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.

The signal

Are both targets on one diagonal? Is there a square on that line from which a bishop attacks both, and is that square usable? You mark pairs with the same shape language as other fork habits, or draw the diagonal arrow in the tutorial flow.

Why it is easy to miss in a game

Diagonals open when pawns move. Two pieces that were not “on a bishop” last move suddenly are. You look at knights because knight forks are famous. A quiet pawn to e3 or …b5 can create the fork you will only see after the bishop lands.

What WayChess trains

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: knight fork and queen attack.

See all habits.