I've just finished a game in this site and I'd like to know if I missed any chances in the endgame. We got to an early endgame in the Queen's Gambit Accepted.
At first I had a slight material advantage (knight and bishop for a rook), but my pieces lacked coordination. I ended up returning the material in exchange for the bishops pair, which might have been good enough for a win, since there were pawns on both sides of the board. Then I tried to win material with a little combination, but I missed a strong reply by white - I did win a pawn, but it was a doubled a-pawn (pretty useless, I'd say). In the final position, with bishop against knight, I'm probably slightly worse. The game was drawn.
Could you guys point out my mistakes in the ending? Where did I miss the win, if there ever was any?