Chessy
Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+)
One of the most infamous unsound gambits in chess history — White tosses a bishop into f7 after just four moves, betting entirely on shock value. Stockfish condemns it at −2.36 (Black's favour), and across 483,060 Lichess games White scores only 45.9%. Play it on Chessy and see how far chaos takes you.
Play the Jerome Gambit against the engine
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Create a free account →The engine verdict: objectively losing for White
After 4.Bxf7+ Stockfish evaluates the position at −2.36 — over two pawns in Black's favour at depth 16. White has sacrificed a bishop for a single pawn and has no real compensation: no open file, no lasting initiative, no structural benefit. The principal variation runs 4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+, where White picks up a knight but remains down a piece. This is not a temporary imbalance — White is simply worse, and the engine knows it.
Why it's a trap weapon, not a practical edge
The Jerome is a pure shock weapon, and the numbers show it. Overall, White scores 45.9% across 483,060 games — Black outscores White. The gambit only "works" when Black panics: Kf8 (14,375 games) hands White a 57.0% score, and Ke7 (1,511 games) rockets to 65.1% — both are blunders worth 400+ centipawns. The moment Black finds the correct Kxf7, White is in a losing structure. It's a memory test disguised as an opening.
How to defuse it: take on f7 and develop
The refutation is the natural capture: 4...Kxf7 (played in 467,174 games). After 5.Nxe5+ accept the knight trade with 5...Nxe5, return material as needed, and focus on development and king safety. Avoid Kf8 or Ke7 — both surrender a massive practical advantage to a gambit the engine already condemns. Once material is equalised, Black's extra piece wins the endgame without drama.
If you play it as White on Chessy
Go in knowing you need your opponent to blunder. The position after Kxf7 is objectively lost for White — no engine line recovers it. The fun (and the training value) is learning to squeeze practical chances from a worse position, build attacking patterns rapidly, and understand why piece sacrifices that open the king aren't always enough. Just don't mistake table-flip chess for sound theory.
Results across 483,060 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Kxf7 | 467,174 | 45.5% |
| Kf8 | 14,375 | 57.0% |
| Ke7 | 1,511 | 65.1% |
Frequently asked questions
Is the Jerome Gambit sound?
No. Stockfish evaluates 4.Bxf7+ at −2.36 — more than two pawns in Black's favour — and White scores only 45.9% across 483,060 Lichess games. It is one of the most objectively unsound gambits in mainstream chess.
What is the best reply to the Jerome Gambit?
Accept the bishop: 4...Kxf7. After 5.Nxe5+ Nxe5 6.Qh5+ neutralise calmly and develop. Kf8 and Ke7 both blunder 400+ centipawns and hand White a big practical edge.
Does the Jerome Gambit work in practice?
Only as a trap. White scores 65.1% when Black plays the blunder Ke7 and 57.0% after Kf8 — but 45.5% after the correct Kxf7. If your opponent knows the refutation, you are simply worse from move four.
Why would anyone play the Jerome Gambit?
Shock value and fun. At club level and in rapid games, many players have never seen it. The chaos it creates can produce wild games — just understand you're betting on your opponent's ignorance, not on objective truth.
How many games feature the Jerome Gambit?
Over 483K Lichess games have reached the Jerome Gambit position. White wins 45.9%, Black wins 50.9%, with 3.2% draws — based on real rated games.