USCF player statistics
Siam Arias, Juan Isidro
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-90 Quick vs Regular (provisional)
No national baseline for this rating band yet.
-99 Blitz vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +4
- Mar 2026 to Apr 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 1 update
- +4 from Mar 2026 to Apr 2026
- Current run
- 5 updates
- Unchanged since Apr 2026
- Typical move
- ±0
- Mean absolute change; spread ±1.3
Regular rating in context
United States
96.8%of the comparison population has a lower rating.
81,000 lower · 11 same rating · 2,624 higher
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 2,841 within 100 points of 2,030
2,000–2,049: 872 members (1%) · highlighted band is the player’s · dashed line is the target
97.1% below 2,050 (81,258 of 83,635; 96.8% below 2,030)
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 | Blitz |
|---|---|---|---|
| Sep 2026 | 2,030 Pno change · 7 games | 1,940 Pno change · 7 games | 1,931 Pno change · 16 games |
| Aug 2026 | 2,030 Pno change · 7 games | 1,940 P-1 · 7 games | 1,931 Pno change · 16 games |
| Jul 2026 | 2,030 Pno change · 7 games | 1,941 Pno change · 7 games | 1,931 Pno change · 16 games |
| Jun 2026 | 2,030 Pno change · 7 games | 1,941 Pno change · 7 games | 1,931 Pno change · 16 games |
| May 2026 | 2,030 Pno change · 7 games | 1,941 Pno change · 7 games | 1,931 Pno change · 16 games |
| Apr 2026 | 2,030 P+4 · 7 games | 1,941 P+10 · 7 games | 1,931 P+5 · 16 games |
| Mar 2026 | 2,026 Pno change · 7 games | 1,931 Pno change · 7 games | 1,926 Pno change · 16 games |
| Feb 2026 | 2,026 Pno change · 7 games | 1,931 Pno change · 7 games | 1,926 Pno change · 16 games |
| Jan 2026 | 2,026 Pno change · 7 games | 1,931 Pno change · 7 games | 1,926 Pno change · 16 games |
| Dec 2025 | 2,026 P7 games | 1,931 P7 games | 1,926 P16 games |