Learn How to Spot a Mate in 1: Tactical Refutation
This puzzle comes from a sharp middlegame in the Reti Opening, where king safety matters more than material count. Even though White has the better material balance, the position is tactically lost because the black queen can deliver immediate checkmate. The key lesson is that a seemingly active piece can become decisive when it lands on a square that attacks the king and cannot be captured or blocked. Always scan forcing moves first, especially checks.