Chessy
Petrov's Defense: Three Knights Game with Bc5 – Playing White
The Petrov's Defense is famous for being solid and symmetrical — but when Black plays 3...Bc5 instead of the standard knight recapture, they're already stepping onto tricky ground. After 1.e4 e5 2.Nf3 Nf6 3.Nc3 Bc5, you can strike immediately with 4.Nxe5, grabbing a pawn and forcing Black to prove they have compensation. In the drill below, you'll face the resulting position and learn how to keep the pressure on. Stockfish rates the position +1.09, a clear and lasting edge for White — meaning you are clearly better here. Let's see how to make it count.
Play the Petrov's Defense: Three Knights Game: Bc5 against the engine
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Ready to try it? You're White in the Petrov's Defense: Three Knights Game. After 1.e4 e5 2.Nf3 Nf6 3.Nc3 Bc5, play 4.Nxe5 and face Black's reply. You have a +1.
Create a free account →What You're Fighting For
After 4.Nxe5, Black has to show something for the pawn, and the engine makes it clear: the advantage is yours to hold. The key is that Black's light-squared bishop on c5 is active but can become a target, and Black's knight on f6 lacks immediate threats because the e5-pawn is gone. You're not just up a pawn — you have the safer king and easier development. Black will often try to create chaos with checks or quick piece play, but if you stay calm and develop, the extra material should tell. The engine's best continuation is Bd4, which kicks your knight on e5 and forces Black to commit. Your job is to handle that disruption and come out with your advantage intact.
The Engine's Best Move: Bd4
The most accurate reply for Black is 4...Bd4, which attacks the knight on e5 and threatens a discovered check. The engine gives the straightforward reply Bd4 Ng4 Nxg4 Qxg4, which wins the knight but leaves you with a pawn and Black's queen misplaced. After that sequence, you're still up a pawn, Black's queen is exposed, and you can chase it with tempo while completing development. This line is rare at lower levels — most Black players avoid it because exchanging their knight for yours leaves them with little activity. But if they do find it, you just have to stay calm, eat the trade, and enjoy your endgame edge.
Most Common Continuations and How They Score
Over 1,255,802 games have reached this position in the Lichess database. Here's how White scores against the most popular Black moves: Nc6 (528,318 games — White wins 41.6% — this is Black's most common move but White's worst score; be careful, Black has good counterplay), d6 (285,949 games — White wins 54.7% — solid, just retreat the knight and keep the pawn), O-O (158,467 games — White wins 53.3%), Qe7 (128,498 games — White wins 51.0%), and then the two tactical tries: Bxf2+ and d5. The numbers are clear: Black's most popular move (Nc6) is actually your hardest test, while the quieter moves like d6 let you consolidate. The tactical tries score even worse for Black — if you know how to answer them.
Punishing Black's Mistakes: Bxf2+ and d5
Two moves in this position are classified as errors. 4...Bxf2+ is a full mistake worth about 2.49 pawns — Black sacrifices a bishop for two checks and a pawn, but you accept the sacrifice, emerge with a piece ahead, and the king is safe. Black hoped for tactical tricks but you're winning easily if you keep your head. 4...d5 is an inaccuracy costing about 0.59 pawns. Black attacks your knight and central pawn, but the best reply keeps the extra material and a great position. The engine says both of these were worse than the correct Bd4, so if your opponent grabs either one, you can confidently say the advantage has grown. Watch for Bxf2+ in blitz especially — be ready to accept the sacrifice.
Results across 1,255,802 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nc6 | 528,318 | 41.6% |
| d6 | 285,949 | 54.7% |
| O-O | 158,467 | 53.3% |
| Qe7 | 128,498 | 51.0% |
| Bxf2+ | 41,347 | 56.2% |
| d5 | 35,651 | 53.3% |
Frequently asked questions
Is 4.Nxe5 actually safe for White?
Yes — Stockfish evaluates the position at +1.09, which is a clear advantage for White. Black has to prove compensation for the pawn, and the engine's best line (Bd4 Ng4 Nxg4 Qxg4) leaves White up a pawn with a safer position. The score from 1,255,802 Lichess games (49.2% White wins, 47.7% Black wins) is closer than the engine suggests because the position is tactical, but strong White players score well above 49%.
What should I do against 4...Nc6?
4...Nc6 is Black's most common move (528,318 games) but also their best practical try — White only scores 41.6% in the database. The natural idea is to retreat the knight to a safe square and keep the extra pawn while developing. Don't try to hold e5 with d4 immediately — Nxe5 leaves you under attack. Play calmly and Black's compensation dries up.
How do I punish 4...Bxf2+?
Accept the sacrifice — take the bishop and you're up a clean piece. Black hopes for tactical tricks with the knight, but you move the king to safety and you have a piece for nothing. The engine says this loses Black about 2.49 pawns of advantage — it's a terrible trade for them. Just don't panic and you'll win easily.