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Australian Defense A40

A — Flank openings · Family: Australian Defense

1. d4 Na6

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The Australian Defense is catalogued under the ECO code A40. Its main line runs 1. d4 Na6.

After 2 half-moves the diagrammed position is reached and it is White to move. Material is balanced.

Play through the moves on the board above, explore the variations tree below — click any move of any branch — then test yourself against the engine from the position you picked.

• Position after 2 half-moves — White to move.
• Material is balanced.
• Family “Australian Defense” contains 1 recorded variation(s) here.

Variations tree of the Australian Defense family

Click any move to jump to that position; switch branches at any point with the alternative moves. Test your knowledge plays the shown position against the engine.

Related openings

Nearby ECO codes in the A — Flank openings volume — compare the move orders:

• English Defense (A40)
• Englund Gambit (A40)
• Englund Gambit Declined (A40)
• Horwitz Defense (A40)
• Mikenas Defense (A40)
• Polish Defense (A40)