The rook moves in a straight line, horizontally or vertically. The rook may not jump over other pieces, that is: all squares between the square where the rook starts its move and where the rook ends its move must be empty. (As for all pieces, when the square where the rook ends his move contains a piece of the opponent, then this piece is taken. The square where the rook ends his move may not contain a piece of the player owning this rook.)
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