Learn How to Mate in 2: Collinear Move Fork
This chess puzzle is a classic middlegame mating net built around a collinear move idea: one forcing move creates a line where the enemy king and a key defender are aligned. The position is especially instructive because the attacking side already has active pieces and the opponent’s king is exposed. In practical classical chess, these patterns often appear when a pinned piece or overloaded defender cannot meet a direct threat.