The Latvian Gambit (or Greco Counter Gambit) is a chess opening characterized by the moves:
1.e4 e5 (King's Pawn Opening)
2.Nf3 f5 (King's Knight Opening)
This opening has the appearance of a King's Gambit with colours reversed.
Latvian Gambit Accepted
Latvian Gambit Declined
White's third move continues 3.Nxe5 is the main line.
3... Qf3 is a good way.
After this, white has 2 options d4or Nc4.