USCF player statistics
Koroknay, Jeffery W
Official US Chess record- FIDE
- FIDE 0
- US Chess reported rank
- #43,042 national · #2,158 in state
- Floor
- Regular 150 · Quick 150
US Chess record as of Sep 15, 2026
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-55 Quick vs Regular
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +57
- Jun 2026 to Jul 2026
- Biggest drop
- -80
- Mar 2026 to Apr 2026
- Longest rise
- 1 update
- +57 from Jun 2026 to Jul 2026
- Current run
- 2 updates
- Unchanged since Jul 2026
- Typical move
- ±16
- Mean absolute change; spread ±34.7
Regular rating in context
United States
#51,581of 83,635 rated members · higher than 38.2%
32,007 lower · 48 same rating · 51,580 higher · ties share a rank
Florida
#2,669of 4,396 rated members · higher than 39.2%
1,724 lower · 4 same rating · 2,668 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,338 within 100 points of 634 (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; 38.2% below 634)
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 | 634no change | 579no change |
| Aug 2026 | 634no change | 579no change |
| Jul 2026 | 634+57 | 579+67 |
| Jun 2026 | 577-9 | 512-13 |
| May 2026 | 586no change | 525no change |
| Apr 2026 | 586-80 | 525no change |
| Mar 2026 | 666no change | 525no change |
| Feb 2026 | 666no change | 525no change |
| Jan 2026 | 666no change | 525no change |
| Dec 2025 | 666 | 525 |