It was, according to your opponent analisys, very instructive, indeed...

I think I prefer 16...b6, which doesn't weaken the c6-pawn quite as much.

I prefer 16 ...Nf5 since the b7 pawn is poisoned!! i.e. 16 ...Nf5 17.Rxb7? Nd6!

Nice idea and the knight is more actively placed here too.

White can afford to attack relentlessly without any second thoughts about weakening the pawns around the own king. There is nothing black could do here. Good move!

Thank you, just following Steinitz rule that knights MUST be deprived of forward support points. In other words... the knight must not be allowed to sit happily in the center throwing his influence around. However, I had no plan for 19 ...Qg6  

Qg6, QxN, plainly... and painly  

This is a painful stage of the game for black. Practically a lost game, unless white makes a serious mistake, still not at the point to resign just yet. If black wants to try any counterplay, I think it should revolve around his a-pawn. 21...cxb5 instead of Rab8 and black does have the passed a-pawn. Okay, it is isolated, only a rook pawn, weak and not advanced. But at least you have a rook behind it. No, it is not enough to save the game, if white doesn't make a mistake. But it is probably a slight chance to hang on to.

An instructive game from which I learned a bit more about this rarely played opening. Thanks for taking your time and annotating the game for us!

Thank you Gavin for an excellent annotation!