USCF player statistics
Groboske, Cohen M
Official US Chess record- FIDE
- FIDE 0
Regular rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-3 Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +150
- Feb 2026 to Mar 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +150 from Feb 2026 to Mar 2026
- Current run
- 6 updates
- Unchanged since Mar 2026
- Typical move
- ±18
- Mean absolute change; spread ±49.7
Regular rating in context
United States
#57,056of 83,635 rated members · higher than 31.7%
26,522 lower · 58 same rating · 57,055 higher · ties share a rank
California
#6,451of 9,051 rated members · higher than 28.6%
2,594 lower · 7 same rating · 6,450 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,888 within 100 points of 531 (this player included)
500–549: 2,741 members (3.2%) · highlighted band is the player’s · dashed line is the target
32.8% below 550 (27,504 of 83,635; 31.7% below 531)
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 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| Aug 2026 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| Jul 2026 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| Jun 2026 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| May 2026 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| Apr 2026 | 531 Pno change · 22 games | 528 Pno change · 22 games |
| Mar 2026 | 531 P+150 · 22 games | 528 P+149 · 22 games |
| Feb 2026 | 381 Pno change · 22 games | 379 Pno change · 22 games |
| Jan 2026 | 381 P+9 · 19 games | 379 P+10 · 19 games |
| Dec 2025 | 372 P19 games | 369 P19 games |