Pieces & Activity
What is a diagonal in chess?
- Pieces
- Activity
- Coordination
Diagonal is a piece-play concept: a line of squares of the same color touching corner to corner, along which a queen or bishop moves. Ask whether the piece is active, coordinated, and serving a real plan.
What to look for on the board
- Your least active piece.
- Open lines and strong squares.
- Whether pieces coordinate on the same target.
Free game review
See where diagonal decides your games
Chessiro reviews your games with an AI coach that names the concept behind every mistake, then drills you on the exact positions where it happened until you stop repeating them.