Chessy
Three Knights Opening: Nf6 – A Balanced Battleground
After 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6, you've reached the Three Knights Opening. It's a cousin of the Four Knights — just without the early Bb4 pin. Here you push 4.d4, the most aggressive way to open the centre. Stockfish evaluates the resulting position at +0.00, which means everything is perfectly balanced: you are neither better nor worse. In practice, White scores a healthy 52.2% across over seven million games (4.7% draws, 43.1% Black wins), and your opponent's most common mistake can hand you a clear advantage. Ready to see where the game really begins?
Play the Three Knights Opening: Nf6 against the engine
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Take on the engine in our interactive drill and practise the Three Knights Opening: Nf6 from White's side. Create a free Chessy account to track your progress.
Create a free account →The Big Decision for Black
When you play 4.d4, Black confronts a fork in the road. Capturing with 4...exd4 is the engine's top choice, and it's also the most popular: it appears in over five million games. That continuation leads to 5.Nxd4 Bb4 6.Nxc6, with a balanced but sharp middlegame ahead. Black can also try to hold the centre with 4...d6 or 4...d5, pin your knight with 4...Bb4, or even trade knights immediately with 4...Nxd4. Each of these sidelines gives White a better statistical score than the main line — some of them by a wide margin. Your job is to know how to handle each reply.
What the Statistics Tell You
The numbers across 7,416,778 games paint a clear story. White's worst result comes against 4...Bb4, where White scores 49.8% — still nearly even, but slightly below the overall average. The most punishing replies for Black are 4...d5 (White scores 59.9%) and 4...Nxd4 (White scores 55.8%). Here's the full picture from best to worst for White: - 4...d5 — White wins 59.9% of games - 4...Nxd4 — White wins 55.8% - 4...d6 — White wins 55.1% - 4...Bd6 — White wins 54.4% - 4...exd4 — White wins 51.3% - 4...Bb4 — White wins 49.8% Notice that every single option still gives White at least a 49.8% score. There is no losing reply for you here.
Three Black Mistakes to Punish
The engine identifies three distinct inaccuracies or mistakes that Black can make on move 4. If your opponent chooses any of them, you'll have a concrete edge to work with: - 4...d6 is an inaccuracy, losing about 0.7 pawns. The correct move was 4...exd4. You gain a small but real advantage. - 4...d5 is also an inaccuracy, costing roughly 0.9 pawns. Again, 4...exd4 was better. This gives you a comfortable plus. - 4...Nxd4 is the worst of the three — a full mistake that loses about 1.1 pawns. Your opponent trades knights prematurely, and you emerge with a clear lead. In each of these cases, your job is straightforward: play simply, develop your pieces, and trust that the engine's evaluation is on your side. The drill below will help you practise the critical 4...exd4 line, where most games are decided.
How to Handle 4...exd4
The main line is 4...exd4 5.Nxd4 Bb4 6.Nxc6. After 6.Nxc6, Black can recapture with either the b-pawn (6...bxc6) or the d-pawn (6...dxc6). Both are playable and lead to different pawn structures. With ...bxc6, Black gets a semi-open b-file and a queen-side majority. With ...dxc6, the centre is symmetrical but Black's dark-squared bishop is active on b4. Stockfish keeps the evaluation near +0.00 through all these variations, so you are playing for a win in a balanced position. Focus on quick development: castle early, connect your rooks, and aim for a slight space advantage. The engine line is a reliable guide, and the drill will let you test your understanding against it.
Results across 7,416,778 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| exd4 | 5,330,703 | 51.3% |
| d6 | 723,447 | 55.1% |
| Bb4 | 677,856 | 49.8% |
| d5 | 226,397 | 59.9% |
| Nxd4 | 153,987 | 55.8% |
| Bd6 | 145,704 | 54.4% |
Frequently asked questions
Is the Three Knights Opening a good choice for beginners?
Yes. The Three Knights Opening (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6) follows basic opening principles: develop knights, control the centre, and prepare to castle. The position after 4.d4 is dead level (+0.00), so you won't be worse out of the opening, and you get plenty of natural attacking chances.
What is the most common reply Black plays against 4.d4?
The most common reply is 4...exd4, played in over 5.3 million games. The engine also prefers this move. After 5.Nxd4 Bb4 6.Nxc6, Black can recapture with either pawn. White scores 51.3% in this line, making it a balanced but fighting position.
Which Black move should I hope to face as White?
Statistically, your best results come against 4...d5 (White scores 59.9%) and 4...Nxd4 (White scores 55.8%). Both are inaccuracies or mistakes according to the engine. The 4...d5 line loses about 0.9 pawns, while 4...Nxd4 loses about 1.1 pawns. If your opponent plays either of these, you have a clear edge.
What happens if Black plays 4...Bb4?
4...Bb4 pins your knight on c3 and is the only move that drops White's winning percentage below 50% — you score 49.8% in this line. However, that is still nearly even. The position remains playable, and the engine still evaluates it near equality. Just develop naturally and don't overreact to the pin.
How many games feature the Three Knights Opening: Nf6?
Over 7 million Lichess games have reached the Three Knights Opening: Nf6 position. White wins 52.2%, Black wins 43.1%, with 4.7% draws — based on real rated games.