Among the oldest countergambits in the King's Gambit Declined is the Panteldakis Countergambit, 1.e4 e5 2.f4 f5?!, known from a game played in 1625 in which Gioachino Greco used it to win with the Black pieces. It is nonetheless considered dubious because 3. exf5 with the threat of Qh5+ gives White a good game.
| Game | Result | Year |
| Kennaugh, Charles (2290) vs Shirazi, Kamran G (2438) | 0-1 | 2003 |