Chessy
The Blackburne-Kostić Gambit: White Castles Early and You Strike Back
At first glance the Blackburne-Kostić Gambit looks like reckless aggression: after the standard Italian moves 1.e4 e5 2.Nf3 Nc6 3.Bc4, Black immediately lunges with 3…Nd4, ignoring the threat to the pawn on e5. When White castles (4.O-O) instead of taking the knight, you lunge again with 4…b5 — offering a pawn to disrupt the bishop and keep your knight on d4. This is a sharp, high-risk gambit where one precise move from White can leave you in serious trouble. The drill below puts you on the Black side of this wild position. Play it and see if you can handle what comes next — because the statistics and the engine agree: this is a dangerous moment for you.
Play the Italian Game: Blackburne-Kostić Gambit: O-O against the engine
Free, no signup — you play black, the engine adapts to your level.
Ready to turn the tables when White misplays? Jump into the interactive drill below — practise handling Bxf7+, spotting White's mistakes, and fighting back from
Create a free account →Why This Position Favours White — and How Much
The engine rates this position at +2.15, a clear edge for White. That means you are significantly worse here — the position is close to decided in your opponent's favour. The database from 8,891 games paints a similar picture: White wins 57.9% of the time, while Black wins only 39.2%, with just 2.8% draws. These numbers are a reality check: the Blackburne-Kostić Gambit is not a sound equaliser. You are playing for complications and hoping your opponent doesn't find the strongest replies. If they do, you will have to defend accurately just to stay in the game.
The Engine's Top Choice: Bxf7+
White's strongest move here is Bxf7+, a bishop sacrifice that rips open your kingside. After Bxf7+ Kxf7 Nxd4, White regains the knight and leaves you with a wrecked pawn structure and a vulnerable king. The engine's continuation runs Bxf7+ Kxf7 Nxd4 Nf6 — notice Black tries to develop and fight back, but the damage is done. White scores a crushing 63.8% in the 1,738 games where this sacrifice was played. If your opponent finds this move, you are in a tough spot. Your task is to minimise the damage and keep playing actively, because passive defence will just let White's attack roll over you.
The Mistakes White Often Makes
Here is the good news: most White players do not find the best move. The database shows several far more common replies — and the engine labels them as clear errors. Here are the top three: - Bb3 (2,260 games, the most popular move) is an inaccuracy that loses roughly 0.8 pawns of advantage. It sidesteps the attack on the knight but gives you time to consolidate. - Bd5 (1,625 games) is also an inaccuracy, losing about 0.9 pawns. It attacks the knight on d4 but lets you trade or retreat without the brutal sacrifice. - Nxd4 (1,547 games) is a full mistake, losing about 1.3 pawns. Taking the knight on d4 with the knight lets you recapture with …exd4, opening lines and freeing your game. If White plays any of these, your gambit has paid off — you are no longer worse, and you can start playing for a win.
What to Do Against the Most Popular Replies
When White plays Bb3 (the most common response), your bishop on c4 is chased but not captured. You can consider …Bb7 or …d6 to develop, keeping the knight on d4 as a thorn in White's side. After Bd5, you have options: you might trade on d5 with …Nxd5 or support the knight with …c6. The key is not to panic — White has let the initiative slip. Against Nxd4, simply recapture …exd4 and enjoy the central space and open lines. In all these cases, the engine says you are now equal or better. Your job in the drill is to spot these chances and punish White's inaccurate play.
Results across 8,891 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bb3 | 2,260 | 58.7% |
| Bxf7+ | 1,738 | 63.8% |
| Bd5 | 1,625 | 57.2% |
| Nxd4 | 1,547 | 55.7% |
| Bd3 | 1,050 | 59.2% |
| Be2 | 260 | 56.2% |
Frequently asked questions
Is the Blackburne-Kostić Gambit a good opening for Black?
Objectively, no — the engine gives White +2.15, a near-winning advantage, if White plays the best reply Bxf7+. However, in practice White often does not find that move (Bb3, Bd5, and Nxd4 are all common and inferior), and Black scores 39.2% in real games. It is a risky choice suited to players who want unbalanced positions and are happy to rely on opponent mistakes.
What is the point of 3…Nd4 in the Italian Game?
Black attacks the bishop on c4 and the pawn on e5 simultaneously, forcing White to react. If White takes the knight (Nxd4), Black recaptures …exd4 and gets a strong centre and open lines. If White ignores it and castles (as in 4.O-O), Black follows up with …b5, kicking the bishop and keeping the knight centralised. It is a tricky, aggressive idea that can catch unprepared opponents.
How should White respond to the Blackburne-Kostić Gambit?
The engine's best move is Bxf7+, sacrificing the bishop for a pawn and exposing Black's king. After Bxf7+ Kxf7 Nxd4 Nf6, White has a clear advantage (+2.15). Most popular moves like Bb3, Bd5, or Nxd4 are all inaccuracies or mistakes — so the gambit works best when White does not know the refutation.
What happens if White plays Nxd4 in this position?
That is a mistake (losing about 1.3 pawns). You recapture with …exd4, gaining central space and opening the e-file for your rook. Your bishop on b7 or the knight on f6 can develop naturally, and White no longer has the dangerous Bxf7+ sacrifice available. You should be at least equal after this.