Learn How to Use an Intermezzo: Tactical Refutation
This puzzle is a classic opening tactical refutation in the Richter-Veresov Attack, where an in-between move changes the evaluation immediately. The key idea is to notice when a seemingly active white queen can be hit while Black also creates a forcing check. In classical chess, these moments often decide the middlegame early by winning material and disrupting development. The position rewards calculation, not general plans, because the tactical sequence is forcing and concrete.