You've entered one of the most respected lines in the Ruy Lopez: the Berlin Defense, and White has answered with 4.Nc3 instead of the more famous 4.O-O. The result is a tense, symmetrical-looking struggle where both sides have already committed their kingside knights and bishops. The engine calls this dead level — a small +0.24 edge for White, but in practical play the statistics are razor-thin, with White winning 49.8%, draws 5.3%, and Black winning 44.8% across over 1.5 million games. Your task as Black is to handle the critical early moments and steer toward a middlegame you know better than your opponent. The interactive drill below will sharpen that skill.
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Play the Ruy Lopez: Berlin Defense: Nc3 against the engine
Free, no signup — you play black, the engine adapts to your level.
Fire up the interactive drill below and practise the Berlin Defense with Nc3 from Black's side. The adapting engine will challenge you against every common move
Find your own #1 mistake — free →The Main Idea: Fight for the Centre and Keep the Tension
After 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.Nc3 Bb4, the position resembles a Four Knights Game crossed with a Ruy Lopez. Black has developed both knights, pinned White's c3-knight, and is ready to castle. The engine's best continuation is 5.O-O O-O 6.d3 Bxc3 7.bxc3, trading off the dark-squared bishops and giving Black a solid if slightly passive structure. Your core idea here is simple: don't rush. Castling early (as both sides do in the engine line) keeps the king safe and lets you wait for White to show their plan. The symmetry is deceptive — Black has plenty of counterplay, especially if White overreaches with an early pawn advance in the centre.
What Happens After White's Most Popular Moves?
The database shows six main replies for White, each demanding a different response from you as Black. Let's walk through them quickly: - 5.Bxc6 (539,516 games, White scores just 49.2%). White takes on c6 immediately, doubling your b-pawn. This releases the tension early; you recapture with the d-pawn (dxc6) and get a solid if slightly immobile centre. Black scores well here. - 5.d3 (370,702 games, White scores 51.4%). A quiet, classical move. You can simply castle (5...O-O) and the game often transposes to the engine line. - 5.O-O (304,161 games, White scores 51.5%). The engine's best. You answer 5...O-O and after 6.d3 Bxc3 7.bxc3 you're in the main line — watch White's bishop pair but enjoy your freer piece play. - 5.a3 (206,314 games, White scores only 47.2%!). This is actually a Black-friendly move. After 5...Ba5 (or Bxc3) you get an annoying pin or a trade on c3, and the statistics show Black does well. - 5.Nd5 (50,289 games, White scores 50.4%). An aggressive jump. You should kick it with 5...Nxd5 6.exd5 Ne7 or simply Bc5 — your pawn structure stays sound. - 5.d4 (25,819 games, White scores just 46.3%). The known mistake. White pushes too soon, losing about one pawn in evaluation. More on that below.
Punish White's Mistake: `5.d4`
The engine identifies 5.d4 as a concrete mistake in this position, costing White roughly one pawn in value compared to the best move (5.O-O). Why is it so bad? After 5.d4 exd4 6.Nxd4, Black can play 6...Nxd4 7.Qxd4 (or 7.Bxd7+) and then ...c6 or simply castle, leaving White's d4-square vulnerable and Black's pieces actively placed. The statistics confirm this: White wins only 46.3% from 5.d4, their lowest winning percentage of any common move in this position. As Black, if you see 5.d4 on the board, you should feel confident — the opening has already gone your way. Capture on d4 and aim for a quick ...d5 break to seize the centre.
A Middlegame to Look Forward To
When White plays the best move 5.O-O and the game follows 5...O-O 6.d3 Bxc3 7.bxc3, you reach a typical Berlin-with-Nc3 middlegame. White has the bishop pair and a slightly better pawn structure, but you have active pieces, no weaknesses, and the c6-knight is eyeing the d4-square. Your typical plan: finish development with ...b6 and ...Bb7, or ...d6 and ...Re8, then decide whether to strike in the centre with ...d5. The engine evaluation (+0.24) is negligible — this is a fighting game where understanding the structures matters far more than memorising variations. The drill below will let you practise the first ten to fifteen moves against a live engine, so you can feel the flow for yourself.
Results across 1,532,544 Lichess games
| Most-played continuation | Games | White wins | |
|---|---|---|---|
| 1 | Bxc6Main line | 539,516 | 49.2% |
| 2 | d3 | 370,702 | 51.4% |
| 3 | O-O | 304,161 | 51.5% |
| 4 | a3 | 206,314 | 47.2% |
| 5 | Nd5 | 50,289 | 50.4% |
| 6 | d4 | 25,819 | 46.3% |
Frequently asked questions
Is the Berlin Defense with Nc3 good for Black?
Yes, it is perfectly sound. The engine gives +0.24, which is a tiny edge for White — essentially dead level at human level. In practice, Black scores 44.8% wins versus 49.8% for White across 1.5 million games, so you have excellent chances as Black.
What is the best move for White after 4.Nc3 Bb4?
The engine's top choice is 5.O-O, leading to 5...O-O 6.d3 Bxc3 7.bxc3. This is the most principled continuation. The most-played move overall is 5.Bxc6, but Black scores just as well against it.
What should Black do if White plays 5.a3?
You have two good options: retreat the bishop to a5 or take on c3. The statistics show White scores only 47.2% after 5.a3, which is Black's best score against any of White's common moves. Keep the pressure and don't rush.
Why is 5.d4 a mistake in this position?
5.d4 costs White roughly 1.04 pawns in engine evaluation compared to the best move 5.O-O. White's premature central push opens lines before their king is castled, and Black can profit by capturing on d4 and following up with quick development. White's win rate drops to just 46.3% after this move.
How many games feature the Ruy Lopez: Berlin Defense: Nc3?
Over 2 million Lichess games have reached the Ruy Lopez: Berlin Defense: Nc3 position. White wins 49.8%, Black wins 44.8%, with 5.3% draws — based on real rated games.