Polish Opening, with d5 · A00
Main line, through 1... d5
1. b4 d5
In the centre, Black holds d5.
The first 2 moves, explained
- 1. b4 Opens the c1-a3 diagonal for the bishop. Theory calls this the Polish Opening.
- 1... d5 Stakes a claim in the centre, controlling e4, and frees the bishop and queen.
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Where this fits
This line is one of 2 in the Polish Opening, with d5. If you want to know where your own games leave it, the guide on leaving theory explains how that is found.