Réti Opening: Advance Variation – Playing as Black

Your early ...d5-d4 advance stakes a claim in the centre and takes away the natural squares e4 and c4 from White's knights and bishops. The resulting pawn structure is asymmetrical — White has a pawn on c4 and a knight on f3, while you have a central pawn on d4 that can be hard to assault directly. Your main goals are to keep the d4 pawn healthy, develop your pieces efficiently, and watch for White's attempts to undermine it with moves like b4 or e3. Because the position is balanced, small inaccuracies matter more than usual: a slightly misplaced piece or a wasted tempo can shift the evaluation noticeably.

The engine's top choice is b4, aiming to expand on the queenside and challenge your control of the light squares. After b4, the suggested continuation runs b4 f6 e3 e5. White plays e3 to chip away at your d4 pawn, and your ...f6 and ...e5 shore up the centre while preparing development. Notice how White is trying to force you to commit — your ...f6 is a solid if slightly passive way to keep the pawn chain intact. In practice, b4 scores 54.0% for White in 109,592 games, which makes it White's most effective move in terms of winning percentage. As Black, you should expect this line and be ready to hold the centre without overextending.

The most-played move in the position is e3, seen in 181,627 games. White immediately attacks your d4 pawn. You need to decide whether to capture, defend, or push. While the engine line after b4 uses ...e5 to reinforce, after e3 you have several reasonable setups. The key is not to panic: your d4 pawn is a strength, not a weakness, as long as you support it correctly. White scores 52.4% after e3, so it's a solid try for them, but you are by no means worse — the evaluation remains nearly level. Develop your pieces to natural squares (…Nc6, …Bf5 or …Bg4, …e6) and be ready to recapture if White takes on d4.

Not every White move is accurate. The statistics flag two inaccuracies you can exploit. b3 (19,385 games, White scores only 44.7%) loses about 1.0 pawns of advantage according to Stockfish — the engine says b4 was better instead. b3 weakens White's queenside pawn structure and does little to challenge your centre. e4 (14,947 games, White scores 48.2%) loses about 0.7 pawns. By pushing e4, White creates a target on e4 that you can attack with …f5 or …Nc6 and …Bf5. In both cases, your job is to seize the initiative: increase the pressure on White's centre, complete your development faster, and look for chances to open the position when you're better mobilised.