Colle-Zukertort Powerbook 2019

Colle-Zukertort is the name of a set-up in which White starts with 1.d4 but then does not continue with c4 and does not develop his bishop on c1. Instead, White continues with Nf3, e3, Bd3 and Nbd2. If White now plays c3 we reach the original Colle-set-up, if White plays b3 we reach Zukertort structures. In both variations White does not really strive for an opening advantage and therefore there are only a few games by top players with this set-up. However, one should not underestimate White’s set-up. Colle is like a Semi-Slav with colours reversed and an extra tempo for White. The Powerbook shows a slight plus for White in both systems, in the Colle and in the Zukertort. Some lines are based on hundreds of computer games and can easily be studied in the Powerbook. The almost 58,000 games with a rating-minimum of 2300 are of a much higher level than the Colle-Zukertort games in the Mega Database.

In the main line of the Colle (1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.c3 Nc6 6.Nbd2 Bd6 7.0-0 0-0 8.dxc5 Bxc5

the Powerbook shows striking statistics after the move 9.b4!, which also trends in human games. But the Powerbook contains about 1500 games with the position after 9.b4 Bd6 10.Bb2 and you can easily study it in depth – these are ten times as many games as you find in the Mega Database and the Correspondence Database together.

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