diagonal has been fatally weakened and 6.Qf3 wins a . Trying to defend the pawn by 3...Be6 may hold on to the pawn, but White has good compensation after 4.Ne2. 3.Nc3 3.Nc3 was labelled "misguided" by Raetsky and Chetverik, because the development does not control d4 and e5, and the knight is vulnerable to a b-pawn advance from Black. 3...e5, 3...Nf6, and 3...a6 are all reasonable replies, and 3...Nc6 leads to a standard line in the Chigorin Defense. 3. Nc3 was recommended by Keene and Jacobs in their opening repertoire for White. 3.Qa4+ The queen check by 3.Qa4+ Nc6 4.Nf3 will quickly regain the pawn with Qxc4, but the early development of the queen allows Black to win time by harassing it, so this line is rarely played. References Further reading External links Annotated Chess - Queen's Gambit Accepted Chess openings