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an extra rook is helpful in the "threshold" case, but not otherwise (because two rooks fighting against a queen benefit from the ability to defend each other, but minor pieces against a rook need a rook's help more than the rook needs the help of another rook);
The rook is worth about five pawns. In general, rooks are stronger than bishops or knights and are considered greater in value than either of those pieces by nearly two pawns, but less valuable than two minor pieces by approximately a pawn. Two rooks are generally considered to be worth slightly more than a queen (see chess piece relative value ...
A chess piece, or chessman, is a game piece that is placed on a chessboard to play the game of chess.It can be either white or black, and it can be one of six types: king, queen, rook, bishop, knight, or pawn.
With the exception of the knight, each piece is abbreviated as the first letter of its name: K for king, Q for queen, R for rook, B for bishop, and P for pawn.As knight begins with the same letter as king, it is abbreviated as either N or Kt, the first being the modern convention.
In chess, the exchange is the material difference of a rook for a minor piece (i.e. a bishop or knight). Having a rook for a minor piece is generally advantageous, since the rook is usually more valuable. A player who has a rook for a minor piece is said to be up the exchange, and the other player is down the exchange.
The rook mate is one of the four basic checkmates. It occurs when the side with the king and rook box in the bare king to the corner or edge of the board. The mate is delivered by the rook along the edge rank or file, and escape towards the centre of the board is blocked by the king.
In graph theory, a rook's graph is an undirected graph that represents all legal moves of the rook chess piece on a chessboard. Each vertex of a rook's graph represents a square on a chessboard, and there is an edge between any two squares sharing a row (rank) or column (file), the squares that a rook can move between. These graphs can be ...
The squares = .314 each times 64 = 20.096 One queen, one rook, one bishop, one knight, and one pawn = 20.410. The difference between 20.410 and 20.096 is .314 Please contact me and help me add this information to the Chess piece relative value page or help me create the Chess piece potential value page.