The main idea for black is to force e5, for instance by playing Qc7 first.
When black arives at this position unscathed he is fine. All the nice things you can do from here are fine of course, but the bane of a patzer like me is 99% of the time: how to punish uncoöperating opponents who are not willing to understand that resistance before this position by is useless?
So I intent to post about opponents who commit the heresy to deviate from this main line early. First I treat two irritating gambits.
Irritating wing gambit at move 2.
1.d4 f5 2.g4
Black to move
This can't be good of course, yet I have encountered it once long ago and lost. It looks a bit like a wing gambit on the kingside. I would choose for the simplest positional continuation: 2. . . . fxg4 3.h3 g3!? 4.fxg3 Nf6 5.Nc3 d5 6.Bge e6 and black is ready to press on the weak g3 square with Bd6.
If white wants to avoid g3 he can play 3.Bf4 Nf6 4.h3 d5 5.Nc3 Nc6 6.Nb5 e5 7.dxe5 Nh5 8.Bh2 g3 9.fxg3 a6 10.Nxc7 Qxc7 11 g4 Qb6 and white is in trouble.
Or white can play 3.e4 d5 4.e5 Bf5 and black is fine with being a pawn up.
Irritating Staunton gambit at move 2.
1.d4 f5 2.e4
Black to move
2. . . . fxe4 and now white has two possibilities:
A. 3.f3 B. 3.Nc3
The mainlines are given. The order of the moves can change which gives a bunch of variations, but the idea's are the same.
A. 3.f3 If you like to defend you can accept the pawn of course. But this does look way too much alike the Alapin Diemer gambit which I play myself. So if there is a decent way to decline I would prefer that. 3. . . . d5 4.fxe4 dxe4 5.Bc4 Nf6 6.Ne2 e5! 7.c3 Nc6 8.O-O Bg4 and blacks position is acceptable.
B. 3.Nc3 Nf6 4.Bg5 c6 5.f3 d5 6.fxe4 dxe4 7.Bc4 Bg4 8.Ne2 Nd7 9.O-O Nb6 10.Bb3 Qd7 and black is ok.
I haven't encountered these gambits in internet games yet. I publish this because that helps me to remember how to play. Secondly to discourage possible gambit players to play these variations since they prove to be futile. My next posts will probably cover my first experiences with the Leningrad Dutch in cc-games. Focussing on irritating early deviations that took me off guard and how to play them well.