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 C01

ECO C00–C99 — Open Games and the French Defense: 1.e4 e6 and 1.e4 e5, from the Italian and Ruy Lopez to the King's Gambit.

4 named opening lines are classified under ECO code C01.

French Defense: Exchange Variation — 1.e4 e6 2.d4 d5 3.exd5
French Defense: Exchange Variation, Bogoljubow Variation — 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5 Nc6
French Defense: Exchange Variation, Monte Carlo Variation — 1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4
French Defense: Exchange Variation, Svenonius Variation — 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5 exd5 5.Bg5