The Classical, Flohr Variation is a variation of the Queen's Gambit Accepted, catalogued as ECO D28. The line runs 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7, reaching the position shown below after 26 half-moves.
White holds the centre with pawns on d5, and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each. It is White to move after 13 moves. White has castled while Black’s king is still uncommitted; Black has the bishop pair.
On the Queen's Gambit Accepted generally: Black accepts the gambit pawn but usually cannot hold it. Leads to active play for both sides.
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The Classical, Flohr Variation goes 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7. It is a variation of the Queen's Gambit Accepted and is catalogued as ECO D28.
The Classical, Flohr Variation is ECO D28. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Queen's Gambit Accepted.
Stockfish evaluates the position after 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7 at -0.15 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.
White holds the centre with pawns on d5, and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each. It is White to move. White has castled while Black’s king is still uncommitted; Black has the bishop pair.