Nimzo Larsen Attack Fork Beginner Puzzle (Rated 1076): Win a Fork — Tactical Refutation
This middlegame puzzle is built around a forcing tactical refutation where a single check creates a fork and exposes loose pieces. The side to move has active pieces and a vulnerable enemy king, so the key is to use tempo to drive the king into an awkward square while simultaneously attacking a valuable target. In classical chess, these moments often decide the game by converting activity into material gain rather than a direct mating attack.