Two Knights Defense, Max Lange Attack


The Max Lange Attack is a chess opening that can arise from many different opening lines, including the Two Knights Defense, Petroff's Defense, Scotch Gambit, Bishop's Opening, Center Game, and Giuoco Piano. Two of the most commonly seen are 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.0-0 Bc5 6.e5, and 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.0-0 Nf6 6.e5.
The opening is named for the German master Max Lange, who suggested it in 1854.

Lines

After 6.e5, Black has two main replies. Black's 6...Ng4 is, but rarely seen. More common is 6...d5, when the main line continues 7.exf6 dxc4 8.Re1+ Be6 9.Ng5 Qd5 10.Nc3 Qf5 11.Nce4 0-0-0 with complex play.
An alternative for White is 8.fxg7 Rg8 9.Bg5, analysed by Lev Gutman and Stefan Bücker in Kaissiber, which they consider to be good for White. Black's usual response is 9...Be7 10.Bxe7 Kxe7.

Illustrative games

H. Vatter–John Nunn, 1986
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.0-0 Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be6 9.Ng5 Qd5 10.Nc3 Qf5 11.Nce4 0-0-0 12.g4 Qe5 13.fxg7 Rhg8 14.Nxe6 fxe6 15.Bh6 d3 16.c3 d2 17.Re2 Rd3 18.Nxc5 Qxc5 19.Rxd2 Ne5 20.Rxd3 cxd3 21.Kg2 Qd5+ 22.Kg3 Qd6 23.Bf4 Rxg7 24.h3 Rf7 25.Qa4 Qc6 26.Qxc6 Nxc6 ½–½