what is the rook chess piece
The rook is a valuable piece. Its value on the board is bigger than that of the pawn, the bishop and the knight but smaller than that of the queen. At the beginning of the game the rooks are placed in the corners of the board just like in the following image.
Read The Little Pawn a children's story about chess. The rook, shaped like a castle, is one of the more powerful pieces on the board. The rooks, grouped with the queen, are often thought of as the major pieces. A rook may be thought of as being worth a bishop (or a knight) plus two pawns. However, it will be seldom that such an obvious trade will be practical.