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All ECO codes · A · Flank openings

A40 Australian Defense

A40 Australian Defense8a7b6c5d4e3f2g1h
1.d4 ♘a6

A40 is the opening Australian Defense of the volume A · Flank openings: 2 half-moves to the position in the diagram, 52 variations in the ECO table.

What the games say

6,420 games in the collections, from 1849 to 2022. Mean rating of the games with ratings: 2444.

White wins 36 %, draws 33 %, Black wins 31 %

Most games: Kengis, Edvins (86), Miles, Anthony J (75), Eingorn, Vereslav S (69), Bunzmann, Dimitrij (60), Czebe, Attila (59)

All 52 variations

  1. Australian Defense 1.d4 ♘a6
  2. Benoni Defense: Franco-Sicilian Hybrid 1.d4 e6 2.c4 c5 3.d5 exd5 4.cxd5 d6 5.♘c3 g6 6.e4 ♗g7 7.♘f3 ♘e7
  3. Borg Defense: Borg Gambit 1.d4 g5
  4. Colle System: Pterodactyl Variation 1.d4 g6 2.♘f3 ♗g7 3.e3 c5 4.♗d3 ♕a5+
  5. Colle System: Siroccopteryx Variation 1.d4 g6 2.♘f3 ♗g7 3.e3 c5 4.♗d3 cxd4 5.♘xd4 ♕a5+
  6. English Defense 1.d4 b6
  7. English Defense 1.d4 e6 2.c4 b6
  8. English Defense: Eastbourne Gambit 1.d4 b6 2.c4 ♗b7 3.♘c3 e5
  9. English Defense: Hartlaub Gambit Accepted 1.c4 e6 2.d4 b6 3.♘c3 ♗b7 4.e4 f5 5.exf5 ♘f6
  10. English Defense: Hartlaub Gambit Declined 1.c4 e6 2.d4 b6 3.♘c3 ♗b7 4.e4 f5 5.d5
  11. English Defense: Perrin Variation 1.d4 e6 2.c4 b6 3.e4 ♗b7 4.♗d3 ♘c6
  12. English Defense: Poli Gambit 1.d4 e6 2.c4 b6 3.e4 ♗b7 4.f3 f5 5.exf5 ♘h6
  13. Englund Gambit 1.d4 e5
  14. Englund Gambit Declined 1.d4 e5 2.d5
  15. Englund Gambit Declined: Diemer Counterattack 1.d4 e5 2.d5 ♗c5 3.e4 ♕h4
  16. Englund Gambit Declined: Reversed Alekhine 1.d4 e5 2.♘f3
  17. Englund Gambit Declined: Reversed Brooklyn 1.d4 e5 2.♘f3 e4 3.♘g1
  18. Englund Gambit Declined: Reversed French 1.d4 e5 2.e3
  19. Englund Gambit Declined: Reversed Krebs 1.d4 e5 2.♘f3 e4
  20. Englund Gambit Declined: Reversed Mokele Mbembe 1.d4 e5 2.♘f3 e4 3.♘e5
  21. Englund Gambit: Felbecker Gambit 1.d4 e5 2.dxe5 ♘c6 3.♘f3 ♗c5
  22. Englund Gambit: Hartlaub-Charlick Gambit 1.d4 e5 2.dxe5 d6
  23. Englund Gambit: Main Line 1.d4 e5 2.dxe5 ♘c6 3.♘f3 ♕e7
  24. Englund Gambit: Mosquito Gambit 1.d4 e5 2.dxe5 ♕h4
  25. Englund Gambit: Soller Gambit 1.d4 e5 2.dxe5 f6
  26. Englund Gambit: Soller Gambit Deferred 1.d4 e5 2.dxe5 ♘c6 3.♘f3 f6
  27. Englund Gambit: Stockholm Variation 1.d4 e5 2.dxe5 ♘c6 3.♘f3 ♕e7 4.♕d5
  28. Englund Gambit: Zilbermints Gambit 1.d4 e5 2.dxe5 ♘c6 3.♘f3 ♘ge7
  29. Horwitz Defense 1.d4 e6
  30. Horwitz Defense: Zilbermints Gambit 1.d4 e6 2.c4 e5
  31. Kangaroo Defense 1.d4 e6 2.c4 ♗b4+
  32. Kangaroo Defense: Keres Defense, Transpositional Variation 1.d4 e6 2.c4 ♗b4+ 3.♘c3
  33. Mikenas Defense 1.d4 ♘c6
  34. Mikenas Defense: Cannstatter Variation 1.d4 ♘c6 2.c4 e5 3.d5 ♘d4
  35. Mikenas Defense: Lithuanian Variation 1.d4 ♘c6 2.c4 e5 3.d5 ♘ce7
  36. Mikenas Defense: Pozarek Gambit 1.d4 ♘c6 2.c4 e5 3.dxe5 ♘xe5 4.♘c3 ♘xc4
  37. Modern Defense: Beefeater Variation 1.d4 g6 2.c4 ♗g7 3.♘c3 c5 4.d5 ♗xc3+ 5.bxc3 f5
  38. Modern Defense: Lizard Defense, Pirc-Diemer Gambit 1.d4 g6 2.h4 ♘f6 3.h5
  39. Montevideo Defense 1.d4 ♘c6 2.d5 ♘b8
  40. Polish Defense 1.d4 b5
  41. Polish Defense: Spassky Gambit Accepted 1.d4 b5 2.e4 ♗b7 3.♗xb5
  42. Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl 1.d4 g6 2.c4 ♗g7 3.♘c3 c5 4.d5 d6 5.e4 ♗xc3+ 6.bxc3 ♕a5
  43. Pterodactyl Defense: Central, Benoni Pterodactyl 1.d4 g6 2.c4 ♗g7 3.e4 c5 4.d5 ♕a5+
  44. Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl 1.d4 g6 2.c4 ♗g7 3.♘c3 c5 4.d5 ♕a5
  45. Pterodactyl Defense: Fianchetto, Queen Pteranodon 1.d4 g6 2.c4 ♗g7 3.♘c3 c5 4.d5 ♗xc3+ 5.bxc3 ♕a5
  46. Pterodactyl Defense: Fianchetto, Queen Pterodactyl 1.d4 g6 2.♘f3 ♗g7 3.g3 c5 4.♗g2 ♕a5+
  47. Pterodactyl Defense: Queen Pterodactyl, Quiet Line 1.d4 g6 2.c4 ♗g7 3.♘c3 c5 4.e3
  48. Queen's Pawn Game 1.d4
  49. Queen's Pawn Game: Anglo-Slav Opening 1.d4 c6 2.c4 d6
  50. Queen's Pawn Game: Modern Defense 1.d4 g6
  51. Slav Indian: Kudischewitsch Gambit 1.d4 c6 2.♘f3 ♘f6 3.c4 b5
  52. Zaire Defense 1.d4 ♘c6 2.d5 ♘b8 3.e4 ♘f6 4.e5 ♘g8