Saturday, August 1, 2020

Blackmar-Diemer Gambit Stockfish

Stockfish played the Blackmar-Diemer Gambit as a predetermined opening in the Top Chess Engine Championship against Leela Chess Zero (LCZero). Stockfish won the 100 game match but drew BDGs. The games began 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 (Ziegler Defence also reached via a Caro-Kann Defence. LCZero had played 6.Bc4. Stockfish chose the alternative 6.Bd3. After 6...Bg4 it resembles a 5…Bg4 Teichmann, but the later bishop move alters the development and attacking options.

Stockfish – LCZero, TCEC18 Superfinal INT, 23.06.2020 begins 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 6.Bd3 Bg4 7.Be3 e6 8.h3 [Or 8.Qe2 Nbd7 9.h3 Bh5 10.0–0–0=] 8...Bh5 9.Qe2 Bb4 10.a3 Ba5 [10...Bxc3+ 11.bxc3 Nbd7 12.0–0=] 11.g4 Bxc3+ 12.bxc3 Bg6 13.0–0 0–0 14.Bf4 Nd5
15.Bg5!? [15.Bd2=] 15...Bxd3 16.cxd3 [16.Qxd3 Qc7=+] 16...Nxc3 17.Qe1 f6 18.Bh4 Nd5 19.Qxe6+ Kh8 20.Ne5 Qe8 21.Qxe8 Rxe8 22.Nf7+ Kg8 23.Nd6 Re7 24.Rae1 b6 [24...b5 25.Re4 a5 26.Rfe1 Rxe4 27.dxe4 with some compensation.] 25.Rxe7 Nxe7 26.g5 Ng6 27.Re1 Nd7 28.gxf6 Nxf6 29.Bxf6 gxf6 30.Kf2 Rd8 31.Re6 Nf4 32.Rxf6 Rf8 33.Rxf8+ Kxf8 34.Nc8 Ke8 35.Nxa7 Kd7 36.h4 Kc7 37.Kf3 Nxd3 38.Ke4 Nf2+ 39.Kf3 Nd1 40.d5 cxd5 41.Nb5+ Kc6 42.Nd4+ Kd6 43.Kf4 Nc3 44.Kg5 [44.h5!?] 44...Ke5 45.Nc6+ Kd6 [45...Ke4!?] ½–½

Blackmar-Diemer Gambit (974 BDG games ebook collection)
Chess Games Collection (10 non-BDG game Kindle ebooks)
Chess Puzzle Collection (combines 7 easy checkmate ebooks)
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