Paddy wrote on 09/05/06 at 15:00:06:
Willempie wrote on 09/04/06 at 09:51:19:
I am currently going though the d4-book by Cox and am now working on the QG (20 years too late

) and found myself wondering a bit about the issue of move orders and transpositions (they are much harder for me than after 1e4).
I was wondering a bit about some move-order issues:
-1.d4 d5 2.c4 e6 3.Nc3 dxc4, now it looks like 4.e4 is best but then iirc this transposes to a QGA with 3 e4 line of which I know next to nothing. So what's the idea after eg 4.e4 c5 5.d5 (I think) exd5 6.Nxd5
-1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 Be7. Cox mentions that this transposes to a passive version of the QGD, but from my limited knowledge both Be7 and c6 are quite standard in a Lasker and the other variation whose name eludes me. So what would be a proper way to "exploit" this?
(...)
So could anyone give me some pointers on these minor issues?
The classical theory of the Queen's Gambit maintains that after 1 d4 d5 2 c4 e6 Black can equalise if he can play ...c5 without disadvantage, which explains why in the main lines of the QGD Orthodox Defence we find White trying to put so much pressure on d5 that ...c5 is not playable, and why we also see Black trying to delay committing himself to ...c6, because he would really prefer to play ...c5.
In contrast, when Black plays an early c6 it will be because, instead of simply trying to equalise, he is going for the alternative approach of creating counterplay, with one of these plans: a) he's thinking of playing dxc4 and then ...b5 (as in most variations of the Semi-Slav) ; or b) he's thinking of playing ...Qa5 (as in the Cambridge Springs), trying to take advantage of the absence from the queenside of White's dark-squared bishop.
The first approach (equalise before trying to win) held sway more or less up to the 1940s. The second (sod equalising, I'm going for counterplay!) became more popular when dynamic players (generally but not exclusively associated with the Soviet hegemony post WW2) showed that it could be successful in practice, even if it did not neatly fit the classical theory. Both strategies are valid and can still be discerned in the games of contemporary grandmasters.
[The above description is very "broad brush" and no doubt there are a lot of exceptions and caveats but I think such simplifications are useful sometimes to understand how ideas have developed and to give a shape to history.]
In conclusion, and back on topic, a combination of, for instance, an early ...c6 and ...Be7 would thus constitute a rather dysfunctional mixture of strategies.
I think that's a very nice description. The main exception/caveat I can think of is ...c6 in the Capablanca (Orthodox) variation, which is played basically in preparation for the freeing maneouvre ...dc and ...Nd5 (in line with the old/classical approach).
This reminds me of one of the things that struck me as suspicious about Black's (a Swedish teenager whose performance rating in this event was reportedly 2575) opening play when I glanced at the game below. That is, when Black is using the Meran-type approach (i.e. Paddy's "a" above), he should generally get on with it before completing K-side development.
[Event "Pardubice"]
[Site ""]
[Date "2006.??.??"]
[Round "8"]
[White "Lindberg, Bengt"]
[Black "Blomqvist, Erik"]
[Result "0-1"]
[WhiteElo "2385"]
[BlackElo "2133"]
[NIC "SL 1.4.11"]
[ECO "D11"]
[PlyCount "84"]
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 e6 5. g3 Be7 6. Bg2 O-O 7. Nc3 dxc4 8. Qxc4 b5
9. Qb3 Bb7 10. O-O a6 11. Rd1 Nbd7 12. Be3 Qc7 13. Rac1 Rac8 14. Bf4 Qb6 15. e4 Rfd8
16. h3 c5 17. d5 c4 18. Qc2 exd5 19. e5 Nh5 20. Ng5 g6 21. Be3 Bc5 22. Bxc5 Rxc5
23. Nxd5 Bxd5 24. Bxd5 Nxe5 25. Qe4 Nf6 26. Qe3 Rdxd5 27. Rxd5 Nxd5 28. Qxe5 Nf6
29. Qd4 Qc6 30. h4 Rd5 31. Qa7 Rd7 32. Qb8 Kg7 33. Re1 h6 34. Nh3 Qf3 35. Qe5 Rd2
36. a3 Qb3 37. Nf4 Qxb2 38. Qe7 Rxf2 39. Ne6 Kh8 40. Nf4 Qd4 41. Kh1 Kg8 42. Qb7
Qd2 0-1