USCF player statistics
O'Brien, Peter Edward
Official US Chess record- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-492 Quick vs Regular
No national baseline for this rating band yet.
-527 Blitz vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +87
- Mar 2026 to Apr 2026
- Biggest drop
- -4
- Jun 2026 to Jul 2026
- Longest rise
- 1 update
- +87 from Mar 2026 to Apr 2026
- Current run
- 2 updates
- Unchanged since Jul 2026
- Typical move
- ±10
- Mean absolute change; spread ±29.2
Regular rating in context
United States
#15,371of 83,635 rated members · higher than 81.5%
68,241 lower · 24 same rating · 15,370 higher · ties share a rank
Illinois
#664of 4,678 rated members · higher than 85.7%
4,012 lower · 3 same rating · 663 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 6,745 within 100 points of 1,551 (this player included)
1,550–1,599: 1,475 members (1.7%) · highlighted band is the player’s · dashed line is the target
83.3% below 1,600 (69,680 of 83,635; 81.5% below 1,551)
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 | 1,551no change | 1,059no change | 1,024no change |
| Aug 2026 | 1,551no change | 1,059no change | 1,024no change |
| Jul 2026 | 1,551-4 | 1,059no change | 1,024no change |
| Jun 2026 | 1,555no change | 1,059no change | 1,024no change |
| May 2026 | 1,555no change | 1,059no change | 1,024no change |
| Apr 2026 | 1,555+87 | 1,059no change | 1,024+31 |
| Mar 2026 | 1,468no change | 1,059no change | 993 Pno change · 22 games |
| Feb 2026 | 1,468no change | 1,059no change | 993 Pno change · 22 games |
| Jan 2026 | 1,468no change | 1,059no change | 993 Pno change · 22 games |
| Dec 2025 | 1,468 | 1,059 | 993 P22 games |