you could have played for a win with 0 risk, seems very hard for white to draw if he can even draw.
actually, i think white can draw only with accurate play upon farther analysis.
for example, 38. Kb1 Rb6+ 39. Ka1? Rf6 40. Kb1 Rf1+ 41. Kc2 Kxa2 42. Rxg4 Rf2+ 43. Kc1 Kb3 and he is almost busted, if not losing.
39.Kc2! Kxa2 40. Rxg4 Rb2+ 41. Kc1 Kb3 42. Rxc4! draws
doesn't hurt to play on here either you are against a weak opponent, ... Rc2+ 43. Kd1 Rxg2 44. Rc8 a4
im going to say a 1500 standard player on chess.com is going to easily crumble under pressure and blunder.
I had a tricky endgame situation that was very drawish. If I (as black) went RE5 and he took my RG4 then I would follow up with RE3 threatening checkmate, but not sure where the game would go from there.
Note that he was up a pawn, but if I never went RE5 then he could not take any of my stuff without giving up a piece, and continuing to move my king instead would force a draw.
The computers all tell me Rb6+ was the right follow-up move to 37 ..e6 38. b1 but it seemed risky. Should I have tried to go for the win?