People abilities climb and descend. Maybe you were in your prime at that time. You'll never always be at your A game, but you can try your best. Plus sometimes people are stronger than their rating on chess.com.
Why do I lose it so fast?
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Just an interesting thought, in my chess.com life I was as high as 1320s (which isnt great but not awful) I then for some strange reason just started losing to everybody. Got down to a 1095. Had to re buy books and study again now I am back to 1271. But how does that happen? I mean I am the same player its odd I was like 1300 and losing to 10 and 1100s for like a 2 weeks stretch.