What is a Rook?

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nicholasemtage

Everyone tells me I should use my rooks more but I don't know what those are please help!!!

ChessWithTheAngelOfDeath

rook is the tower piece 

MarioParty4

Rooks are one of the most powerful pieces in the game. They move left, right, up or down. You can use them to do something known as castling. You can learn about castling here.

DayanMatos

Those are the corner's pieces, their values are 5

Sadlone

They are the castles, look like towers, very good for killing pawns but sometimes lose against 2 or 3 pawns

ShauryaKrishna

up and down right and left

Mrmopo
The one that looks like the rook
ReFrostByte

Your rooks are the castle pieces that can move orthogonally. Their starting positions are usually on the corners of the board