Right again! Not only because of the now half-open f-file, but also to be able to challenge White's centralized knight with ...Nf7.
Stopping White's a4-a5 once and for all (though at the moment . . . b6-b5 seems a suitable response), not minding the b5 -square and the now backward b6-pawn. Black has a clear follow-up in mind though.
A fine post for the knight, from where it aims at the blocked a4-pawn and also supports the central advance of the e-pawn. After some adventures, the game ended in a draw.
Concrete chess. What counts is - as always- what will remain on the board after this surprising exchange. After White's next it becomes clear that Black's weak pawn on b7 will be increasingly hard to defend.
Of course, with a big positional plus for White Black remained under severe pressure, but Yilmaz was lucky enough to escape with a draw.