David Howell (White) Puzzle: Repeat Checks — Check
A perpetual check is a drawing resource in which the attacking side repeatedly checks the opposing king until the position must recur. It is especially powerful when the defender has a material advantage but an exposed king and limited safe squares. Here, Black’s active queen and rook create sustained pressure around the white king, turning checking tempo into compensation. The goal is not a checkmate, but a forced repetition that prevents White from using its large material edge.