USCF player statistics
Szostek, Jan
Official US Chess recordRegular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-137 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +124
- Mar 2026 to Apr 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +124 from Mar 2026 to Apr 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±14
- Mean absolute change; spread ±41.3
Regular rating in context
United States
#34,926of 83,635 rated members · higher than 58.1%
48,662 lower · 48 same rating · 34,925 higher · ties share a rank
Illinois
#1,597of 4,678 rated members · higher than 65.8%
3,081 lower · 1 same rating · 1,596 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 8,048 within 100 points of 998 (this player included)
950–999: 2,074 members (2.4%) · highlighted band is the player’s · dashed line is the target
58.2% below 1,000 (48,741 of 83,635; 58.1% below 998)
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 | 998no change | 861 Pno change · 17 games |
| Aug 2026 | 998no change | 861 Pno change · 17 games |
| Jul 2026 | 998no change | 861 Pno change · 17 games |
| Jun 2026 | 998no change | 861 Pno change · 17 games |
| May 2026 | 998no change | 861 Pno change · 17 games |
| Apr 2026 | 998+124 | 861 Pno change · 17 games |
| Mar 2026 | 874 Pno change · 22 games | 861 Pno change · 17 games |
| Feb 2026 | 874 Pno change · 22 games | 861 P-1 · 17 games |
| Jan 2026 | 874 Pno change · 22 games | 862 Pno change · 17 games |
| Dec 2025 | 874 P22 games | 862 P17 games |