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Chess Opening Theory/1. d4/1...b5
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Polish defence A40 Queen's pawn opening
1...b5 · Polish defence
Black prepares their queen's side bishop to be fianchettoed, and Black's pawn on b5 prevents White from playing c4.
However, this allows 2. e4 and White is able to occupy the centre with both pawns.
Theory table
References
See also
Polish Defence
Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. 1-8574-4221-0.
Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. 0-8129-3084-3.
fi:Shakkiaapinen/Peli/1. d4/1...b5