Efim Bogoljubow played the Queens Knight Defence 1.d4 Nc6 at least nine times. The first time Bogo played it was against Fritz Saemisch in 1920. In the early years, Bogoljubow won every game with it as Black. In his later years, Bogo drew three times.
Heinz Ullrich was a strong enough chess player to face several famous masters. Expectedly Ullrich lost most of those games. The typical variation after 1.d4 Nc6 2.d5 Ne5 is 3.e4 e6 4.f4 Ng6. When White played 3.f4 Ng6 4.e4 it allowed the possibility of e5 (rather than 4…e6) which Grandmaster Bogoljubow exploited.
Efim Dmitriyevich Bogoljubow was born in Russia. The German master E.J. Diemer spelled his name Bogoljubow as it is often seen in English. The Russian spelling of his name is Bogoljubov. Bogoljubow was trapped in Germany when World War I broke out. He married a German girl and moved to Germany by 1926. There he lived until his death in 1952. Alexander Alekhine won World Championship matches against Bogoljubow (in 1929 and in 1934).
Ullrich - Bogoljubow, Bad Elster 1937 begins 1.d4 Nc6 2.d5 Ne5 3.f4 Ng6 4.e4 e5 [4...e6 5.dxe6] 5.f5? [5.dxe6 see 4...e6] 5...Qh4+! 6.Kd2 [6.Ke2 Qxe4+ 7.Be3 Bc5 8.Qc1 Nf4+ 9.Kf2 Nf6! 10.Bxc5 Ng4+ 11.Kg3 Nh5+ 12.Kh3 Qxf5-+ and White cannot avoid being mated in six or seven more moves.] 6...Qxe4 [More accurate is 6...Nf6! 7.Qf3 Nxe4+ 8.Ke2 Nf4+ 9.Bxf4 Qxf4 10.Qxf4 exf4 11.Kf3 Nf6 12.Nc3 Bb4 13.Bd3 g5 14.fxg6 hxg6-/+] 7.Bd3? [White should take the piece with 7.fxg6 Qxd5+ 8.Ke1 Qxd1+ 9.Kxd1 hxg6 10.c4= when Black has three pawns for the knight.] 7...Qxg2+ 8.Ne2 Qg5+ [8...Nh4 9.Qf1 Nf3+ 10.Kc3 Qxf1 11.Rxf1 Nxh2-+] 9.Kc3 Qh4 10.a3 [10.b3 N6e7-+] 10...N6e7 11.Kb3 [11.Ng3 b5-+] 11...e4 12.Bxe4 Qxe4 13.Nbc3 Qxf5 14.Nd4 Qg6 15.Ndb5 Kd8 16.Bf4 d6 17.Nxc7 [17.Rg1 Qf5-+] 17...Kxc7 18.Nb5+ Kd8 19.Bxd6 Nf5 20.Bc7+ Kd7 21.Rg1 Ne3 22.Qf3 [22.Qe2 Qxc2+ 23.Qxc2 Nxc2 24.Kxc2 a6-+] 22...Qxc2+ 23.Ka2 Qc4+ 24.Kb1 Qxb5 25.Qxf7+ Ne7 26.Qe6+ Kxc7 27.Rc1+ Nc6 0-1
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