Piece value

Piece value lets players compare material, meaning the pieces and pawns each side still has. The usual unit is one pawn. These numbers are not part of the rules and do not decide the game, but they provide a practical starting point for evaluating captures and piece exchanges.

Conventional values

• Pawn: 1 point.
• Knight: 3 points.
• Bishop: 3 points.
• Rook: 5 points.
• Queen: 9 points.

Conventional reference

Five points in two forms

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The rook sets the five-point baseline used to compare Black's group.

A material baseline

The white rook provides the conventional five-point reference. The black bishop and the pawns on a6 and h6 add up to three plus one plus one, also five. The kings are not part of that count.

1. The rook sets the five-point baseline used to compare Black's group.
2. A different combination of bishop and two pawns reaches the same baseline.
3. Kings are not treated as exchangeable material.

The king has no exchange value because it cannot be captured. When attacked it must escape check, and the game ends with checkmate. Its importance is absolute, although in the endgame it also acts as a mobile and active piece.

The values are relative. In an open position, a bishop may exploit long diagonals; in a blocked structure, a knight may have better routes. A rook without files, an exposed queen, or a trapped piece may perform below its nominal figure. Piece improvement, meaning relocating a piece to make it more useful, king safety, pawns, and threats all change the practical evaluation.

Same piece, different activity

Two knights, opposite mobility

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e5 has eight legal jumps; a8 has none because b6 and c7 are occupied by its own pieces.

Nominal value does not show the routes

Both sides have one knight and two pawns. The white knight on e5 reaches eight destinations, while the black knight on a8 has only two on-board destinations, b6 and c7, and both are occupied by its own pawns. The nominal figure is equal; immediate usefulness is not.

1. e5 has eight legal jumps; a8 has none because b6 and c7 are occupied by its own pieces.

When calculating an exchange, count the material but also inspect the resulting position. Two combinations with the same point total may have very different mobility, coordination, and attacking chances.

Same total, different functions

Six points with different jobs

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The bishop uses diagonals and supports e4; the central knight covers eight jumps. Together they total six.

The sum does not describe function

The bishop on c2 and the knight on e4 total six points and divide their activity between diagonals and central jumps. The rook on d8 and the pawn on a5 also total six, but work through pressure on the d-file and the advance to a4. The arithmetic matches; the functions do not.

1. The bishop uses diagonals and supports e4; the central knight covers eight jumps. Together they total six.
2. The rook presses on the d-file, and the pawn retains a4 as an advance. They also total six.