solid option for Black is the natural 5...Be7! intending ...d7–d5 (sometimes even after White plays 6.Bc4), opening up lines as soon as possible. Black also seems to get a good game with 4...g6, and 4...Bb4+ has been played successfully as well. 3.c3 3.Nf3 or 3.Bc4 Postponing recapture of the queen pawn is a standard idea in the Scandinavian Defense (1.e4 d5 2.exd5 Nf6), but 3.Nf3 is less commonly played in the Center Game. Black can safely transpose to the Scotch Game, Petrov's Defense or the Philidor Defense, or play a line recommended by Alexander Alekhine, 3...Bc5 4.Nxd4 Nf6 and now 5.e5 would be met with 5...Qe7. Similar ideas are possible after 3.Bc4, which is also uncommon. 3.Bc4 is referred to in older chess works as the Center Gambit. 3.f4?! (Halasz Gambit) The Halasz Gambit (3.f4?!) is another rare try. Although the move dates back to at least 1840, it has been championed more recently by the Hungarian correspondence player Dr. György Halasz. The gambit seems dubious but it has not been definitively refuted. References Further reading External links Tim Harding on the Halasz Gambit Tim Harding on the Center Game Chess openings