Rauf Mamedov (Black) Puzzle: Perpetual Check — Draw
Perpetual check is a defensive resource that forces the opposing king to respond repeatedly, preventing progress and securing a draw. In this chess endgame, White has a queen against a rook but cannot convert the material advantage because the queen is restricted and vulnerable to rook checks. Black’s active rook keeps checking from changing squares, creating a repeating cycle. The key idea is to value king safety and continuous checks over material, recognizing when an apparently winning position is actually a theoretical draw.