The Rooks Swap Line is a variation of the Polish Opening, catalogued as ECO A00. The line runs 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1, reaching the position shown below after 11 half-moves.
The four central squares are empty of pawns, so the fight for them is being conducted by pieces. Development is level at one minor pieces each. It is Black to move after six moves. The a-file file is fully open.
On the Polish Opening generally: An unusual flank opening with 1.b4. Aims for long-term pressure on the queenside.
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The Rooks Swap Line goes 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1. It is a variation of the Polish Opening and is catalogued as ECO A00.
The Rooks Swap Line is ECO A00. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Polish Opening.
Stockfish evaluates the position after 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1 at -0.03 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
The four central squares are empty of pawns, so the fight for them is being conducted by pieces. Development is level at one minor pieces each. It is Black to move. The a-file file is fully open.