strategy · recognise → explain → apply

Prophylaxis: ask what the opponent wants

Prevent a useful plan while improving your own position.

Explanation styleChoose any style. Age is not playing strength; no birth date is needed.

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Notes and replay positions are saved. Practice games are temporary; export their PGN to keep them.

Choose an example

Ossip Bernstein – Jacques Mieses

Event not established · 1921.??.?? · 1-0

16... Nxd6 · White to move

Jump to move

What to notice at 16... Nxd6

White's f4 controls e5, making Black's freeing ...e5 subject to capture. Follow the king's route once the terrain is restrained.

A legally replayed historical example, not a claim that every move is best. A game’s result does not prove every defensive position was lost or drawn.

Game source ↗

Your thinking first

Name the signal, choose a plan, and test the opponent’s most challenging response.

What do you notice?What is your plan, and why?How could the opponent resist?

Recall and explain

1. Must every opponent plan be prevented?

Explain it in your own words before revealing.

2. Why can a pawn move be risky as prevention?

Explain it in your own words before revealing.

3. How do you explain a prophylactic move precisely?

Explain it in your own words before revealing.

Make it memorable

Their wish, my answer, my gain.

Teach this to a friend in one minute. Then return to a different example and look for the same signal without being told its name.

Reflect and revisit

This is your self-assessment, not an engine grade or a promise of mastery.

Connect the ideas

Sources and further reading

Original LumaChess teaching and game analysis. Topic references are credited below; no affiliation or endorsement is implied.

strategy · recognise → explain → apply

Prophylaxis: ask what the opponent wants

Prevent a useful plan while improving your own position.

Explanation styleChoose any style. Age is not playing strength; no birth date is needed.

Loading progress…

Notes and replay positions are saved. Practice games are temporary; export their PGN to keep them.

Choose an example

Ossip Bernstein – Jacques Mieses

Event not established · 1921.??.?? · 1-0

16... Nxd6 · White to move

Jump to move

What to notice at 16... Nxd6

White's f4 controls e5, making Black's freeing ...e5 subject to capture. Follow the king's route once the terrain is restrained.

A legally replayed historical example, not a claim that every move is best. A game’s result does not prove every defensive position was lost or drawn.

Game source ↗

Your thinking first

Name the signal, choose a plan, and test the opponent’s most challenging response.

What do you notice?What is your plan, and why?How could the opponent resist?

Recall and explain

1. Must every opponent plan be prevented?

Explain it in your own words before revealing.

2. Why can a pawn move be risky as prevention?

Explain it in your own words before revealing.

3. How do you explain a prophylactic move precisely?

Explain it in your own words before revealing.

Make it memorable

Their wish, my answer, my gain.

Teach this to a friend in one minute. Then return to a different example and look for the same signal without being told its name.

Reflect and revisit

This is your self-assessment, not an engine grade or a promise of mastery.

Connect the ideas

Sources and further reading

Original LumaChess teaching and game analysis. Topic references are credited below; no affiliation or endorsement is implied.