Chess opening ECO A89-next post-theory-games-videos

Chess opening theory on en.wikibooks.org- A89: Dutch Defence, Leningrad Variation main line 7...Nc6: 1. d4 f5 2. c4 Nf6 3. g3 Nf6 3. g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6

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