USCF player statistics
Ambula, Sai Karthik
Official US Chess recordRegular rating
Provisional rating · Sep 2026 · 6 published updates since Apr 2026
Other formats against Regular
-3 Quick vs Regular (provisional)
No national baseline for this rating band yet.
+213 Online Regular vs Regular (provisional)
No national baseline for this rating band yet.
+92 Online Quick vs Regular (provisional)
No national baseline for this rating band yet.
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +27
- Jul 2026 to Aug 2026
- Biggest drop
- -135
- Apr 2026 to May 2026
- Longest rise
- 1 update
- +27 from Jul 2026 to Aug 2026
- Current run
- 1 update
- Unchanged since Aug 2026
- Typical move
- ±50
- Mean absolute change; spread ±69.1
Regular rating in context
United States
#63,638of 83,635 rated members · higher than 23.8%
19,943 lower · 55 same rating · 63,637 higher · ties share a rank
Illinois
#3,237of 4,678 rated members · higher than 30.7%
1,438 lower · 4 same rating · 3,236 higher · ties share a rank
Where this rating sits · United States
83,635 rated members in 50-point bands · median 800–849 · 10,980 within 100 points of 412 (this player included)
400–449: 2,735 members (3.2%) · highlighted band is the player’s · dashed line is the target
26.3% below 450 (22,043 of 83,635; 23.8% below 412)
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 | Online Quick |
|---|---|---|---|---|
| Sep 2026 | 412 Pno change · 21 games | 409 Pno change · 21 games | 625 Pno change · 19 games | 504 Pno change · 13 games |
| Aug 2026 | 412 P+27 · 21 games | 409 P+36 · 21 games | 625 Pno change · 19 games | 504 Pno change · 13 games |
| Jul 2026 | 385 Pno change · 16 games | 373 Pno change · 16 games | 625 Pno change · 19 games | 504 P13 games |
| Jun 2026 | 385 P-89 · 16 games | 373 P-80 · 16 games | 625 Pno change · 19 games | — |
| May 2026 | 474 P-135 · 11 games | 453 P-136 · 11 games | 625 P-3 · 19 games | — |
| Apr 2026 | 609 P7 games | 589 P7 games | 628 P13 games | — |
| Mar 2026 | — | — | — | — |
| Feb 2026 | — | — | — | — |