The Bishop Chess Piece — Diagonals, Value & Strategy

How the Bishop Moves

The bishop moves diagonally in any direction — forward, backward, left, or right along the diagonals — and may travel any number of squares in a single move. Like the rook and the queen, the bishop is a sliding piece: it cannot jump over other pieces, and any piece blocking its path stops it cold. This means that in a congested position the bishop may be hemmed in and almost useless, while in an open position it can dominate the board from a single square.

Each player begins the game with two bishops, placed on c1 and f1 for White, and c8 and f8 for Black. One bishop starts on a light square, the other on a dark square. That opening placement determines the colour each bishop will occupy for the rest of the game.

Colour Binding — The Bishop's Greatest Characteristic

Because the bishop always moves diagonally, it always moves from a square of one colour to another square of the same colour. A bishop starting on a light square will, without exception, remain on light squares forever. This is called colour binding, and it is the most important thing to understand about the bishop.

Colour binding is both a limitation and a source of identity. The light-square bishop and the dark-square bishop are, in a real sense, two different pieces with different responsibilities. When a player loses the bishop that covers the dark squares, all the dark squares on the board become permanently inaccessible to their bishop. An opponent with the surviving dark-square bishop can exploit those squares with near impunity. This is why grandmasters pay close attention to which bishop they are trading away, and at what point in the game they do so.

Value of the Bishop: Three Pawns

In standard piece-value tables, the bishop is worth approximately three pawns, the same as a knight. The bishop and the knight are considered minor pieces, as opposed to the major pieces — the rook (five pawns) and the queen (nine pawns). In practice, the bishop tends to outperform the knight as the position opens up, because its long-range diagonal movement becomes increasingly powerful when there are fewer pawns clogging the centre. In closed, blocked positions, the knight's ability to jump over pieces often makes it the superior minor piece.

The relative value of bishop versus knight is one of the most debated topics in chess strategy and is highly dependent on pawn structure, the number of pawns on the board, and whether the position is open or closed.

The Bishop Pair Advantage

One of the most significant strategic concepts in chess is the bishop pair: having both your bishops while your opponent has surrendered one or both of theirs. Two bishops working together cover all 64 squares of the board, light and dark alike, and in an open endgame or middlegame they can be a formidable fighting unit.

The bishop pair is generally considered worth between a quarter and half a pawn of additional value over a bishop and knight, or over two knights. World Chess Champions from Wilhelm Steinitz onwards have consistently fought to obtain or preserve the bishop pair, and it remains one of the key objectives in modern grandmaster play. The advantage grows as pawns come off the board and the long diagonals open up. In contrast, in positions with locked pawn chains and many pieces still on the board, the bishop pair advantage shrinks and knights may hold their own.

Good Bishop and Bad Bishop

A good bishop is one that operates on squares of a different colour from its own pawns, leaving the diagonals unobstructed. A bad bishop is one blocked by its own pawns, which stand on the same colour squares as the bishop and reduce its range to almost nothing. The bad bishop is one of chess's most instructive positional concepts: a piece that is nominally worth three pawns but in practice contributes little because pawn structure has turned it into a large pawn itself.

Experienced players therefore think carefully before fixing their pawn structure. Advancing a pawn onto the same colour as your bishop, particularly in the centre, can permanently damage the bishop's effectiveness for the rest of the game. Strong players often exchange their bad bishops for the opponent's knight or good bishop to relieve this structural weakness.

The Fianchetto

The fianchetto (from the Italian for "little flank") is a development technique in which the bishop is placed on the long diagonal by moving a flank pawn one square and then placing the bishop on the vacated square — for White, typically on g2 or b2, and for Black on g7 or b7. A fianchettoed bishop on g2 commands the entire a8-h1 diagonal, exerting pressure across the centre and both wings simultaneously. Many of the most important chess openings, including the King's Indian Defence, the Grunfeld, and the Catalan, are built around fianchettoed bishops.

A fianchettoed bishop is often described as a "dragon bishop" when it sits on g7 behind the castled king. The fianchetto structure has both strengths and vulnerabilities: the bishop is powerful, but if it is exchanged, the light or dark squares around the king can be permanently weakened.

The Bishop in the Endgame

Same-coloured bishop endgames — where both players have a single bishop, each covering the same colour squares — are among the most drawish endings in chess. If neither player can create a passed pawn on the correct colour, the position will often be held by the defending side regardless of material advantage. A player can be two or even three pawns ahead in a same-coloured bishop endgame and still be unable to win.

Opposite-coloured bishop endgames, by contrast, are often decisive in the middlegame (when other pieces are present) but drawish in pure endgames: the attacking bishop cannot drive the defender's bishop off the key squares because they operate on entirely different coloured diagonals. Understanding these endgame principles is essential for any serious student of chess, as they affect how players manage their pawn structure and piece exchanges throughout the entire game. For more on endgame technique, see our guide to chess tactics.

History of the Bishop: From Elephant to Churchman

The bishop was not always a bishop. In the original game of chaturanga, the ancestor of chess that arose in India around the 6th century AD, the piece was called the fil or alfil, meaning elephant. The elephant moved in a very different way — jumping two squares diagonally — and was considered a relatively weak piece.

As chess spread westward through Persia and into the Islamic world and then into medieval Europe, the pieces were reinterpreted to fit local culture and religious life. European players could not easily relate to the concept of a war elephant, and over time the piece was reimagined as a court official or, in most of Europe, as a bishop of the church. In France the piece became the fou (jester); in Germany it is the Läufer (runner). The English and most of the chess-playing world settled on "bishop," a name that perfectly suited the Staunton design that would follow in the nineteenth century.

For a broader history of the game, see our complete history of chess.

The Staunton Bishop: Jaques of London's Mitre Design

When Nathaniel Jaques designed the Staunton chess set in 1849, he gave the bishop a form that immediately communicates its ecclesiastical identity: a mitre, the tall pointed liturgical hat worn by Christian bishops. The Staunton bishop is a rounded, upright piece tapering to a point, and it carries a distinctive diagonal cut or notch across the top of the mitre. This notch is the bishop's fingerprint in a Staunton set, instantly distinguishing it from other tall pieces.

Jaques of London, the company that produced the original 1849 Staunton set and has been making chess sets ever since, has maintained this design through every generation of their sets. The notch in particular has remained a constant feature, and in high-quality Jaques sets it is cleanly and precisely cut to reflect the craftsmanship of the original. The Staunton design is the official standard for tournament chess worldwide, and the bishop's mitre has been part of that standard since the very beginning.

Frequently Asked Questions

Q: How does a bishop move in chess?

The bishop moves diagonally in any direction — forward, backward, and to either side along the diagonals — and can travel any number of squares in a single move. It cannot jump over other pieces; any piece in its path blocks it. Because every diagonal move takes the bishop between squares of the same colour, the bishop is permanently bound to either the light squares or the dark squares throughout the entire game.

Q: What colour does the bishop stay on?

Each player starts with two bishops: one on a light square and one on a dark square. The light-square bishop will remain on light squares for the entire game; the dark-square bishop will remain on dark squares. This is called colour binding. If you lose the dark-square bishop, your opponent's pieces can occupy dark squares around your position without any risk of being challenged by your bishop. This is why trading bishops is a strategic decision that must be made carefully, not automatically.

Q: What is the bishop pair advantage?

The bishop pair means having both your bishops while your opponent has only one bishop or none. Two bishops together cover all 64 squares of the board, giving them extraordinary range in open positions. Chess theory generally assigns the bishop pair a bonus of roughly a quarter to half a pawn above standard piece values, and the advantage becomes more pronounced as the game opens up and pawns are exchanged. Most grandmasters actively fight to preserve their bishop pair or win it from the opponent, particularly in positions where the centre is open or likely to become open.

Q: How do you recognise the bishop in a Staunton chess set?

In a Staunton chess set, the bishop is the piece modelled on a bishop's mitre — the tall, pointed ecclesiastical hat. Its identifying feature is a distinctive diagonal cut or notch across the top of the mitre. This notch has been part of the Staunton bishop design since Nathaniel Cook's original 1849 set, manufactured by Jaques of London. It distinguishes the bishop from the taller king (which has a cross on top) and the queen (which has a crown). In tournament and club play, players worldwide use the Staunton standard, so the notched mitre is immediately recognisable to any chess player.