I have two comments about the first game.
First, of course you shouldn't take the bishop on f7 on your 54th move... But I am not sure you could save the game at that point already.
Second, your opponent had a big mistake on move 28 by playing Re8. d8Q is much more powerful then.
hi, i just played these two games in live chess, one of them i won and the other one i didn't. In the game I lost I'd be interested to know at what point I went seriously wrong. What moves should I have played etc? I think I still had a chane of a draw or even winning if I hadn't taken the bishop towards the end, what do you think?