15. ... Nd7
  +---+---+---+---+---+---+---+---+
8 |bR |  .|bB |  .|bQ |bR.|bK |  .|
  +---+---+---+---+---+---+---+---+
7 |  .|   |  .|bN |  .|   | b.| b |
  +---+---+---+---+---+---+---+---+
6 |   |wQ.|   |  .| b |  .|   |  .|
  +---+---+---+---+---+---+---+---+
5 | b.|   |wB.|   |  .| b |  .|   |
  +---+---+---+---+---+---+---+---+
4 |   |  .|   |  .|   |  .|   |  .|
  +---+---+---+---+---+---+---+---+
3 |  .|   | w.|   |  .|wN |  .|   |
  +---+---+---+---+---+---+---+---|
2 | w | w.|   |  .|   | w.| w | w.|

Qc6 might be a good move, or we can be dramatic and do Rxd7

That would certainly be dramatic, but I have my doubts about how smart it is. If Qxd7 comes next, you've got the queen on the empty D, which seems dangerous to me.

16 Qc6 Ra6

@Geobits It's also a loss in material - a rook for a knight.

Yeah, but I figured that part was a given. If it was for a big positional gain, I could see it being worth it. It looks to me like a material and positional loss.

Qc7 would be better than Qc6, I think.

I was looking at that one, but I'm unsure.

Could also do Qb5, but I think that leads to a loss of material. 15 Qb5 Nxc5 16 Qxe8 Rxe8. A queen and a bishop for a queen.

Well, White's 16th move could also be Qxc5.

I'm not sure I see black doing Nxc5 there.

Maybe...

Rb8 is another possibility for black at any rate.

Oooh, true.

@Geobits You can always gain back the D-file with Rd1. Or just take back with Bxf8 first.

16. Rxd7 Qxd7 17. Bxf8 Kxf8 18. Rd1 and white is still up a pawn

I was thinking Qc6 with the threat of Qxa8 next.

@PhiNotPi But then ... Ra6 attacks the queen.

nevermind then, that's true

.....guys, I can't make the next move....

Another possible sequence would be 16. Rxd7 Ra6 17. Qb8. Not sure what would happen after that.

@DLosc 17. ... Qxd7

Bad for White.

@DLosc Actually, if White did Rxd7, Black would follow up with Qxd7 because it's not attacked by any of White's other pieces.

Qxd7 or Bxd7, for that matter.