ChessWorld.net, founded in 2000, is an online chess site. Play relaxed, friendly correspondence-style chess — with online daily, turn-based games — at your own pace.

Raging Rook Challenge – Max Control Chessboard Vision Trainer

The Raging Rook Challenge is a specialized vision trainer designed to improve your awareness of lines and files. Your goal is to place a single Rook on the square where it exerts maximum control over the board. This exercise sharpens your geometry and planning, helping you place your heavy pieces on the most active squares in real games.