The idea in one sentence
Black accepts a hole on d5 and a backward d-pawn in exchange for time, space and active pieces: dynamic play against a structural weakness.
♔ White's plans
- Use the d5 outpost, ideally for a knight
- Bring the stray knight from a3 back via c2 to e3
- Keep Black's bishops quiet
♚ Black's plans
- Gain time by kicking White's knights with ...e5 and ...a6
- Play ...f5 to attack the centre
- Use the bishop pair and the queenside pawns
Pawn structure. Black's pawns on e5 and d6 leave d5 weak, but they control the centre squares d4 and f4.
How to learn it
- Read the idea and the plans: every move below serves one of them.
- In the story, ask of each move: what does it do, what does it stop, what does it prepare, why not the other one?
- Drill your side. At the key moves you name the idea first, then play the move.
- Missed moves come back first next time, and in your journal.
The defining moves
- 5...e5 kicks the knight and claims the centre, giving up d5.
- 6.Ndb5 eyes d6, the weak spot behind Black's pawns.
- 6...d6 covers d6.
- 7.Bg5 pins the knight that controls d5.
- 7...a6 drives the knight from b5.
- 8...b5 keeps the knight on a3 offside by taking b5 and c4 from it.
The line follows the moves masters play most (Lichess masters database), each checked by Stockfish 19 at depth 22; where the book move is not Stockfish's first choice, the story says so. Scores are in pawns from White's side: +0.30 is good for White, −0.30 for Black.