USCF player statistics

Koo, Calvin

USCF 16403447CaliforniaUpdated: Dec 2025

US Chess membership expired on July 31, 2022. Published rating history is still shown below.

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Rating format

Regular rating

1,976

Published rating · Dec 2025 · 1 published update since Dec 2025

Dec 20251,976 Regular
Dec 2025: 1976
Dec 2025
1 update in this window · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity

Other formats against Regular

  • -596 Quick vs Regular

    No national baseline for this rating band yet.

  • -486 Blitz vs Regular

    No national baseline for this rating band yet.

  • -315 Online Regular vs Regular (provisional)

    No national baseline for this rating band yet.

Published ratings by month

P marks a provisional rating; the small figure is the change since the previous published observation.

Monthly USCF ratings for Koo, Calvin
MonthRegularQuickBlitzOnline Regular
Dec 20251,9761,3801,4901,661 P21 games
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About these statistics. Built from the monthly USCF rating updates available to Chess67. Ratings change between publications, and a missing month is not inactivity. The official US Chess record has current ratings and tournament history.