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来自维基百科,自由的百科全书
國際象棋開局百科(Encyclopaedia of Chess Openings),簡稱ECO,是《國際象棋通報》自1966年開始推出,以代碼表示的國際象棋開局分類的編目索引,把所有開局分為A、B、C、D、E五大類,每一類又下分為00-99,共一百個小類,例如C89是西班牙開局馬歇爾棄兵[1]。廣泛運用在各種電腦軟件與國際象棋棋書。
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