Sicilian Defense Keres Variation Puzzle (Rated 1237): Crush Discovered Attacks — Decisive Material Gain

This middlegame puzzle shows a classic discovered-attack idea in the Sicilian Defense. Black’s active pieces coordinate against White’s king side, and the key tactical point is that one forcing move opens the line for the queen while creating a direct check. White’s bishop and rook placement make the position tactically fragile, so the attack is not just about activity — it wins material by exploiting an overloaded defender and a trapped piece.