USCF player statistics
Claiborne, Mark
Official US Chess record- Biggest rank climb · #82 in Oregon (Blitz)
- Top rated · #41 in Oregon (Blitz)
- Top rated · #78 in Oregon (Quick)
- TD
- N
- Floor
- Regular 1,600 · Quick 1,400 · Blitz 1,400
US Chess record as of Sep 15, 2026
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-71 Quick vs Regular
No national baseline for this rating band yet.
-35 Blitz vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- —
- No gain between published updates yet
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- —
- No consecutive gains yet
- Current run
- 9 updates
- Unchanged since Dec 2025
- Typical move
- ±0
- Mean absolute change; spread ±0
Regular rating in context
United States
#9,554of 83,635 rated members · higher than 88.5%
74,051 lower · 31 same rating · 9,553 higher · ties share a rank
Oregon
#129of 1,492 rated members · higher than 91.3%
1,363 lower · 1 same rating · 128 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 6,047 within 100 points of 1,728 (this player included)
1,700–1,749: 1,684 members (2%) · highlighted band is the player’s · dashed line is the target
89.2% below 1,750 (74,637 of 83,635; 88.5% below 1,728)
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 | Blitz |
|---|---|---|---|
| Sep 2026 | 1,728no change | 1,657no change | 1,693no change |
| Aug 2026 | 1,728no change | 1,657no change | 1,693no change |
| Jul 2026 | 1,728no change | 1,657no change | 1,693no change |
| Jun 2026 | 1,728no change | 1,657no change | 1,693no change |
| May 2026 | 1,728no change | 1,657no change | 1,693no change |
| Apr 2026 | 1,728no change | 1,657no change | 1,693no change |
| Mar 2026 | 1,728no change | 1,657no change | 1,693no change |
| Feb 2026 | 1,728no change | 1,657no change | 1,693no change |
| Jan 2026 | 1,728no change | 1,657no change | 1,693no change |
| Dec 2025 | 1,728 | 1,657 | 1,693 |