Crushing the Nimzowitsch Defense: Declined Variation e6

The position after 1.e4 Nc6 2.Nf3 e6 3.d4 is about space and development. You've already claimed the centre with two pawns — e4 and d4 — while Black's e6 pawn blocks their light-squared bishop. Your knight on f3 eyes the centre and supports the d4 advance. The engine's evaluation of +0.90 tells you that you are clearly better here. Your plan is simple: build on that space advantage, keep developing, and keep Black cramped. Notice that Black's most popular move from here is 3...d5 (occurring in over 736,000 games), which directly challenges your centre — that's the kind of honest reply you should welcome, because it leads to open play where your development lead can shine.

When Black plays the most popular continuation, 3...d5, the engine's best response is to keep building: after 4.e5 (pushing the pawn past the knight on c6) followed by 5.f6 — wait, let's be precise. The engine's best continuation from this position is actually d5 (meaning Black's move), and then you continue with e5, then f6, then Bd3. This line locks in the central space advantage: your pawn on e5 restricts Black's knight on c6 and your d4-pawn controls c5. The Bd3 development prepares kingside castling and eyes the h7 square. Across 736,816 games where Black played 3...d5, White still scores a healthy 52.9% — slightly below the overall average, which tells you this is Black's most challenging try, but you remain in strong shape.

Let's look at what Black actually plays in practice and how you fare against each reply. The numbers come from over two million Lichess games at this exact position (3.d4, Black to move):- 3...d5 — White scores 52.9% (736,816 games). Solid, but Black's best try.- 3...Nf6 — White scores 54.8% (396,554 games). A natural developing move, yet you do even better.- 3...Bb4+ — White scores 55.9% (188,416 games). Those check-everything moves often waste tempo; you're winning here more often than average.- 3...d6 — White scores 54.3% (148,709 games). Another solid but passive reply.- 3...b6 — White scores 54.7% (118,954 games). Black fianchettoes but falls further behind in space.- 3...g6 — White scores 54.2% (69,763 games). Interestingly, this is flagged as a known mistake.

If your opponent plays 3...g6, you've caught them in an inaccuracy. Stockfish says this move loses roughly 0.8 pawns compared to the best move (which is 3...d5). The problem is clear: Black's knight on c6 still blocks the c-pawn, and now the dark-squared bishop goes to g7 — a fine square in many openings, but here Black hasn't solved their central problems. Your centre is still intact, your knight is developed, and Black has done nothing to challenge d4 or e4. The engine's best reply against 3...g6 is the same idea: play d5 yourself (yes, Black's best move is d5 — when they don't play it, you effectively gain a free tempo). In the drill below, keep this in mind: if Black wastes time with a flank fianchetto, tighten your grip on the centre and punish them.