USCF player statistics
Coffin, Isaac Joseph
Official US Chess record- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-125 Quick vs Regular
No national baseline for this rating band yet.
-988 Online Regular vs Regular (provisional)
No national baseline for this rating band yet.
-998 Online Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +96
- Dec 2025 to Jan 2026
- Biggest drop
- -18
- Aug 2026 to Sep 2026
- Longest rise
- 2 updates
- +55 from Mar 2026 to May 2026
- Updates that moved
- 5 of 9
- Latest -18, Aug 2026 to Sep 2026
- Typical move
- ±21
- Mean absolute change; spread ±33.5
Regular rating in context
United States
#8,561of 83,635 rated members · higher than 89.7%
75,050 lower · 25 same rating · 8,560 higher · ties share a rank
Ohio
#285of 2,416 rated members · higher than 88.1%
2,130 lower · 2 same rating · 284 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 5,756 within 100 points of 1,766 (this player included)
1,750–1,799: 1,186 members (1.4%) · highlighted band is the player’s · dashed line is the target
90.6% below 1,800 (75,823 of 83,635; 89.7% below 1,766)
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 | Online Regular | Online Quick |
|---|---|---|---|---|
| Sep 2026 | 1,766-18 | 1,641-13 | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Aug 2026 | 1,784+20 | 1,654+57 | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Jul 2026 | 1,764no change | 1,597no change | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Jun 2026 | 1,764no change | 1,597+1 | 778 Pno change · 10 games | 768 Pno change · 7 games |
| May 2026 | 1,764+36 | 1,596no change | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Apr 2026 | 1,728+19 | 1,596+42 | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Mar 2026 | 1,709no change | 1,554no change | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Feb 2026 | 1,709no change | 1,554no change | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Jan 2026 | 1,709+96 | 1,554+128 | 778 Pno change · 10 games | 768 Pno change · 7 games |
| Dec 2025 | 1,613 | 1,426 | 778 P10 games | 768 P7 games |