USCF player statistics
Mariyappan, Shabarna
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+2 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +197
- Jan 2026 to Feb 2026
- Biggest drop
- -57
- Jun 2026 to Jul 2026
- Longest rise
- 4 updates
- +358 from Jan 2026 to May 2026
- Updates that moved
- 9 of 9
- Latest -3, Aug 2026 to Sep 2026
- Typical move
- ±51
- Mean absolute change; spread ±75.4
Regular rating in context
United States
57.8%of the comparison population has a lower rating.
48,350 lower · 37 same rating · 35,248 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 8,067 within 100 points of 991
950–999: 2,074 members (2.4%) · highlighted band is the player’s · dashed line is the target
58.2% below 1,000 (48,741 of 83,635; 57.8% below 991)
How these comparisons are calculated
Chess67 calculations from the Sep 2026 monthly rating update, using the same population as the USCF statistics pages: US members classified as active in the published monthly records, excluding lifetime-coded records, provisional ratings included. Ties share a rank; “lower” is strictly lower; national and state groups overlap. The target explorer keeps the population fixed: it is a rating comparison, not a prediction of future rank. This player is outside that comparison population; no membership rank is assigned.
Published ratings by month
P marks a provisional rating; the small figure is the change since the previous published observation.
| Month | Regular | Quick |
|---|---|---|
| Sep 2026 | 991-3 | 993-3 |
| Aug 2026 | 994-4 | 996-5 |
| Jul 2026 | 998-57 | 1,001-54 |
| Jun 2026 | 1,055-7 | 1,055-17 |
| May 2026 | 1,062+84 | 1,072+77 |
| Apr 2026 | 978+47 | 995+60 |
| Mar 2026 | 931+30 | 935+32 |
| Feb 2026 | 901+197 | 903+198 |
| Jan 2026 | 704-27 | 705-27 |
| Dec 2025 | 731 | 732 |