Contre-gambit Lemberg

D00 gambit Blackmar – Diemer, contre-gambit Lemberg 1.d4 d5 2.Cc3 Cf6 3.e4 e5
D00 gambit Blackmar – Diemer, contre-gambit Lemberg 1.d4 d5 2.e4 dxe4 3.Cc3 e5