The tricky part of the BDG Ryder Gambit is revealed most clearly when Black plays as below with 5…Qxd4 6.Be3 Qb4 attacking b2. White castles 7.0-0-0. The tempting blunder 7…Bg4? leaves Black in deep trouble as Fred Haley demonstrates. Earlier in 2016 I wrote about the Real Dr. Ryder BDG story.
My Blackmar-Diemer Tactics with 500 combinations and mates.
Haley (1864) - nisapradila (2313), Chess.com, 06.12.2016 begins 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Be3 Qb4 [6...Qg4!] 7.0-0-0
7...Bg4? [7...c6 8.Qg3 g6 9.a3 Qa5 10.Nf3 Bg7 11.Bc4 0-0 12.Rhe1 b5 13.Bb3 Nbd7 14.Kb1=; 7...e6 8.Nb5 Qa5 9.Bd2 Qb6 10.Be3 Bc5 11.Bxc5 Qxc5 12.Qa3 Qc6 13.Rd6=; 7...a6 8.Qg3 Qa5 9.Bf4 Nc6 10.Bxc7 Qh5 11.Be2=; 7...Nc6 8.Nb5 Qa5 9.Bd2 Qb6 10.Be3 Qa5=] 8.Nb5 Nbd7 [8...Na6 9.Qxb7 Qe4 (9...Bxd1 10.Qxa8+ Kd7 11.Nxa7 Be2 12.Qc8+ Kd6 13.Bd2+-) 10.Qxa6 Qxe3+ 11.Kb1 Qc5 12.Qb7 Bxd1 13.Qxa8+ Kd7 14.Nc3+-; 8...e5 9.Nxc7+ Ke7 10.Qxb7 Qxb7 11.Bc5#] 9.Qxb7 Qe4 10.Qxa8+ [10.Qxe4! Nxe4 11.Rd4+-] 10...Qxa8 11.Nxc7+ Kd8 12.Nxa8 Bxd1 13.Kxd1 Kc8 14.g3 e5 15.Bg2 e4 16.Bf4 h6 [16...Kb7 17.Nh3 Kxa8 18.Ng5 Kb7 19.Nxf7+-] 17.h4 Kb7 18.Nc7 a6 19.c4 Bc5 20.Nd5 Ng4 21.Nh3 f5 22.Kc2 Bd4 [22...Nb6 23.Nxb6 Kxb6 24.Rd1+-] 23.Rd1 Bc5 24.b4 Ba7 25.a4 [Or 25.Ne7 Ndf6 26.Nxf5+-] 25...Rc8 [25...Re8 26.c5 Nde5 27.Bf1+-] 26.Kb3 g6 [26...Re8 27.Ne3 Nxe3 28.Rxd7+ Kc8 29.Rc7+ Kd8 30.Rxa7+-] 27.Ne7 Nb6 [27...Rd8 28.Rd6 Ne3 29.Bxe3 Bxe3 30.Nd5+-] 28.Nxc8 Nxc8 29.c5 Kc6 30.Kc4 Ne7 31.b5+ axb5+ 32.axb5+ Kb7 33.Rd7+ 1-0
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