Another Recent Teichmann Defense

We tend to see a lot of Teichmann Defenses to the Blackmar-Diemer Gambit, especially from players who don't play the white side of the BDG that much themselves. Here's another recent one, of interest because White plays the 8.Qf2 line and then castles queenside, which is almost never seen in this variation. Larsen,Bjorn - Hansen,SoO (1682) Baltic Sea Cup Bornholm DEN (4), 31.Jul.2008 BDG, Teichmann Defense 1.d4 Nf6 2.Nc3 d5 3.e4 dxe4 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.Qf2 e6

9.Bd2 The game considered the Stammpartie of this variation went 9.Bd3 Bb4 10.0-0 0-0 11.Qh4 Nbd7 12.Bg5 Re8 13.Rf3 Be7 14.Raf1 g6 15.Rxf6 Nxf6 16.Bxf6 Bxf6 17.Rxf6 Kg7 18.Ne4 Qxd4+ 19.Kh1 Qxb2 20.c3 Qa3 21.Qf4 Qe7 22.Qe5 Kg8 23.Ng5 Rf8 24.Bc4 b5 25.Bb3 a5 26.Rxe6 1-0 Ciesielski-Friedrich, correspondence 1972 (Game 1972 in BDG WORLD 63) 9...Be7 10.0-0-0 0-0 11.Bd3 Nbd7 12.g4 b5 13.Qh4 Ne4 14.g5² Nxg5 15.Rdg1 h6 16.Qg3 Qb8 17.Bf4 e5 18.dxe5 Ne6 19.h4 Bf6??

Better is 19...Re8 20.Bf5 (20.Bxh6 Qxe5) 20...Bf8 20.exf6 Qxf4+ 21.Qxf4 Nxf4 22.Rxg7+ Kh8 23.Rh7+ Kg8 24.Rg1+ Ng6 25.Bxg6 fxg6 26.Rxd7 Rxf6 27.h5 g5 28.Ne4 Rf4 29.Nxg5 hxg5 30.Rxg5+ Kh8 31.Rgg7 Rh4? 32.Rh7+ Kg8 33.h6

33.Rdg7+ Kf8 34.Rg1+- is a faster win. 33...Rg4 34.Rhf7 Rd8? 34...Rg6 holds out longer: 35.h7+ Kh8 36.Rxa7 Rxa7 37.Rxa7 Rg1+ 38.Kd2 Rh1 35.h7+ 1-0 35...Kh8 36.Rxd8+ Rg8 37.Rxg8#