USCF player statistics
Rostro, Isaiah Santiago
Official US Chess record- US Chess reported rank
- #17,529 national · #1,517 in state
- Floor
- Regular 150 · Quick 150 · Online Regular 100
- Rated games
- Online Regular 12
US Chess record as of Sep 15, 2026
Regular rating
Published rating · Sep 2026 · 10 published updates since Dec 2025
Other formats against Regular
-9 Quick vs Regular
No national baseline for this rating band yet.
+17 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
- +72
- Jan 2026 to Feb 2026
- Biggest drop
- -60
- Feb 2026 to Mar 2026
- Longest rise
- 2 updates
- +100 from Dec 2025 to Feb 2026
- Current run
- 4 updates
- Unchanged since May 2026
- Typical move
- ±23
- Mean absolute change; spread ±35.4
Regular rating in context
United States
#23,238of 83,635 rated members · higher than 72.1%
60,363 lower · 35 same rating · 23,237 higher · ties share a rank
Texas
#1,852of 10,810 rated members · higher than 82.8%
8,953 lower · 6 same rating · 1,851 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 6,945 within 100 points of 1,322 (this player included)
1,300–1,349: 1,775 members (2.1%) · highlighted band is the player’s · dashed line is the target
73.2% below 1,350 (61,297 of 83,635; 72.1% below 1,322)
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 | Online Regular |
|---|---|---|---|
| Sep 2026 | 1,322no change | 1,313no change | 1,339 Pno change · 12 games |
| Aug 2026 | 1,322no change | 1,313no change | 1,339 P-1 · 12 games |
| Jul 2026 | 1,322no change | 1,313no change | 1,340 P+1 · 12 games |
| Jun 2026 | 1,322no change | 1,313no change | 1,339 P12 games |
| May 2026 | 1,322+31 | 1,313no change | — |
| Apr 2026 | 1,291+20 | 1,313+14 | — |
| Mar 2026 | 1,271-60 | 1,299-61 | — |
| Feb 2026 | 1,331+72 | 1,360+74 | — |
| Jan 2026 | 1,259+28 | 1,286+25 | — |
| Dec 2025 | 1,231 | 1,261 | — |