Richter-Veresov Attack: Two Knights System

An entry in the Encyclopedia of Chess Openings (ECO D01), reached after 7 half-moves: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3.

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4…g6 1 line
- D01 Grünfeld Defense

About this opening

Richter-Veresov Attack: Two Knights System is an opening in the Encyclopedia of Chess Openings, classified under code D01. 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 7 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3.

It belongs to the Richter-Veresov Attack family. Within that family this is a sub-variation (the Two Knights System line).

The opening sequence in prose form: 1.d4 Nf6, 2.Nc3 d5, 3.Bg5 Nbd7, 4.Nf3. From this position exactly one named continuation is recorded in the encyclopaedia.