King's Gambit: what should Black play?

The position reached after e4 e5 f4 defines the King's Gambit, categorized under ECO code C30. In this highly theoretical opening, the most statistically successful and engine-recommended response for Black is exf4, which accepts the gambit and challenges White to prove compensation for the sacrificed f4. This move is played in 41.0% of the 95 million recorded games at this position and carries an engine evaluation of -0.57, indicating a slight advantage for the second player.

The King's Gambit Accepted

Accepting the pawn with exf4 is the most critical test of White's setup. By removing the f4, Black creates immediate tactical threats, particularly involving the h4 square. The main line often continues exf4 Bc4 Nc6 d4 Qh4+ Kf1, where White forfeits castling rights in exchange for central control and development. Despite White scoring 54.5% from this position, the engine prefers Black's prospects due to the exposed nature of the White e1.

The Falkbeer Counter-Gambit and Classical Declines

Players seeking to avoid the complications of the accepted lines often choose d5, known as the Falkbeer Counter-Gambit. This move is played in 9.3% of games and results in a nearly equal evaluation of -0.18, with White scoring 49.0% in the line d5 exd5 exf4 Nf3 Nf6 c4. Alternatively, the most popular way to decline the gambit is Nc6, seen in 24.3% of games. This developing move leads to an evaluation of +0.05, maintaining a balanced struggle after Nc6 Nf3 exf4 d4 g5 d5.

Positional Alternatives

Other solid options include the Classical Decline with Bc5 or the modest d6. The move Bc5 prevents White from castling easily and leads to a score of 51.0% for White following Bc5 Nf3 d6 c3 Nf6 fxe5. While d6 is played in 13.1% of games, it is slightly more passive, allowing White a 54.9% scoring percentage after d6 d3 Nc6 Nf3 g6 fxe5.