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D00 Blackmar Diemer Gambit

Blackmar-Diemer Gambit: Ryder Gambit (6.Nb5)

Emil Joseph Diemer vs NN, 1950

1-0, 11 moves

[Event "SMX Kelheim"]
[Site "SMX Kelheim"]
[Date "1950.??.??"]
[EventDate "1950.??.??"]
[Round "?"]
[Result "1-0"]
[White "Emil Joseph Diemer"]
[Black "NN"]
[ECO "D00"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "21"]
1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Nb5 Qd8 7.Bf4 Na6 8.Rd1 Nd7 9.Qe3 b6? 10.Bxc7 Nxc7 11.Nd6# 1-0 6.Nb5!? is an interesting alternative to the mainline 6.Be3 of the Ryder Gambit. Diemer mentioned this game in his book "Das moderne Blackmar-Diemer Gambit" (p.27) in which he states Black refutes after Euwe's move 6...Qe5+! followed by 7.Be2! Na6 8.Nc3 Nb4!. r1b1kb1r/ppp1pppp/5n2/4q3/1n6/2N2Q2/PPP1B1PP/R1B1K1NR w KQkq - 0 9 Another example game from Diemer with 6.Nb5: [Event "Lindau"]
[Site "Lindau"]
[Date "1950.??.??"]
[EventDate "1950.??.??"]
[Round "?"]
[Result "1-0"]
[White "Emil Joseph Diemer"]
[Black "Klaus Locher"]
[ECO "D00"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "24"]
1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Nb5 Qb6 7.Be3 c5 8.Bf4 Na6 9.a4 Qc6 10.Nd6+ Kd8 11.Nxf7+ Ke8 12.Bb5 1-0 leading to the won position: r1b1kb1r/pp2pNpp/n1q2n2/1Bp5/P4B2/5Q2/1PP3PP/R3K1NR b KQ - 0 12

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