About this opening
Grünfeld Defense: Three Knights Variation, Burille Variation is an opening in the Encyclopedia of Chess Openings,
classified under code D94. ECO group D (D00–D99)
covers closed games and semi-closed games beginning 1.d4 d5, covering the Queen's Gambit, Slav, Grünfeld and related queen-pawn structures. This particular variation is reached
after 9 half-moves from the
starting position, with the move sequence 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3.
It belongs to the Grünfeld Defense family.
Within that family this is a level-2 branch (the Three Knights Variation → Burille Variation line). The immediate parent line is Grünfeld Defense: Three Knights Variation, transitioned via 5.e3.
The opening sequence in prose form: 1.d4 Nf6, 2.c4 g6, 3.Nc3 d5, 4.Nf3 Bg7, 5.e3. From this position exactly one named continuation is recorded in the encyclopaedia.