USCF player statistics
Killingsworth, Mason
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 9 published updates since Jan 2026
Other formats against Regular
-20 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +92
- Mar 2026 to Apr 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 2 updates
- +134 from Mar 2026 to May 2026
- Current run
- 4 updates
- Unchanged since May 2026
- Typical move
- ±17
- Mean absolute change; spread ±33.8
Regular rating in context
United States
#49,575of 83,635 rated members · higher than 40.6%
34,013 lower · 48 same rating · 49,574 higher · ties share a rank
Tennessee
#725of 1,158 rated members · higher than 37.3%
433 lower · 1 same rating · 724 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,093 within 100 points of 674 (this player included)
650–699: 2,499 members (2.9%) · highlighted band is the player’s · dashed line is the target
42.2% below 700 (35,335 of 83,635; 40.6% below 674)
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 | 674 Pno change · 22 games | 654no change |
| Aug 2026 | 674 Pno change · 22 games | 654no change |
| Jul 2026 | 674 Pno change · 22 games | 654no change |
| Jun 2026 | 674 Pno change · 22 games | 654no change |
| May 2026 | 674 P+42 · 22 games | 654+48 |
| Apr 2026 | 632 P+92 · 15 games | 606 P+78 · 18 games |
| Mar 2026 | 540 Pno change · 5 games | 528 Pno change · 8 games |
| Feb 2026 | 540 Pno change · 5 games | 528 Pno change · 8 games |
| Jan 2026 | 540 P5 games | 528 P8 games |
| Dec 2025 | — | — |