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ECO D78

ECO D00–D99 — Closed and Semi-Closed Games: 1.d4 d5 queen's pawn openings and the Grünfeld Defense.

1 named opening lines are classified under ECO code D78.

Neo-Grünfeld Defense: Classical Variation, Original Defense — 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 c6 6.O-O d5