Tough Loss

Ughhh... I played a solid, solid game last night. It was against someone about 100 points my senior on FICS, and he started with a very unusual opening for me (1. Nf3). I let the computer analyze it for about 4 hours... the game was so solid that in 28 moves neither of us had more than a one point advantage.

Then, of course, I just totally blow it... I left a knight hanging, and he instantly snatched it up.

I, am of course, very frustrated. I am trying to look at the positive (i.e., I played an otherwise A-Class game), but I sweart blunders like this just haunt me.