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FM Andrey Terekhov's Two Knights Defense repertoire on Chessable uses this variation against 4.d3. That repertoire deserves to be more widely known: it's one of the best on Chessable, the author updates it frequently, and it's free! In the introductory text of 4.d3 h6 he notes: In the beginning, this line has been mostly used as a surprise weapon, but in ...


2

I think the name for 4. Ng5 is Knight Attack. There isn't a specific name, because it leads to more specific openings, like the Fried Liver Attack, Polerio Defense 4. Ng5 d5 5. exd5 Na5 (trying to prevent the sacrifice), the Traxler Countergambit 4. Ng5 Bc5, and more. It's just like how 1. e4 e5 is called the open game. There isn't a specific name for it, ...


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