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Prophylaxis: what does my opponent want?

Level: Class C (1400–1600)Topic: Thinking process35 minutes

In short

” Then you either stop that idea or make sure your move does not allow it. Many strong moves are simply the prevention of the opponent’s best plan.

By the end you can

The lesson

Prophylactic thinking means asking “what would my opponent play if it were their move?” Then you either stop that idea or make sure your move does not allow it. Many strong moves are simply the prevention of the opponent’s best plan.

Prophylaxis is not passivity. Preventing counterplay often makes your own plan unstoppable, because the opponent runs out of useful moves.

Key points to remember

Examples

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Example 1 (White to move). The opponent threatens something big. Prevent it. (Lichess puzzle 0UcXP, rated 1513)
Show the solution

35. Rxh6+ Ke7 36. Rxd6 Kxd6 37. Kf5

Practise it

Solve puzzles on this idea: defensive move puzzles, quiet move puzzles.

Homework

In two games, write the opponent’s best idea every 5 moves.

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