Chess Pieces That Move Diagonally: A Complete Guide

New players usually spend their first few games mixing up the bishop and the rook, and it’s the diagonal-only rule that trips them up. Three pieces touch diagonal squares at all, and each one uses the diagonal for a different job: the bishop lives on it, the queen adds it to an already long list of options, and the pawn only sees it when there’s something to capture.

The bishop: the pure diagonal piece

The bishop is the piece people associate with diagonal movement because it can only move that way. Each side starts with two: one that begins on a light square, one on a dark square, and neither ever switches. A dark-squared bishop stays a dark-squared bishop until it’s captured.

Rules for the bishop:

• It moves any number of squares diagonally, in a straight line.
• It can’t jump over other pieces.
• It never changes the colour of square it sits on.
• It captures the normal way, by landing on the enemy piece’s square.

Because of that colour lock, strong players talk about the “wrong-coloured bishop” in the endgame, a bishop that can’t reach the squares where the pawns or the action actually are. A bishop on light squares is dead weight if all the play is happening on dark ones.

The queen: diagonal, plus everything else

The queen moves diagonally like a bishop and in straight lines like a rook, which is why it ends up doing most of the damage in a typical game.

• It moves any number of squares diagonally, same as a bishop.
• It isn’t locked to one colour. Every diagonal move flips the colour of square it’s standing on.
• It can go diagonal one turn and straight the next, no restriction either way.

The pawn: diagonal only when there’s something to take

Pawns are the odd one out here, because their diagonal move only exists to capture.

• A pawn takes an enemy piece by moving one square diagonally forward, never backward.
• En passant lets a pawn capture an enemy pawn that just advanced two squares past it, treating that pawn as if it had only moved one. The capturing move itself is still just a single diagonal step.
• A pawn can’t move diagonally onto an empty square. If there’s nothing to capture, it just doesn’t have that option.

Diagonal movement, piece by piece

Piece	Can move diagonally?	Restriction
Bishop	Yes, exclusively	Any number of squares; stays one colour
Queen	Yes, and straight lines	Any number of squares; no colour lock
Pawn	Yes, captures only	One square forward-diagonally; not to empty squares
King	Yes, one square	One square in any direction, including diagonal
Knight	No, L-shape move	Jumps in an L, not a diagonal line
Rook	No	Horizontal and vertical only

The king moves diagonally too

People forget this because the king rarely goes anywhere. But one square diagonally is a legal king move, same as one square in any other direction, and in a king-and-pawn endgame that diagonal step is often the difference between catching a passed pawn and watching it queen.

Why any of this matters at the board

Two bishops together, one on each colour, cover every square on the board between them. That’s the “bishop pair,” and it’s a real advantage in open positions with long diagonals. A single bishop, on the other hand, can be worse than a knight once the position closes up and its diagonals get blocked by pawns.

Spotting which diagonals an opponent’s bishop or queen controls is also just basic board awareness. Miss it and you walk into a pin or a discovered check that a rook or knight could never have set up.