IBM

H. Donner (2500)

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1971.07
1/2 : 1/2

Hans Ree (2430)

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1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.cxd5 Nxd5 6.Bd2 c5 7.Rc1 Nxc3 8.bxc3 cxd4 9.Nxd4 O-O 10.e3 Qd5 11.Qb3 Qxb3 12.axb3 Bd7 13.Be2 Nc6