A bit unusual endgame (KRpp vs. KNppp): draw or lost?

Hello all, I've recently run into one pretty unusual (at least for me) endgame and I have a bit of a problem with its evaluation. It arose at move 50 in a game that I include above (I was black), where I faced a choice between defending KRBppp vs. KRNppp endgame, where white has a passed pawn and sacrificing an exchange for the passed pawn. Since both I and my opponent were in a time pressure, I went for the latter choice, basing my decision on a fact that it felt optically better of the two choices.

The thing is that although the game was eventually drawn, I wonder whether it was a wise decision or not and I have no idea how to analyse such an endgame - since I have never studied winning methods for R vs. N in an endgame with some pawns left.

My father and friends (all of whom are under 2000 players) were surprised that the game was drawn after the exchange sacrifice - they thought that I will likely lose. My opponent thought that the endgame was winning until the move 64.h5, probably through playing hxg5. As for me, I don't know, but it sort of feels like that black should be able to hold it.

So is here someone more experienced in endgames, who could give me a definite answer on this?

I am not person you are looking for but looks like a draw to me.  Maybe you can check it with program & find out if the was a draw or not.  

Well, the thing about positions like this is that the computer has a problem analysing them - after h5 the analysis shows +1.58 basically continually, but no hint of how to win it. So it's hard to assess it like that.

You said your opponent thought White was winning before 64.h5. What other choice was there? If 64.hxg5+ hxg5, there are only seven men left and the tablebases will give you the theoretical result, a draw.

R+K vs R+N is, in most cases, dead drawn ending. If you find a way to exchange 3 pawns for those 2, it should be drawn.

Should be a draw.

One way you can check is with the engine. Just make the computer play against itself, and if it's a win, it's a win, and if it's a draw, it's a draw. 

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