Chessy
The Bishop's Opening: Berlin Defense — Why 3.Bxf7+? Is a Blunder for White
You've played 1.e4 e5 as Black, and your opponent develops the bishop to c4. You answer with the aggressive 2...Nf6, and now White falls for the trap: 3.Bxf7+? You take with 3...Kxf7. You've given up castling rights, but what did White gain? Almost nothing. The engine evaluates this position at -2.94, a huge advantage for Black — meaning you are already close to winning. White has traded a bishop for a pawn and lost a tempo. Your king is safe enough in the centre, your dark-squared bishop is unimpeded, and it is White who must prove they have any compensation. Below the drill, you will face White's most common replies and learn how to punish each one.
Play the Bishop's Opening: Berlin Defense: Bxf7+ against the engine
Free, no signup — you play black, the engine adapts to your level.
Test your skills in the interactive drill below — face White's most common moves and learn to punish the Bxf7+ blunder. Create a free account to track your win
Create a free account →What You're Fighting For: Lead in Development and the Two Bishops
After 3.Bxf7+ Kxf7, White has spent three moves to win one pawn and trade off their light-squared bishop. You have your king on f7 — slightly exposed, but perfectly safe for now because White has almost nothing to attack it with. Crucially, you still have both of your bishops, while White has only one. Your king's rook is already a move away from the semi-open f-file, which can become useful if White ever advances f4. Your immediate goals are simple: develop your pieces, control the centre with ...d5 or ...d6, and laugh at White's lack of a plan. Black's extra development and the bishop pair give you everything you need to convert this into a full point.
The Engine's Answer: White's Best Try Is f4
Stockfish's first recommendation for White is f4, which makes sense — White wants to open lines and create counterplay before you consolidate. The engine continues with f4 d6 d4 exd4, and even in this 'best' line Black is completely fine. The statistics bear this out: across 35,984 games where White played f4, White still only scored 54.2%. That is the highest White score of any continuation, yet it is still far from a winning edge. From your perspective as Black, simply playing d6 (or the even more active d5) gives you a comfortable game. White's f4 is an admission that the Bxf7+ 'sacrifice' has failed.
Most-Played Replies and What to Do Against Each
Here are the most common moves White tries and how you should handle them as Black. The numbers come from over half a million games at this exact position. Nf3 (229,570 games, White scores 51.5%): the most popular. Develop naturally with ...d6 or ...d5 and finish development. White's score here is inflated by weaker Black play — stay solid. d3 (96,342 games, White scores 48.6%): a passive move. You can play ...d5, gaining a big centre. c3 (44,650 games, White scores 51.8%): actually an inaccuracy that loses about 0.8 pawns compared to f4. Answer with ...d5, contesting the centre. Qf3 (28,617 games, White scores 41.6%): this is a clear mistake (loses ~1.7 pawns). Your queen on e7 or your bishop on e6 can block the check, and your king is perfectly safe. d4 (30,693 games, White scores 53.4%): immediately open the centre. You can capture with ...exd4 and follow up with ...d5 to dominate.
The Worst Offender: Why Qf3 and c3 Help You Most
Two moves stand out as especially bad for White, and you should know them so you can punish them confidently. Qf3 is a mistake that loses roughly 1.7 pawns of advantage. After Qf3, Black can simply play ...Ke8, ...Qe7, or ...Be6, blocking the check and forcing White's queen to awkwardly retreat. White's score drops to just 41.6% here — a terrible outcome. c3 is classified as an inaccuracy, losing about 0.8 pawns. White intends d4, but you can immediately play ...d5, seize the centre, and laugh at the misplaced bishop's absence. Against either move, simple development and central control will leave White regretting that early bishop sacrifice.
Results across 508,599 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nf3 | 229,570 | 51.5% |
| d3 | 96,342 | 48.6% |
| c3 | 44,650 | 51.8% |
| f4 | 35,984 | 54.2% |
| d4 | 30,693 | 53.4% |
| Qf3 | 28,617 | 41.6% |
Frequently asked questions
Is 3.Bxf7+ a real opening or just a beginner's trap?
It is a genuine but unsound line in the Bishop's Opening Berlin Defense. Stockfish evaluates the resulting position at -2.94, a near-winning advantage for Black. While it appears in over 500,000 games on Lichess, White scores only 49.9% — meaning Black actually wins almost as often as White does, despite playing without castling rights.
How should Black respond to the most common move Nf3?
After 1.e4 e5 2.Bc4 Nf6 3.Bxf7+ Kxf7, White plays Nf3 in about 229,000 games. Your best plan is to play ...d6 or ...d5, followed by ...Be6 or ...Bg4, and ...Nc6. Develop naturally, keep your king safe, and enjoy your extra piece for a pawn's worth of compensation.
What is the biggest mistake White can make after 3...Kxf7?
Playing Qf3 is the worst move — it is classified as a mistake that loses about 1.7 pawns compared to the engine's best move f4. White scores only 41.6% after Qf3. You can simply play ...Ke8 or ...Qe7 to block the queen's threat, then continue developing.
Should Black try to keep the king on f7 or move it back?
There is no rush — your king on f7 is safe for several moves because White has no major pieces developed and only a few pawns and knights in the vicinity. If you feel unsafe, ...Ke8 is a calm option. Many strong Black players leave the king on f7 for a few moves while they develop, then decide later.