USCF player statistics
Mostovoy, Idan
Official US Chess record- FIDE
- FIDE 0
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
+13 Quick vs Regular
No national baseline for this rating band yet.
+44 Blitz vs Regular (provisional)
No national baseline for this rating band yet.
-97 Online Regular vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- —
- No gain between published updates yet
- Biggest drop
- -27
- Apr 2026 to May 2026
- Longest rise
- —
- No consecutive gains yet
- Current run
- 4 updates
- Unchanged since May 2026
- Typical move
- ±3
- Mean absolute change; spread ±9
Regular rating in context
United States
#53,491of 83,635 rated members · higher than 35.9%
30,094 lower · 51 same rating · 53,490 higher · ties share a rank
Illinois
#2,590of 4,678 rated members · higher than 44.5%
2,084 lower · 5 same rating · 2,589 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,633 within 100 points of 598 (this player included)
550–599: 2,691 members (3.2%) · highlighted band is the player’s · dashed line is the target
36.1% below 600 (30,195 of 83,635; 35.9% below 598)
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 | Online Regular |
|---|---|---|---|---|
| Sep 2026 | 598no change | 611no change | 642 P+1 · 18 games | 501 Pno change · 11 games |
| Aug 2026 | 598no change | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Jul 2026 | 598no change | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Jun 2026 | 598no change | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| May 2026 | 598-27 | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Apr 2026 | 625no change | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Mar 2026 | 625no change | 611no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Feb 2026 | 625no change | 611-1 | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Jan 2026 | 625no change | 612no change | 641 Pno change · 18 games | 501 Pno change · 11 games |
| Dec 2025 | 625 | 612 | 641 P18 games | 501 P11 games |