How often have you read blogs or books where the point being made is that one side is winning, if both sides play perfectly. Well, they don't! Which is why Magnus Carlsen is still on "only" 2871, and the best computers at 3200 or something.
We are humans, we make mistakes, we think of the wrong things and we do not always see what is right in front of us.
My latest slow chess at my local club is a prime example. My esteemed opponent is roughly at my level; he beats me in blitz and I mostly beat him in slow chess.
In this game, I made a massive mistake in the opening, not paying attention to the slight difference in position compared to the usual opening I play (French), but since neither of us are computers, there was a lot of mistakes on both sides for a while - which made it very entertaining! Some comments have been added throughout the game, hope you enjoy it.
(This is basically a useful way for me to review and annotate my games.)