From Chesspedia, the Free Chess Encyclopedia.
The Budapest Defence is a chess opening beginning with the moves
- 1.d4 Nf6
- 2.c4 e5.
With his second move Black launches an immediate strike on White's centre, sacrificing, at least temporarily, a pawn to do so. White most often will not cling to the extra pawn since that ties his pieces to defense and often gives Black a lead in development. Instead White usually develops his pieces and hopes to gain a lead in development while Black spends time regaining his pawn. After 3.dxe5 (the only serious try for an advantage) Black must move his knight again. 3...Ne4!? (the Fajarowicz Variation), a true gambit, is occasionally seen.
More common is 3...Ng4, when play most often continues 4.Bf4 (the greedy 4.Qd4!? d6 5.exd6 Bxd6 6.Nf3 (6.Qxg7?? Be5) 0-0 7.Bg5! is little-seen but playable) Nc6 5.Nf3 Bb4+ 6.Nbd2 (6.Nc3 Qe7 7.Qd5!? is possible, when Black's best is the gambit 7...f6 8.exf6 Bxc3+! 9.bxc3 Nxf6, followed by attacking White's weak doubled c-pawns) Qe7 7.a3 Ngxe5! 8.Nxe5 (the opening's detractors have called the famous trap 8.axb4?? Nd3# "the only reason to play the Budapest") Nxe5 9.e3! Bxd2+ 10.Qxd2 with a small advantage for White.
The Budapest Defence is rarely played in top-level chess, but it is occasionally seen at amateur levels
- Harding, Tim (December 1997). The Kibitzer: How Stands the "Faj"?. ChessCafe.com.
- Harding, Tim (November 2000). The Kibitzer: Playing the Budapest in Budapest (PDF). ChessCafe.com.