When both players miss a win

Yes. I play in alot of tournaments. In fact I've got one today!
I'm only 11, see. I need the experience

Hi BIGMAC, That is very young to play tournaments! Do you play BCA? Is this your first year?
I started tournaments at age 12. But I did not win my first game until my 4th tournament. I got American Elo rating of 777 then. About 23 in BCA rating. But eventually I got to Expert & Master. One in tournaments. The other for Chess by correspondence, much like here. I wanted to tell you Good Luck with Chess. And I will watch for you to be Grandmaster someday.
Also to say, my friend is a FIDE Master. In one of his games with Grandmasters, he had the same thing happen as you did. He had a chance to win a whole piece vs the GM, but missed it & so the chance was gone. But the GM also missed winning that game. And they ended with a Draw. You see, it can happen to even the very best Chess players sometimes. :)
Cheers, Craig A.C.
Hi, here's one of my games from a recent tournament. Both players missed wins, but i prevailed in the endgame. Enjoy!