The Rook
The rook has the simplest move in chess and the strangest property: it is the only piece that is exactly as powerful in the corner as it is in the middle. The boards below are where you check that for yourself.
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A rook moves in straight lines: along its rank, along its file, as far as it likes, stopping at the first piece in the way. That is the entire rule, and it is the easiest one in chess to learn.
Move it around the empty board and count what it can do from the middle.
One rook on d4 with the board to itself. Move it anywhere it may go.
Fourteen squares. Now the odd part: put that rook on a1, or h8, or anywhere else on an empty board, and it still reaches fourteen. Seven along the rank and seven along the file, always, because the two lines together always add up to the same fourteen squares however you slide the rook along them.
No other piece behaves like that. A knight drops from eight squares to two in the corner; a bishop from thirteen to seven; a queen from twenty-seven to twenty-one. The rook is the only piece that does not care where it stands - which is why it can be left in the corner at the start of a game without wasting it, and why "activate your rooks" is about opening lines, not about moving the rook itself.
What actually stops it
If where the rook stands does not matter, what does? What is standing in front of it. A rook is stopped by the first piece on the line - and there are two different stops, one square apart.
Stay on the d-file: tap every square this rook can reach going up or down it.
Say the two stops out loud, because the difference is worth a game one day:
| the first piece on the line is… | the rook can go |
|---|---|
| an enemy piece | up to and including its square - it captures and stands there |
| one of your own | up to the square before it |
Why rooks wake up late
A rook needs an open line and the opening has none. At move one it is buried in the corner behind its own pawns with no legal move at all, and it can stay that way for fifteen moves without anything being wrong.
Then pawns get traded, a file opens, and the rook that has done nothing all game lands on it and cuts the board in two. Two rooks doubled on an open file, or a rook on the seventh rank eating pawns sideways, are among the most decisive things in chess - and neither is available until the pawns move.
That is also what castling is for: it is the one move that tucks the king away and brings a rook towards the middle at the same time, which is why it is nearly always worth doing early.
It is a rook, not a castle
Everyone calls it a castle at some point, because it is carved as one. The proper name is rook, from an old Persian word for a chariot, and it is worth switching to for a practical reason rather than a snobbish one: castling is a real rule about this piece, and "castle the castle" is a sentence nobody can follow.
Try it
One black pawn on h4, four squares away along the rank. Take it.
Common questions
- How does a rook move in chess?
- In straight lines - along its rank or along its file, as far as it likes in one of four directions. It stops at the first piece in its path: an enemy piece it may capture and stand on, one of its own it must stop in front of. It never moves diagonally.
- Is a rook the same as a castle?
- It is the same piece, but the name is rook. Castle is a nickname that comes from the shape it is carved in, and it causes real confusion because castling is a genuine rule involving the rook and the king. Books, notation and every serious player say rook.
- What is a rook worth?
- About five points - more than a bishop or a knight at three, less than a queen at nine. Winning a rook for a bishop or a knight is called winning the exchange, and it is usually enough of an advantage to shape the rest of the game.
- Can a rook move diagonally?
- No. Diagonals belong to the bishop and the queen. A rook only ever changes its rank or its file, never both in the same move, which is also why a rook can reach every square on the board given enough moves while a bishop cannot.
- Why are rooks stronger in the endgame?
- Because they need open lines and the early board has none. At the start a rook is walled in behind its own pawns and does nothing. As pawns come off, files open, and a rook that reaches an open file or the seventh rank suddenly cuts the position in half.
- Does castling count as moving the rook?
- Yes - castling moves the king two squares and jumps the rook over it in the same move, and it is the only move in chess that shifts two pieces at once. It also means the rook loses the right to castle on that side the moment it moves for any other reason.
