tony37 wrote on 02/05/13 at 18:02:08:
Is there a reason why there aren't more players using the Blumenfeld gambit as a companion to the Nimzo?
I used that combo as my first real repertoire against 1.d4. From experience, I can think of several reasons why that is not a very usual combo, and I may have chosen otherwise if I had a chance to go back (that said, I would have missed a couple of beautiful Blumenfeld wins in my youth).
1) You will not get to play the Blumenfeld very often. While this may of course vary depending on where you live, in my experience, you will face 3.Nc3 and 3.g3 somewhat more often than 3.Nf3. In addition, not everyone will play 4.d5, and there is also the d-pawn specials.
2) Even if you get to play the Blumenfeld, you will face 5.Bg5 more often than 5.dxe6. Theoretically that may not be a bad thing, but it can be a little discouraging to learn a gambit where the most usual choice for White is to decline it.
3) The Blumenfeld does not make a very natural combo with the other openings you have to learn. You have to know something rather different against 3.Nc3 and 3.g3. The NID/QID and NID/Bogo combos feel more natural, as the arising position will be rather similar. The NID/Benoni combo is less natural in that sense, but at least, the Benoni makes a weapon against both 3.Nf3 and 3.g3.
For these reasons, I am reluctant to recommend the Blumenfeld as a repertoire opening. It makes more sense to use it as a supplement once you have a comfortable repertoire based on 1...Nf6/2...e6.
Oh, and one final point: If you like the Blumenfeld, it is quite likely that you will like the Benko as well. And if you play the Benko, you will probably get it in the majority of your 1.d4 games.