Why did he resign?


Out of interest, how Is 15 Qxe5 a better position? After 15 ... Qxe5 16 Rxe5 Rxd2, Black is a bishop up

Out of interest, how Is 15 Qxe5 a better position? After 15 ... Qxe5 16 Rxe5 Rxd2, Black is a bishop up
And after that, Bxc6! gives white the better position.

His rating was low 1400s

actually, just checked out his profile (click on "My Complete Profile") and it seems that he has closed his account. Maybe he resigned because he was leaving the site...
Out of interest, how Is 15 Qxe5 a better position? After 15 ... Qxe5 16 Rxe5 Rxd2, Black is a bishop up
And after that, Bxc6! gives white the better position.
Not really. 15...Qxe5 16.Rxe5 Rxd2 17.Bxc6 Rb2 18.gxf4 Rxc2 black is just better. (18.Rae1 Bg4 is even worse for white, he probably has to take on f4).
Black is the only one who can hope to win this.
The funny thing is, black is MUCH better in the final position (Qxe5 WAS white's best move, even if black is better there).
15.Bxf4? Bxf4 16.gxf4 Bf5
Black is a pawn up, his pieces can become more active (thanks to the ...b4 idea in many lines), and has the safer king. I have no idea why in the world he decided to resign.

silentfilmstar13, just look a couple more moves down your suggested line:
6.Be4 Rxb2 7.gxf4
(I guess that using the pin was your original idea. Unfortunately: 7.Bf5? Bxf5! 8.Rxb8 f3 and it looks like game over.
(9.Rf1 Rg2+ 10.Kh1 Rxa2, or
9. Rd8 Bh3 10.Rdd1 f2+ 11.Kh1 b4 - threatening things like creating a second passed pawn on the queenside, or, more importantly, maneuvers such as Bc8-b7+. White can't move.))
Back to 7.gxf4 The pin along the 8th rank may look troubling, but 7...Re2 this counter pin threatens f5.
8.f5 (forced, as an exchange of rooks after Bc6 is fatal for white) b5! ignoring the pin altogether. I can't find any way for white to use it or make it hurt black in any way.
9.Rc1 a5 (the counterpin really helps.. Black looks like he should win this).
I got to this position in a game when he resigned.
What i see happening is:
is there some way i can force a win?