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The original was posted on /r/todayilearned by /u/RealisticBarnacle115 on 2024-11-12 20:08:52+00:00.

Original Title: TIL that a study shows wearing a mask decreased the quality of chess players’ decisions—a measure of their cognitive performance. However, the disruptive effect of masks is relatively short-lived, gradually weakening so that there is no measurable disadvantage after roughly 4 hours of play.