USCF player statistics
Zalesky, Sebastian
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-1 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +71
- Jan 2026 to Feb 2026
- Biggest drop
- -1
- Mar 2026 to Apr 2026
- Longest rise
- 1 update
- +71 from Jan 2026 to Feb 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±8
- Mean absolute change; spread ±23.7
Regular rating in context
United States
19.8%of the comparison population has a lower rating.
16,560 lower · 59 same rating · 67,016 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,677 within 100 points of 349
300–349: 2,672 members (3.1%) · highlighted band is the player’s · dashed line is the target
19.8% below 350 (16,619 of 83,635; 19.8% below 349)
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: it is a rating comparison, not a prediction of future rank. This player is outside that comparison population; no membership rank is assigned.
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 | 349 Pno change · 11 games | 348 P+1 · 11 games |
| Aug 2026 | 349 Pno change · 11 games | 347 P-1 · 11 games |
| Jul 2026 | 349 Pno change · 11 games | 348 Pno change · 11 games |
| Jun 2026 | 349 Pno change · 11 games | 348 Pno change · 11 games |
| May 2026 | 349 Pno change · 11 games | 348 Pno change · 11 games |
| Apr 2026 | 349 P-1 · 11 games | 348 Pno change · 11 games |
| Mar 2026 | 350 Pno change · 11 games | 348 Pno change · 11 games |
| Feb 2026 | 350 P+71 · 11 games | 348 P+70 · 11 games |
| Jan 2026 | 279 Pno change · 6 games | 278 Pno change · 6 games |
| Dec 2025 | 279 P6 games | 278 P6 games |