Originally posted by Sophy
What about the counter gambit greco, Levian gambit, 1 e4 -e5 2 cf3 f5.
1.e4 e5 2.Nf3 f5
A. 3.exf5 e4 4.Ne5 (4.Ng1 is interesting. Black plays a King's Gambit with an extra tempo, but does having the pawn a square further up the board help or hurt?) Nf6 5.Be2 d6 6.Bh5+ Ke7 7.Nf7 Qe8
is a typical (wild) variation. Surely you will need more analysis.
B. 3.Nxe5 Qf6 4.d4 (4.Nc4 is also an option) d6 5.Nc4 fxe4 6.Nc3 Qg6 is one of the main lines.
C. 3.Nc3 fxe4 4.Nxe5 Nf6 ?! 5.Ng4 wins a pawn.4. ... Qf6 is better.
D. 3.d4 fxe4 4.Ne5 Nf6 5.Nc3 d6 6.Bg5 is another variation where black must defend carefully.
E. 3.Bc4
This is the most exciting/fun variation. Their is a major problem with it. Most people who have not seen the gambit will play 3.Nxe5 or 3.exf5. The only players that tend to play 3.Bc4 are the ones that have actually analyzed the lines themselves. Therefore, much of the preparation in these lines will have already been seen by white.
JUST MY OPINION
3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2 is one of the more complicated lines. The positions get really crazy. Sometimes the black king walks to a6. In Kosten's book, I believe black was left in bad shape in the end.
Interestingly, 3.Bc4 b5 was invented to give the king a square in the above variation. 4.Bxg8 (instead of 4.Bb3 fxe4) makes it less fun.
3.Bc4 fxe4 5.Nxe5 d5 is another way to go.
6.Qh5+ g6 7.Nxg6 Nf6 (hxg6 is also a variation) 8.Qe5+ Be7 is another wild variation.
Many of the Latvian Gambit positions resemble nothing else on Earth. 🙂
It can be a fun exciting tactical opening.
3.Nxe5 (while not necessarily a refutation) does tend to change the whole flavor of the opening. It makes the gambit less fun to play.
For further sources on this gambit
The Latvian Gambit Made Easy is a nice introduction with 1 set repertoire for black. Don't pay more than the original $6 or so. It is very thin.
The Latvian Gambit Lives By Kosten is THE BOOK on the gambit.
There is a lot of great stuff in that one.