ECO volume A: Flank openings

ECO A64

One named opening is classified as A64. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.

Benoni Defense: Fianchetto Variation, Hastings Defense, Main LineA641. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8