The upcoming sacrifice is well known to theory and Kasparov must have known about it (in fact, there are some reports that he even wrote an article supporting 8.Nxe6 as a refutation).
Det kommende offer er velkendt fra teorien og Kasparov må have kendt det (der foreligger rapporter om, at han endda har skrevet en artikel, der anbefaler 8.Sxe6 som gendrivelse af varianten).