Chessy
Petrov's Defense: d4 – Playing Black After 3...Nxe4
After 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4, you have reached a key branch of the Petrov's Defense. The board is already unbalanced — White captured on e5, you captured on e4, and now White has several ways to continue. The engine rates this position at +0.39, a small edge for White, meaning you as Black are slightly worse but absolutely in the fight. The statistics from over 737,000 games confirm Black scores a healthy 45.5% from here — this is a solid, principled choice. Let's look at what the engine considers best, which replies you need to know, and how to punish White's common missteps.
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Create a free account →The Engine's Main Line: Nxe5
Stockfish's top choice for White is 4.Nxe5, and the recommended continuation runs: 4...d5 5.Nd2 Bd6. Already Black has achieved a lot. The pawn on d5 gives you a share of the centre, the bishop on d6 pressures White's knight on e5, and your own knight on e4 is actively posted. White's knight on d2 blocks in the c1-bishop, which can give you time to develop comfortably. This line has been played over 210,000 times in the Lichess database, with White scoring 50.4% — barely above half. That tells you Black is doing fine. Learn this setup well: it's the backbone of your defence.
The Most Common Reply: 4.dxe5
By far the most frequent move at club level is 4.dxe5, appearing in over 311,000 games. White grabs the pawn on e5 and dares you to prove compensation. Here White scores 50.5%, almost identical to the engine line. After 4.dxe5, typical ideas for Black involve ...Qe7 (attacking the e5-pawn and threatening ...Qb4+ or ...Qxe5), followed by developing pieces actively. Your knight on e4 is a strong outpost — don't feel rushed to move it. The position can get sharp, especially if White tries to hold onto the extra pawn. The statistics show no reason to fear this line; it's a balanced fight.
Three White Mistakes You Can Punish
The database reveals three sub-optimal White moves that give you a chance to seize the advantage: 4.Qe2 (an inaccuracy, losing about 0.5 pawns), 4.Bc4 (a outright mistake, losing about 1.8 pawns), and 4.Nc3 (also a mistake, losing about 1.8 pawns). Against 4.Qe2, you can simply develop with ...d5, ...Be7, and ...0-0 — White's queen is exposed to tempo-gaining moves. Against 4.Bc4, you should reply with ...Nxe5 or ...Qe7, threatening the bishop. And against 4.Nc3, the natural ...Nxc3 and ...d5 gives you a comfortable game. Keep an eye out for these — especially 4.Bc4, which appears in over 37,000 games and gives you a real edge if you know the correct response.
Why This Opening Suits You
The Petrov's Defense: d4 line is ideal if you want a reliable, principled answer to 1.e4 that avoids massive theoretical forests. After 3...Nxe4, you are fighting for the centre immediately and the resulting structures are clear. You are slightly worse according to the engine (+0.39), but in practice White only scores 51% — meaning you outscore the engine's expectation by winning 45.5% of games. That gap shows that this position is much easier to play for Black over the board. You have clear plans, few forced lines to memorise, and plenty of opportunities to outplay opponents who don't know the subtleties.
Results across 737,122 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| dxe5 | 311,143 | 50.5% |
| Nxe5 | 210,717 | 50.4% |
| Bd3 | 79,834 | 57.1% |
| Qe2 | 76,611 | 51.0% |
| Bc4 | 37,702 | 49.1% |
| Nc3 | 5,082 | 45.1% |
Frequently asked questions
Is 4.dxe5 or 4.Nxe5 more dangerous for Black?
They are essentially equal in practical strength. White scores 50.5% after 4.dxe5 and 50.4% after 4.Nxe5 — tiny differences. The engine prefers 4.Nxe5, but at club level you are equally likely to succeed against either. Your preparation should focus on both moves.
What is Black's plan after 4.Nxe5 d5 5.Nd2 Bd6?
You have a solid position with control over the centre. Typical plans include castling kingside, developing the c8-bishop (often via f5 or g4 after preparation), and pressuring White's knight on e5. The pawn on d5 gives you a spatial edge in the centre, so look to open the position on your terms.
How should I respond to 4.Bc4 as a mistake?
4.Bc4 is a mistake that loses about 1.8 pawns. The most accurate reply is to capture on f3 with your knight (4...Nxf2? is too greedy — be careful). Instead, simply play 4...Nxe5 5.Bxf7+ Ke7, or the solid 4...Qe7 attacking the bishop and the e5-pawn. Either way you should end up better.
Is the Petrov Defense suitable for beginners?
Absolutely. The 3...Nxe4 line is straightforward: you grab a pawn, White has several tries, and you learn one key setup. There are few long forced lines to memorise, and the typical middlegame plans are easy to grasp. It's an excellent second opening for beginners who want to move beyond just 1...e5.