In the Danish, especially Alexander Alekhine applied 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Nxc3, but on unimportant occasions.
Александр Алехин применял 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Кxc3 на маловажных встречах.