Known as the Botvinnik Variation. Is one of the most tactical positions I have discovered. Mco 14 mentions how tactical it is; Every site I have visited that has comments available says the same. If you want a position to ponder over day and night, see it in your dreams..Possess your soul.. start analysis on this one:

1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 e6 5.Bg5 dxc4 6.e4 b5 7.h6 Bh4 8.g5 Nxg5 9.hxg5 Bxg5

Blacks usual response is 10. ..Nbd7 with 11.exf6 Bb7.
Lets chew on this one a while! Todd

This very interesting variant and but pra to play it has that to be with strong inspiration.

12.g3 c5 13.d5 Qb6 14.Bg2 O-O-O 15.O-O b4

Which play you prefer now?

16.Tb1 or Ca4 or dxe6