USCF player statistics

Mostovoy, Idan

USCF 16950214IllinoisUpdated: Nov 2026
Official US Chess record

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Gender
Male
FIDE
FIDE 0
US Chess reported rank
#44,864 national · #2,132 in state
Floor
Regular 143 · Quick 150 · Blitz 125 · Online Regular 100
Rated games
Blitz 18 · Online Regular 11

US Chess record as of Sep 15, 2026

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Rating format

Regular rating

5980 since Oct 2026

Published rating · Nov 2026 · 12 published updates since Dec 2025

Nov 2026598 Regular
Dec 2025: 625Jan 2026: 625Feb 2026: 625Mar 2026: 625Apr 2026: 625May 2026: 598Jun 2026: 598Jul 2026: 598Aug 2026: 598Sep 2026: 598Oct 2026: 598Nov 2026: 598
Dec 2025Nov 2026
12 updates in this window · -27 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity
Overlays their published ratings on the chart; the link keeps the comparison.

Other formats against Regular

  • +13 Quick vs Regular

    Typical for 500–599 regular players: -3 (middle half -12 to +8, 2,095 established members). This gap is above the typical range.

  • +44 Blitz vs Regular (provisional)

    Typical for 500–599 regular players: -36 (middle half -135 to +86, 70 established members). This gap is within the typical range.

  • -97 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
—
No gain between published updates yet
Biggest drop
-27
Apr 2026 to May 2026
Longest rise
—
No consecutive gains yet
Current run
6 updates
Unchanged since May 2026
Typical move
±2
Mean absolute change; spread ±8.1

Regular rating in context

Nov 2026 update

United States

#53,581of 83,032 rated members · higher than 35.4%

29,400 lower · 52 same rating · 53,580 higher · ties share a rank

Illinois

#2,562of 4,515 rated members · higher than 43.1%

1,949 lower · 5 same rating · 2,561 higher · ties share a rank

Where this rating sits · United States

83,032 rated members in 50-point bands · median 850–899 · 10,337 within 100 points of 598 (this player included)

Player · 598
01,4252,850

550–599: 2,600 members (3.1%) · highlighted band is the player’s · dashed line is the target

35.5% below 600 (29,497 of 83,032; 35.4% below 598)

Percentile over time · United States

35.4% higher than · Nov 2026 · rank #53,581 of 83,032

Since Dec 2025
-2.2 pts

Dec 2025: higher than 37.6% (rank 50,544 of 81,102)Jan 2026: higher than 37% (rank 49,965 of 79,487)Feb 2026: higher than 37.3% (rank 52,559 of 83,940)Mar 2026: higher than 36.9% (rank 50,738 of 80,605)Apr 2026: higher than 37.2% (rank 50,664 of 80,831)May 2026: higher than 35.4% (rank 52,377 of 81,236)Jun 2026: higher than 36% (rank 53,242 of 83,290)Jul 2026: higher than 36.2% (rank 52,697 of 82,736)Aug 2026: higher than 36.1% (rank 53,014 of 83,080)Sep 2026: higher than 35.9% (rank 53,491 of 83,635)Oct 2026: higher than 35.5% (rank 53,182 of 82,596)Nov 2026: higher than 35.4% (rank 53,581 of 83,032)
Dec 2025Nov 2026
Each month against that month’s active pool, so pool growth and rating drift both count.
How these comparisons are calculated

Chess67 calculations from the Nov 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.

United States statistics Illinois statistics

Published ratings by month

P marks a provisional rating; the small figure is the change since the previous published observation.

Monthly USCF ratings for Mostovoy, Idan
MonthRegularQuickBlitzOnline Regular
Nov 2026598no change611no change642 Pno change · 18 games501 Pno change · 11 games
Oct 2026598no change611no change642 Pno change · 18 games501 Pno change · 11 games
Sep 2026598no change611no change642 P+1 · 18 games501 Pno change · 11 games
Aug 2026598no change611no change641 Pno change · 18 games501 Pno change · 11 games
Jul 2026598no change611no change641 Pno change · 18 games501 Pno change · 11 games
Jun 2026598no change611no change641 Pno change · 18 games501 Pno change · 11 games
May 2026598-27611no change641 Pno change · 18 games501 Pno change · 11 games
Apr 2026625no change611no change641 Pno change · 18 games501 Pno change · 11 games
Mar 2026625no change611no change641 Pno change · 18 games501 Pno change · 11 games
Feb 2026625no change611-1641 Pno change · 18 games501 Pno change · 11 games
Jan 2026625no change612no change641 Pno change · 18 games501 Pno change · 11 games
Dec 2025625612641 P18 games501 P11 games
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About these statistics. Built from the monthly USCF rating updates available to Chess67. Ratings change between publications, and a missing month is not inactivity. The official US Chess record has current ratings and tournament history.