Chessy
The Nimzowitsch Defense: Neo-Mongoloid Defense — Playing Black
You've stepped into one of the sharpest sidelines of the Nimzowitsch Defense. After 1.e4 Nc6 2.d4 f6, you've weakened your king's safety from the opening moves, and the engine already sees things going badly for you. Stockfish rates this +1.57, a near-winning edge for White. That means you are already facing a very tough battle from here. But don't close the tab yet — this page shows you what to expect, which replies punish you hardest, and where opponents most often let you back into the game. Jump into the interactive drill below to feel the position for yourself.
Play the Nimzowitsch Defense: Neo-Mongoloid Defense against the engine
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Jump into the interactive drill below and practice defending this tricky position as Black. Creating a free account lets you track your progress and replay the
Create a free account →The Big Problem with 2...f6
The move 2...f6 aims to challenge White's centre right away, but it comes at a serious cost. You've weakened the e6 square and the diagonal leading to your king, and you've taken away the best square for your g8-knight. White now has a comfortable lead in development and several strong ways to press the advantage. Across 45,236 games from this exact position, White wins 63.5% of the time, while Black wins only 33.1% (with just 3.3% draws). Those numbers tell a clear story: the Neo-Mongoloid Defense is a big ask for Black. Your goal is to survive the opening and hope White misplays the attacking chances.
White's Best Reply: Nf3
The engine's top choice is 3.Nf3, aiming for quick development and central control. The best continuation runs 3.Nf3 e5 4.Bc4 exd4 — White develops with tempo while you're still trying to untangle. From that point Black's position remains cramped and awkward. The statistics on Nf3 are brutal: White scores 64.0% across 12,983 games. If your opponent knows this line, you'll need to defend accurately and look for counter-chances later in the middlegame. The good news? Most club players don't find the most punishing plans, so stay alert for inaccuracies.
Which Replies Are Mistakes for White?
Not every White player will find 3.Nf3. Two common alternatives are actually mistakes, and you should be ready to pounce. 3.c4 is an inaccuracy that loses about 0.8 pawns of advantage — White should have played Nf3 instead. Over 2,078 games, White still scores 63.5% with c4, so you're not out of the woods, but your chances improve. 3.f4 is another inaccuracy, losing around 0.7 pawns compared to Nf3. Across 1,456 games White scores 62.6% — still dangerous, but another opportunity. The most popular move overall is 3.d5 (18,143 games, White scores 63.8%), which pushes your knight back to b8 or over to e5. That's not a mistake per se, but it gives you a clear target: the d5 pawn can become weak later.
Your Survival Plan
With Black, your main priorities are simple but tough to execute. First, get your king to safety — castling is urgent, but be aware that your f6 pawn blocks a traditional kingside castle. You may need to go queenside or, in some lines, keep your king in the centre carefully. Second, develop your pieces without creating new weaknesses. Your light-squared bishop on c8 is your problem child — it often sits passive for a long time. Third, look for a pawn break to challenge White's centre. If White plays d5 early, consider ...e5 to open lines. If White develops calmly, ...d6 followed by ...e5 can free your position. The engine evaluation of +1.47 (the evaluation of the position, White favour) means you're close to losing, but in practical play, many White players fail to convert this advantage. Stay tough.
Results across 45,236 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| d5 | 18,143 | 63.8% |
| Nf3 | 12,983 | 64.0% |
| Nc3 | 2,789 | 64.5% |
| c4 | 2,078 | 63.5% |
| Bc4 | 1,775 | 66.1% |
| f4 | 1,456 | 62.6% |
Frequently asked questions
Is the Neo-Mongoloid Defense a good opening for beginners?
Not really. Stockfish gives White a near-winning +1.57 advantage right after 2...f6, and White wins 63.5% of games from this position. Beginners already face enough challenges without starting the game in a critical situation. You're better off learning sounder lines of the Nimzowitsch Defense, like 2...e5 or 2...d5.
What should Black do after White plays 3.d5?
3.d5 is the most common reply (18,143 games). Your knight on c6 must move — retreat to b8 or go to e5. Kxe7 is illegal — more practically, 3...Ne5 is fine, but expect White to chase it with 4.f4 or 4.Bf4. The d5 pawn can later become a target if you can organise ...c6 or ...e6 breaks.
Why is 2...f6 considered bad?
The move weakens your kingside, takes the best square from your g8-knight, and does nothing to help development. It challenges the d4 pawn but at a high cost. The engine evaluation (+1.57) and Black's poor 33.1% win rate show just how risky it is compared to more solid options.
Can Black still win after 2...f6?
Yes, Black wins 33.1% of games at this position — that's one in three. Many opponents don't know the best plans and will make inaccuracies like 3.c4 or 3.f4. If you defend accurately and wait for your opponent's mistakes, you can absolutely turn the game around. It's just an uphill climb from the start.
How many games feature the Nimzowitsch Defense: Neo-Mongoloid Defense?
Over 45K Lichess games have reached the Nimzowitsch Defense: Neo-Mongoloid Defense position. White wins 63.5%, Black wins 33.1%, with 3.3% draws — based on real rated games.