USCF player statistics
Ziemba, Radoslaw
- Gender
- Male
- US Chess reported rank
- #17,368 national · #173 in state
- Floor
- Regular 150 · Quick 150
US Chess record as of Sep 17, 2026
How this rating moves
Between consecutive published observations, provisional included.
- Biggest gain
- +264
- Dec 2025 to Jan 2026
- Biggest drop
- —
- No drop between published updates yet
- Longest rise
- 5 updates
- +501 from Dec 2025 to May 2026
- Updates that moved
- 8 of 10
- Latest +54, Sep 2026 to Oct 2026
- Typical move
- ±67
- Mean absolute change; spread ±86.3
Regular rating in context
United States
#21,315of 82,596 rated members · higher than 74.1%
61,236 lower · 46 same rating · 21,314 higher · ties share a rank
Louisiana
#215of 682 rated members · higher than 68.3%
466 lower · 2 same rating · 214 higher · ties share a rank
Where this rating sits · United States
82,596 rated members in 50-point bands · median 800–849 · 6,851 within 100 points of 1,383 (this player included)
1,350–1,399: 1,632 members (1.9%) · highlighted band is the player’s · dashed line is the target
74.8% below 1,400 (61,824 of 82,596; 74.1% below 1,383)
Percentile over time · United States
74.1% higher than · Oct 2026 · rank #21,315 of 82,596
Since Dec 2025
+31.2 pts
How these comparisons are calculated
Chess67 calculations from the Oct 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 |
|---|---|---|
| Oct 2026 | 1,383+54 | 1,252no change |
| Sep 2026 | 1,329+1 | 1,252+16 |
| Aug 2026 | 1,328+114 | 1,236+133 |
| Jul 2026 | 1,214no change | 1,103no change |
| Jun 2026 | 1,214no change | 1,103no change |
| May 2026 | 1,214+69 | 1,103no change |
| Apr 2026 | 1,145+13 | 1,103+10 |
| Mar 2026 | 1,132 P+146 · 24 games | 1,093 P+129 · 24 games |
| Feb 2026 | 986 P+9 · 24 games | 964 P+14 · 24 games |
| Jan 2026 | 977 P+264 · 16 games | 950 P+264 · 16 games |
| Dec 2025 | 713 P16 games | 686 P16 games |