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 B04

ECO B00–B99 — Semi-Open Games other than the French: 1.e4 answered by the Sicilian, Caro-Kann, Scandinavian, Alekhine, Pirc and more.

6 named opening lines are classified under ECO code B04.

Alekhine Defense: Modern Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3
Alekhine Defense: Modern Variation, Alburt Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6
Alekhine Defense: Modern Variation, Keres Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4
Alekhine Defense: Modern Variation, Larsen Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5
Alekhine Defense: Modern Variation, Larsen-Haakert Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nc6
Alekhine Defense: Modern Variation, Schmid Variation — 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6