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Nimzo-Indian Defense: Bishop Attack, Classical Defense

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Ne2 c5 7.cxd5 cxd4 8.exd4 Nxd5 9.O-O
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