Game with study-like pawns vs. Bishop endgame

An interesting Alekhine Defense (theme game) I recently finished. (3day)

Not without some errors, but I thought the endgame was very instructive. 

Nice endgame!

Thanks, SmyslovFan. 

Excellent foresight on promoting the pawns twin pawns against a whole bishop advantage! The real fun starts after move 44.

After white's 25th move it's an interesting (to me) endgame. White has some weak pawns and two minorities, but with 7 pawns the black rooks will find it hard to become active. And while white's bishop and d4 pawn are at first unattractive, they prevent c5 and so black's rook (no open files) and pawn (b7) problems are not easily solved.

My blitz move would have been to keep queens on, but trading queens may actually be a serious try for a draw.

Thanks for the comments, Pikay and leiph.

@leiph - The computer suggested Qb3 or Qd1 instead of the queen trade, and evaluated the position as mostly equal, so that might have been the better drawing chance. After the trade it gives Black a small edge.

As for the rooks, their value increased as the pawns moved forward. The weren't necessarily looking for open files, but wanted to support the pawns from the rear.

The c pawn turned out not to be a problem after White swapped his a pawn (though that certainly wasn't necessary).