Chessy
The English Opening: Anglo-Indian Defense, Slav Formation – Playing as Black
You've chosen a solid, flexible system with 1.c4 Nf6 2.Nf3 g6 3.g3 c6 — the English Opening, Anglo-Indian Defense, Slav Formation. You're Black, and your setup aims to build a sturdy pawn chain, develop harmoniously, and keep the game within manageable limits. The engine rates the position at +0.27, a small edge for White, so you're slightly worse out of the opening — but nothing you can't handle with good play. In the drill below, face an adapting engine that will test your understanding of this line. Let's break down what matters most.
Play the English Opening: Anglo-Indian Defense, Slav Formation against the engine
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Create a free account →What This Opening Is Really About
The Slav Formation (the ...c6 pawn) gives Black a compact, difficult-to-break centre. Your knight on f6 and the fianchetto ...g6/...Bg7 mean you're fighting for control of d5 and the long light-square diagonal, while keeping your king safe. Unlike sharper openings, this line rewards patience. White has the slightly more comfortable position, but your structure is almost free of weaknesses — you're inviting White to overreach. If you know how to handle the middlegame, the small engine advantage rarely translates into a real win.
Where the Critical Moment Strikes
White to move, and the engine's top pick is b3, preparing to fianchetto the queen's bishop on b2. After b3 Bg7 Bb2 d6, White has a harmonious English setup — and Black has equalised in space terms. The most popular move by humans, however, is not b3 but Bg2 (played in 2,213 of the 2,658 games). That's fine too. Your response is straightforward: ...Bg7, then ...d6, and you're ready to castle and meet White's centre expansion with ...e5 or ...d5 at the right moment. The engine's preferred continuation shows you that White wants to pressure your queenside — be ready for that.
What the Statistics Reveal
With 2,658 games in the database, the overall results show White winning 50.3%, draws 5.2%, and Black winning 44.5%. Those numbers confirm the position is playable for Black, though White scores slightly better — consistent with the +0.27 evaluation. Look closer at the most-played continuations: when White plays the rare d4 (119 games), Black actually outscores White (White scores only 43.7%). And when White plays the engine's best move b3 (109 games), White's success rate jumps to 64.2% — so statistically, b3 is the variation where Black has to be most careful. On the other hand, d3 (29 games) is a gift: White scores just 34.5% there.
Your Typical Plan – Step by Step
After 1.c4 Nf6 2.Nf3 g6 3.g3 c6, against any sensible White move (Bg2, b3, Nc3, or d4), your plan is: fianchetto your dark-squared bishop to g7, play ...d6 (or occasionally ...d5, depending on the situation), castle kingside, and then decide on central break — ...e5 to challenge White's centre or ...b5 to gain queenside space if White overpresses. Do not rush. Your pawn on c6 protects d5, so you can often meet d4 by White with ...cxd4 or just leave the tension. The key is to not create weaknesses: avoid pushing ...a6 or ...b5 too early, and don't weaken your kingside by advancing ...h5 unless you have a concrete reason.
Results across 2,658 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bg2 | 2,213 | 50.1% |
| Nc3 | 152 | 53.3% |
| d4 | 119 | 43.7% |
| b3 | 109 | 64.2% |
| d3 | 29 | 34.5% |
| b4 | 17 | 52.9% |
Frequently asked questions
Is the Slav Formation a good opening for Black against the English?
Yes — it's a solid, reliable choice. The engine gives White only +0.27, a tiny edge, and Black wins 44.5% of games at this exact position. It's not a line where White can crush you; you get a safe, strategically rich middlegame.
What is White's best move in this position?
According to the engine at depth 16, White's best move is b3, preparing Bb2 and a queenside fianchetto. That said, most players choose Bg2 (2,213 games out of 2,658), which is also perfectly playable and leads to similar structures.
Should I be worried about the +0.27 evaluation as Black?
Not really. +0.27 is a very small advantage — it means White has slightly more space or a marginally better piece placement, but it's nowhere near a forced win. Many club games from this position end in a Black win (44.5%). Focus on your development and structure, and the evaluation won't matter.
What should I do if White plays the rare d4?
Statistically, White scores only 43.7% after d4, so this is actually good for you. Meet d4 with ...Bg7, castle quickly, and prepare to strike back in the centre with ...d5 or ...cxd4. White's premature centre push often gives Black a comfortable game.