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Kacper Bartosiewicz

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POL · 16 yrs · K=40 · Peak 1677 (Jun 2026)

Best performance: 1812 at Turniej Szachowy z Okazji 235. Rocznicy Uchwalenia Konstytucji 3 maja(Best of 2026)

World #=85912 live, down 1586#84,326 publishedPoland #=3242Europe #=46283among active players

Rapid rating

1673

FIDE’s November 2026 list. No rated games since, so the live rating is the same.

On FIDE’s list since Apr 2024

How live ratings are calculated

Rating History · Rapid

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Rapid rating 1625 to 1673 over the last 12 months; peak 1677 in June 2026.

Official rating by month

Each month: the rating, its change from the list before, and the rated games FIDE counted.

ListClassicalRapid
Nov 20261707, 0, 0 games1673, 0, 0 games
Oct 20261707, 0, 0 games1673, 0, 0 games
Sep 20261707, 8 games1673, +4, 7 games
Aug 2026unrated1669, 0, 0 games
Jul 2026unrated1669, -8, 8 games
Jun 2026unrated1677, +50, 8 games
May 2026unrated1627, 0, 0 games
Apr 2026unrated1627, -20, 11 games
Mar 2026unrated1647, +23, 7 games
Feb 2026unrated1624, 0, 0 games
Jan 2026unrated1624, -1, 0 games
Dec 2025unrated1625, 0, 0 games

Form · Rapid

oldest → latest

Longest unbeaten run in 2026: 6 games, May 17.

From 121 rapid games on record, the latest on Aug 8.

Rapid games since the November list

No rated rapid games this rating periodsince the NOV26 list (Nov 1, 2026)

Show gamesLast playedScore
VIII Turniej witominski w szachach szybkich 2026Aug 8TPR 16925½/9

The live rating moves only when new rated games are played. Until then it matches the published rating.

Best wins · Rapid

From 89 rated rapid games against rated opponents, 2022–2026

#OpponentRating
1, Jaroslaw Madej, Jun 2025 · Turniej Szachow Szybkich FIDE z GM Miloszem Szparem, 1963
2, Michal Skolimowski, Mar 2026 · X Turniej Szachowy Pamieci Lukowskich Zolnierzy Wykletych, 1881
3, Wojciech Bolesta, May 2026 · Turniej Szachowy z Okazji 235. Rocznicy Uchwalenia Konstytucji 3 maja, 1803

Event timeline · Rapid

14 events

Events before the current rating period show the performance, not a rating change.

Live events show the rating change; earlier events show the performance rating.

Performance rating by year

YearGamesScoreAvg oppTPR
20264220½17071700
2025281017171615
20234210751075
2022101896—

Games count in the month they were played. Each month and year is one performance rating over all of its rated games.

Rated near Kacper Bartosiewicz · Rapid

World

  1. #=85912Pyotr Loginov1673.0
  2. #=85912Szymon Data1673.0
  3. #=85912Kacper Bartosiewicz1673.0
  4. #=85912Grzegorz Majcher1673.0
  5. #=85912Iakovos Mathioudakis1673.0

Poland

  1. #=3242Slawomir Pajaczkowski1673.0
  2. #=3242Szymon Data1673.0
  3. #=3242Kacper Bartosiewicz1673.0
  4. #=3242Grzegorz Majcher1673.0
  5. #=3242Andrzej Lemanczyk1673.0

Live rating: FIDE’s November list plus every rated game played since. Not affiliated with FIDE.

Kacper Bartosiewicz: Live FIDE Rating 1707