USCF player statistics

Mackin, Seamus

USCF 32588959New YorkLatest available supplement: Sep 2026
Official US Chess record
Rating format

Regular rating

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550675800Dec 2025: 612 (provisional)Jan 2026: 723 (provisional)Feb 2026: 722 (provisional)Mar 2026: 723 (provisional)Dec 2025Mar 2026
Published supplement ratings. Lines connect available observations; they do not show individual tournament results.

Published ratings by supplement

All available formats. P indicates a provisional rating.

Monthly USCF ratings for Mackin, Seamus
SupplementRegularQuick
Sep 2026——
Aug 2026——
Jul 2026——
Jun 2026——
May 2026——
Apr 2026—590 P
Mar 2026723 P710 P
Feb 2026722 P709 P
Jan 2026723 P710 P
Dec 2025612 P599 P

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About these statistics

These pages use the USCF supplements available to Chess67. Ratings can change between monthly publications. Missing months do not mean a player was inactive. For current ratings and tournament history, consult the official US Chess record.

National USCF statisticsNew York USCF statistics