Prophylaxis (Preventing Their Plan): chess middlegame concept

Stop the opponent’s useful next move.

Before choosing a plan, identify what your opponent wants to do. A move can prevent a pawn break, deny a piece square or protect an important target. Explain the specific move being prevented and what that gives you time to do.

• Identify the opponent’s threat or plan.
• Check whether stopping it is worth a move.
• Improve your position while limiting the opponent’s play.