Chess opening · ECO D90
Grünfeld Defense: Three Knights Variation
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1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7
Grünfeld Defense: Three Knights Variation is catalogued under ECO code D90. It is reached after 4 moves (8 half-moves): 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7. After the last move it is White to play. White opens 1. d4. It is a named variation of the Grünfeld Defense, which has 59 catalogued lines in total. 1 deeper line continue from here, listed below.