USCF player statistics
Seidler, Mason A
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 9 published updates since Jan 2026
Other formats against Regular
-19 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +154
- Mar 2026 to Apr 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 3 updates
- +156 from Feb 2026 to May 2026
- Current run
- 4 updates
- Unchanged since May 2026
- Typical move
- ±20
- Mean absolute change; spread ±54.3
Regular rating in context
United States
#51,925of 83,635 rated members · higher than 37.8%
31,665 lower · 46 same rating · 51,924 higher · ties share a rank
Illinois
#2,502of 4,678 rated members · higher than 46.4%
2,175 lower · 2 same rating · 2,501 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,373 within 100 points of 627 (this player included)
600–649: 2,641 members (3.1%) · highlighted band is the player’s · dashed line is the target
39.2% below 650 (32,836 of 83,635; 37.8% below 627)
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, with this player at their recorded rating: it is a rating comparison, not a prediction of future rank.
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 | 627 Pno change · 11 games | 608 Pno change · 11 games |
| Aug 2026 | 627 Pno change · 11 games | 608 Pno change · 11 games |
| Jul 2026 | 627 Pno change · 11 games | 608 Pno change · 11 games |
| Jun 2026 | 627 Pno change · 11 games | 608 Pno change · 11 games |
| May 2026 | 627 P+1 · 11 games | 608 Pno change · 11 games |
| Apr 2026 | 626 P+154 · 11 games | 608 P+141 · 11 games |
| Mar 2026 | 472 P+1 · 4 games | 467 Pno change · 4 games |
| Feb 2026 | 471 Pno change · 4 games | 467 Pno change · 4 games |
| Jan 2026 | 471 P4 games | 467 P4 games |
| Dec 2025 | — | — |