Bishop diagonal

The bishop-diagonal habit (bishop fork) is two opponent pieces on the same diagonal such that a bishop could attack both from a square on that diagonal. High-value pairs — queen, king, rook — are especially important.

Why you should notice it

Diagonals open when pawns move. Two pieces that were not “on a bishop” last move suddenly are. If you only look for knight forks because they are famous, you miss the quiet pawn to e3 that creates the bishop’s shot.

When to check it

During threat assessment, can *their* bishop fork two of yours? While finding a move, can *yours* fork two of theirs? The blunder-check version is walking into a bishop diagonal.

Why players miss it during games

You look at knights. A quiet pawn move opens the line. Bishop-diagonal puzzles usually start after the bishop is already almost there.

How WayChess trains it

You identify valid bishop-fork pairs and the fork square, with feedback when the diagonal is blocked or the square is unsafe when it needs to be.

Related checks

Knight fork and rook attack are the same idea on other geometries. Walking into a bishop diagonal trains the candidate move that creates the pair.

See all habits.