Alekhine's Defence – Krejcik Variation arises after 1.e4 Nf6 2.Bc4. ECO code: B02.

White develops the bishop to c4, targeting f7. However, after 2...Nxe4, Black wins a pawn, as 3.Bxf7+ Kxf7 gives White insufficient compensation. The variation is considered dubious for White.