A42 is the opening Modern Defense: Averbakh System of the volume A · Flank openings: 7 half-moves to the position in the diagram, 6 variations in the ECO table.
What the games say
4,126 games in the collections, from 1856 to 2022. Mean rating of the games with ratings: 2407.
White wins 42 %, draws 32 %, Black wins 26 %
Most games: Azmaiparashvili, Zurab (68), Todorcevic, Miodrag (68), Gaprindashvili, Nona (54), Badea, Bela (53), Lehtinen, Heikki (51)
All 6 variations
- Modern Defense: Averbakh System 1.d4 g6 2.c4 ♗g7 3.♘c3 d6 4.e4
- Modern Defense: Averbakh Variation, Pseudo-Sämisch 1.d4 g6 2.c4 ♗g7 3.e4 d6 4.♗e3 ♘f6 5.f3
- Modern Defense: Kotov Variation 1.d4 g6 2.c4 ♗g7 3.♘c3 d6 4.e4 ♘c6
- Modern Defense: Randspringer Variation 1.d4 g6 2.c4 ♗g7 3.♘c3 d6 4.e4 f5
- Pterodactyl Defense 1.♘f3 c5 2.c4 g6 3.d4 ♗g7 4.e4 ♕a5+ 5.♘c3 d6
- Pterodactyl Defense: Central, Bogolubovia 1.d4 g6 2.c4 ♗g7 3.e4 d6 4.♘c3 c5 5.♘ge2 ♕a5