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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86m - 7…O-O 8.Ne2 Nc6 9.O-O b6 - Classical Exchange Simagin Improved [+0.49], SÉRIE D
1952 POL-ch10 – Round 20 – Gadalinski, Jan – 0-1 – Sowinski, Jerzy – G142

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86k - 7…O-O 8.Ne2 Nc6 9.O-O - Classical Exchange Simagin Improved [+0.42], SÉRIE D
1952 POL-ch10 – Round 8 – Boleslawski Zbigniew – 1/2-1/2 – Plater, Kazimierz – G55

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86i - 7…O-O 8.Ne2 b6 9.O-O - Classical Exchange Simagin [+0.19], SÉRIE D
1952 Rio de Janeiro – Round 8 – Szentkiralyi Toth, Vince – 0-1 – Trifunovic, Petar – G42

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86m - 7…O-O 8.Ne2 Nc6 9.O-O b6 - Classical Exchange Simagin Improved [+0.49], SÉRIE D
1952 Saltsjobaden Interzonal – Round 7 – Sanchez Alpizar, Luis Alberto – 1/2-1/2 – Pachman, Ludek – G66

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86j - 7…O-O 8.Ne2 Nc6 9.Be3 - Classical Exchange Simagin Improved [+0.20], SÉRIE D
1952 Tatranska ch CZE – Round 11 – Kottnauer, Cenek – 0-1 – Sajtar, Jaroslav – G29

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86g - 7…O-O 8.Ne2 Nc6 - Classical Exchange Simagin Improved [+0.41], SÉRIE D
1953 Bucharest – Round 7 – Spassky, Boris Vasily – 1/2-1/2 – Sajtar, Jaroslav – G70

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86h - 7…O-O 8.Ne2 b6 9.h4 - Classical Exchange Simagin [+1.06], SÉRIE D
1953 CSR Ch Prague – Round 8 – Pachman, Ludek – 1/2-1/2 – Sajtar, Jaroslav – G46

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86h - 7…O-O 8.Ne2 b6 9.h4 - Classical Exchange Simagin [+1.06], SÉRIE D
1953 CSR Ch Prague – Round 9 – Alster, Ladislav – 0-1 – Filip, Miroslav – G53

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- D80-D99 Gruenfeld defence1. d4 Nf6 2. c4 g6 3. Nc3 d5, D86 - 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 - Gruenfeld [+0.31], D86g - 7…O-O 8.Ne2 Nc6 - Classical Exchange Simagin Improved [+0.41], SÉRIE D
1953 HUN Ch Budapest HUN – Round 1 – Borloy, Karoly – 1-0 – Navarovszky, Laszlo – G23

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