_appPlay it out against Stockfish. You have 35 moves; a move that throws the win away is caught and explained.

The task

The hardest basic mate: you can only mate in a corner of your bishop's color.

Checkmate
Goal
White
You play
35 moves
Move limit

Technique

  1. 1You have a light-squared bishop, so the mating corners are a8 and h1 (light squares).
  2. 2The knight covers the squares the bishop can't (opposite color).
  3. 3Use the 'W' knight manoeuvre to herd the king along the edge.

How the pieces work together

Bishop and knight cover opposite colors, and the king seals the rest. All three pieces must cooperate.

If you get stuck

Your bishop is light-squared, so mate must happen on a8 or h1. Drive the king toward a8.