Walking into a bishop diagonal

Walking into a bishop diagonal is a move that places the moved piece where a bishop could fork it together with another of your pieces on the same diagonal. The check is to see that pair *before* you let go of the piece. Kings, queens and rooks always count; knights, bishops and pawns only if they are undefended.

Why you should notice it

Diagonals open when pieces slide. The two pieces were not on a bishop a move ago. You chose the move for development, a recapture, or a check.

When to check it

This is a blunder check. An orange arrow shows the candidate. Ask: after that piece lands, are it and another same-colour piece on one diagonal a bishop could attack from one square? You also train the opponent’s move walking into the same motif.

Bishop diagonal scans the current position. This habit asks whether *this move* creates the pair.

Why players miss it during games

Bishop-diagonal puzzles usually start after the blunder, with the bishop already almost there. WayChess trains the moment the motif is created.

How WayChess trains it

You draw the post-move bishop-diagonal pair (destination plus partner) without playing the move, then get feedback. If there is no pair, submit without drawing.

Related checks

Bishop diagonal is the current-position scan. Walking into a knight fork and walking into a rook attack are the same idea on other geometries.

See all habits.