Chessy
Ruy Lopez: Nf6 — How to Turn a Small Edge into a Full Point
After 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O, you've reached one of the most popular positions in all of chess. Black has a choice to make, and the stats are clear: out of over four million games from this point, White scores 56.4% wins — a huge tally for a sound opening. The engine gives +0.34, confirming you have a small but real edge from move one. The drill below puts you in White's shoes against an adapting engine, so you can learn to meet Black's every answer with confidence. Let's walk through what matters most.
Play the Ruy Lopez: Nf6 against the engine
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Ready to put these ideas into practice? The drill below lets you play the position after 4.O-O against an engine that adapts to your level. Start the exercise —
Create a free account →The Critical Moment: Black's Decision on Move 4
Black to move, and the statistics reveal a clear hierarchy of replies. The most popular choice is Bc5 (1,155,200 games), followed by the principled central capture Nxe4 (916,877 games), then the solid d6 (848,562 games), and finally the committal a6 (572,937 games). Each continuation presents a different challenge — but the engine identifies Black's best as Nxe4. That is the line you need to understand first, because it's the most testing. From there, play continues 5.Nxe4 Re1 6.Nd6 Nxe5, reaching a position where White's lead in development and pressure on e5 compensate for the pawn.
The Engine's Answer: Why Nxe4 Is Best for Black
Stockfish rates Nxe4 as the only move that keeps Black close to equality. After 4...Nxe4 5.Re1 (the automatic reply — you attack the knight and threaten to win it back immediately), Black typically plays 5...Nd6, retreating the knight to a safe square. Then 6.Nxe5 puts the pawn back on the board and leaves Black's knight on d6 slightly misplaced. This line scores 57.8% for White across nearly a million games. The key idea: you don't rush to recover the pawn with 5.d3? (that allows 5...exd4 with advantage to Black). Instead, 5.Re1 exploits the pin on the e-file and forces Black to waste time retreating.
Punishing Black's Mistakes: Bc5, a6, and Bd6
The engine flags three common replies as suboptimal. Bc5 (the most-played move) is actually an inaccuracy losing about 0.8 pawns. White can gain time by attacking the bishop with c3 and d4, building a strong centre. a6 is a full mistake (losing ~1.3 pawns) — an impatient move that weakens the queenside and lets White keep the bishop with Bc4 or Ba4, maintaining pressure. Bd6 is also a mistake (~1.3 pawns), blocking Black's own d-pawn and making d5 harder to achieve. The best advice: against these four-million-game-tested mistakes, simply develop naturally and trust the engine's verdict that you are better.
What the Win Rates Tell You
At 56.4% White wins (with only 3.6% draws), this is a high-scoring opening for the first player. Compare that to Black's 39.9% — White's advantage is very real at the club level. Even against the most popular reply, Bc5, White scores 55.6%. Against the critical Nxe4, White still scores 57.8%. The best news? Black's worst-scoring major reply is a6 at 59.3% for White — meaning the more Black tries to force the issue early, the more they tend to lose. Your job is simple: stay principled, maintain the pressure, and let the statistics do the rest.
Results across 4,162,953 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bc5 | 1,155,200 | 55.6% |
| Nxe4 | 916,877 | 57.8% |
| d6 | 848,562 | 53.7% |
| a6 | 572,937 | 59.3% |
| Be7 | 152,811 | 54.3% |
| Bd6 | 144,482 | 60.1% |
Frequently asked questions
Is 4...Nxe4 a refutation of the Ruy Lopez?
No. In fact, 4...Nxe4 is Black's best try, but White still scores 57.8% after it. The line 4...Nxe4 5.Re1 Nd6 6.Nxe5 is well known and leaves White with active pieces and a central pawn majority. Black is not threatening to seize the advantage — they are just fighting for equality.
Should I play d3 or Re1 after 4...Nxe4?
Play 5.Re1, not 5.d3. The move 5.Re1 puts immediate pressure on Black's knight on e4 while it is pinned to the king along the e-file. If you play d3 instead, Black can take on d4 and complicate matters. The engine's recommendation is clear: 5.Re1.
What is the best way to meet 4...Bc5 as White?
Since Bc5 is an inaccuracy (~0.8 pawns worse than Nxe4), you can handle it with simple development. The typical idea is c3 followed by d4, challenging Black's centre and bishop. White scores 55.6% in this line, so you are doing well without needing any tricky preparation.
Why is 4...a6 considered a mistake?
Black plays a6 to ask what your bishop will do, but at this stage it is premature. The engine says a6 loses about 1.3 pawns compared to the best move Nxe4. White can calmly retreat the bishop to a4 or c4 and continue developing, while Black has wasted a tempo. White's win rate jumps to 59.3% against this move.
How many games feature the Ruy Lopez: Nf6?
Over 4 million Lichess games have reached the Ruy Lopez: Nf6 position. White wins 56.4%, Black wins 39.9%, with 3.6% draws — based on real rated games.