Learn How to Use an Intermezzo: Decisive Material Gain
This puzzle is a classic middlegame intermezzo: instead of recapturing or defending in a routine way, Black inserts a forcing check that changes the whole position. The key idea is king safety. White’s kingside is loosened, the queen and bishop can coordinate against the exposed king, and the attack arrives with tempo. In classical chess, these forcing moves often outweigh material, especially when the opponent’s pieces are awkwardly placed and the king has few safe squares.