Note that after 10.Bf4 (instead of 10.Kf2), Black would not play 10...Nxf4??, which would still allow 11.Qa4+, winning a piece.
Bemærk, at sort efter 10.Lf4 (i stedet for 10.Kf2), ikke ville spille 10...Sxf4??, hvilket stadig ville tillade 11.Da4+ med gevinst af en officer.