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Sergio Guillermo Guillen Murillo

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CRC · 74 yrs · K=20 · Peak 1825 (Mar 2024, includes FIDE’s rating adjustment)

Best performance: 1966 at Campeonato Nacional Senior 2023 Mayores 65(Best of 2023)

World #=191120Costa Rica #301among all players, November list

Classical rating

1819

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

On FIDE’s list since Nov 2019 · Inactive on FIDE’s list

How live ratings are calculated

Rating History · Classical

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Classical rating unchanged at 1819 over the last 12 months; peak 1825 in March 2024.

Official rating by month

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

ListClassicalRapidBlitz
Nov 20261819, 0, 0 games1781, 0, 0 games1799, 0, 0 games
Oct 20261819, 0, 0 games1781, -2, 6 games1799, 0, 0 games
Sep 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
Aug 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
Jul 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
Jun 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
May 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
Apr 20261819, 0, 0 games1783, -1, 0 games1799, 0, 0 games
Mar 20261819, 0, 0 games1784, +1, 0 games1799, 0, 0 games
Feb 20261819, 0, 0 games1783, 0, 0 games1799, 0, 0 games
Jan 20261819, 0, 0 games1783, -14, 4 games1799, 0, 0 games
Dec 20251819, 0, 0 games1797, 0, 0 games1799, 0, 0 games

Form · Classical

oldest → latest

Unbeaten in the last 4 games (2 wins, 2 draws), since May 5, 2024.

From 112 classical games on record, the latest on Jun 23, 2024.

Classical games since the November list

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

Last playedScore
Campeonato Nacional por Equipos Clasico 2024Apr 28, 2024 – Jun 23, 2024TPR 17533/5

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

Best wins · Classical

From 91 rated classical games against rated opponents, 2019–2024

#OpponentRating
1, Rodolfo Arias Formoso, Feb 2022 · Campeonato Nacional Senior Over 50, 2118
2, WFM Olga Leticia Gamboa Alvarado, Dec 2019 · Torneo Internacional Metropolitano Grupo A 2019, 1978
3, Julio Vargas Sanchez, Feb 2022 · Campeonato Nacional Senior Over 50, 1800

Openings · Classical

From the moves of 12 of 112 classical games on record.

As WhiteOpens 1.e4 in 3 of 5 games.

As BlackMeets 1.e4 with 1...d6.

All openings (1 as White, 1 as Black)
Openings in White gamesGamesScore
Sicilian Defense3100%

2 more games in openings played fewer than 3 times.

Event timeline · Classical

17 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
20244217531753
2023331617111697
2022178½17021702
20193013½17261690

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

Rated near Sergio Guillermo Guillen Murillo · Classical · November list, all players

World

  1. #=191120Marco Adrian Guido Torres1819
  2. #=191120Francois Guidot1819
  3. #=191120Sergio Guillermo Guillen Murillo1819
  4. #=191120Artem Gulam1819
  5. #=191120Huseyn Gulamov1819

Costa Rica

  1. #299Roya Eshraghi1822
  2. #300Luis Adolfo Salazar Orozco1821
  3. #301Sergio Guillermo Guillen Murillo1819
  4. #302Werner Redondo Gomez1816
  5. #303Jorge Mario Alvarez Mora1815

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