Monorail Mate Puzzle (Rated 600): Win Material — Tactical Refutation
This puzzle is a classic chess endgame-style tactical refutation, even though the board still has several active pieces. Black’s position is built around piece activity and a loose white rook that can be punished immediately. The key idea is to notice when an apparently active piece is overextended and can be won by a forcing capture. In classical chess, these moments often decide the game at once because material and coordination matter more than long-term plans.