if (window.location.hostname == "chessmind.ai" && !window.location.pathname.startsWith('/embed/')) { document.write('<iframe src="https://www.googletagmanager.com/ns.html?id=GTM-TS8C2C58" height="0" width="0" style="display:none;visibility:hidden"></iframe>'); }

ECO A81

ECO A00–A99 — Flank openings: 1.c4, 1.Nf3, 1.f4 and other first moves, plus early Indian and Benoni systems.

5 named opening lines are classified under ECO code A81.

Dutch Defense: Blackburne Variation — 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nh3
Dutch Defense: Fianchetto Attack — 1.d4 f5 2.g3
Dutch Defense: Leningrad Variation, Carlsbad Variation — 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nh3
Dutch Defense: Leningrad, Basman System — 1.d4 f5 2.g3 c6 3.Bg2 g6 4.Nf3 Bg7 5.O-O Nh6
Dutch Defense: Semi-Leningrad Variation — 1.d4 f5 2.g3 Nf6 3.Bg2 g6