Glenn Snow wrote on 06/11/11 at 23:34:52:


Supporting your opinion, I can say that transposing in another setup (with 2...g6) might occur, too..
A corr game I still play as a second player began with these moves:
1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. e3 O-O 5. Bd3 d5 6. Nc3 c5 7. O-O cxd4 8. exd4 Nc6.. where white has to fight for =

Most people seem to lump the Colle and the Zukertort together. The Colle, with d4 e3 and c3, is a poor opening in that it blocks in white's dark squared bishop and doesn't attack the center actively enough.

The Zukertort is much more playable, with white playing b3 (or even occasionally b4) and opening up the long diagonal for the queen's bishop.

I agree with Markovich's sentiment about the Colle, but the Zukertort can be played to good effect by masters, as Yusupov and others have shown.

Markovich wrote on 06/11/11 at 21:39:33:

Up to 2100 and still playing the Colle?

But on topic, I think that 3...c5 is a strong and critical rejoinder to 2.Nf3, 3.e3.  That b4 line is a dream come true for Black.  I'm not saying that it's not a game of chess, but man, White is handing Black major winning chances on a silver platter.

FWIW, Bronzik's line is actually an attempted transposition into a Tarrasch Defense, Normal Variation, which White has the option of playing as a reversed QGA.  But here Black benefits from is QN not yet being committed to c6.

But if Black wants to draw, then 6...dxc5 is an excellent rejoinder to 6.a3, since White is playing an inferior version of the 7.dxc5 QGA.

Anonymous3 wrote on 06/27/10 at 06:08:37:


He gives 4.dxc5!? as his main line and then 4...e6 5.b4!? a5 6.c3 axb4 7.cxb4 b6 8.Bb5+ Bd7 9.Bxd7+ Nbxd7 10.a4! bxc5 11.b5 "exciting position... rather unclear." A Noteboom or Abrahams reversed.
He calls 3...c5 "challenging". "... White has often replied too timidly. Solid players may be happy with 4.c3 and 5.Nbd2, but the fascinating 4.dxc5!? looks like the best way to pose Black problems."

Btw. Valeri Bronznik (The Colle-Koltanowski-System) too gives 4.dxc5!? as main line. He continues it with 4...e6 5.c4 Bxc5 6.a3!? but calls 5.b4 a5 6.c3 (Summerscale) interesting.