Also, it's usually later at night when I hang pieces or get forked or fall prey to some dumb trick I should have seen coming and become Tilt-y McTitlface and just start losing badly.
Discovered Attack: I play a lot better when I'm not tired.
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It should probably go without saying, but I think about half my losses are me playing when my brain is too tired to process stuff. I should probably stop playing rated games after 10 or 11 at night.