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Masis Chaves, Sebastian

🇨🇷

FIDEFIDE 6559115· Male· Costa Rica· Born in 2011

Follow Sebastian Masis ChavesTrack his monthly FIDE ratings, games, tournaments and more.

Sebastian Masis Chaves, a 15-year-old player, is rated 1406. He has slipped back 69 Elo over the past 12 months. 20 rated games in the past year (≈19/year long-term). Recent standard appearances include II Torneo Abierto Memorial Luis Araya Araya 2026, Campeonato Nacional Categorias Menores Pares 2026 U16 Absoluto, and Juegos Deportivos Nacionales 2026 Standard U16 Equipo Absoluto. Also played 2 rapid (including Campeonato Nacional Rapid de Categorias Menores Impares U15, 2025) and 1 blitz events recently. His peak of 1475 was reached at age 14 (May 2025).

At junior level, he reached #59 and #40 nationally in U16 and U14.

Current rating

1406

Standard

Rpd1593·Blz1696

All-time high

1475

−69 pts below
May 2025 · age 14

Activity

18

games / yr avg. · ≈2/mo

20 past 12 mo · ≈2/mo
classical only
Moderately active

Signature stat

#215,244

#215,244 · players worldwide · of 216,808

Career timeline

6 entries
2026
59th U16 player nationally
at age 15 · rated 1466
Jan 2026
2025
40th U14 player nationally
at age 14 · rated 1475
May 2025
Crossed 1400
at age 14
May 2025
Crossed 1200
at age 14
May 2025
All-time peak 1475
at age 14 · −69 from today
May 2025
First FIDE rating
1475 · at age 14
May 2025

Standard rating history

Last 12 months — activity & highlights

Best result
Juegos Deportivos Nacionales Eliminatorias 2025 Z2 U16 Equipos Absoluto
perf 1660 (+194) · 2.5/5 · #33
Top opponent
vs Julian Gonzalez Aguero 1,560
Juegos Deportivos Nacionales Eliminatorias 2025 Z2 U16 Equipos Absoluto · Aug 2025 · +5.3 Elo
Evolution
-69
1475 → 1406
Tournaments
4
27 games
Score
10.5/ 2738.9%
9W3D15L

Last 12 months — tournaments

4 events
EventDateScoreRankPerfΔ Elo
II Torneo Abierto Memorial Luis Araya Araya 2026
Open Swiss
Apr 20262.5/6#601566-8.8
Campeonato Nacional Categorias Menores Pares 2026 U16 Absoluto
Open Swiss
Feb 20263/4#381743-62.8
Juegos Deportivos Nacionales 2026 Standard U16 Equipo Absoluto
Team
Jan 20262.5/5#20—+11.2
Juegos Deportivos Nacionales Eliminatorias 2025 Z2 U16 Equipos Absoluto
Team
Aug 20252.5/5#331660-8.4
Worst Elo result: Campeonato Nacional Categorias Menores Pares 2026 U16 Absoluto (-62.8 Elo, finished #38).

Rankings

/
Costa Rica
#561
out of 695 players
Americas
#25,291
in continent
World
#214,732
out of 400,000+

National ranking

Europe & World

Europe
World
Costa Rica
1
🇨🇷Gonzalez Acosta, BernalFollow Bernal Gonzalez AcostaTrack their monthly FIDE ratings, games, tournaments and more.
2,453
2
🇨🇷Mihajlov, SebastianFollow Sebastian MihajlovTrack their monthly FIDE ratings, games, tournaments and more.
2,372
3
🇨🇷Jimenez Garcia, EmmanuelFollow Emmanuel Jimenez GarciaTrack their monthly FIDE ratings, games, tournaments and more.
2,349
4
🇨🇷Minero Pineda, SergioFollow Sergio Minero PinedaTrack their monthly FIDE ratings, games, tournaments and more.
2,330
5
🇨🇷Valdes Romero, LeonardoFollow Leonardo Valdes RomeroTrack their monthly FIDE ratings, games, tournaments and more.
2,326
6
🇨🇷Alfaro Rojas, Alfonso JoseFollow Alfonso Jose Alfaro RojasTrack their monthly FIDE ratings, games, tournaments and more.
2,316
7
🇨🇷Duran Vega, SergioFollow Sergio Duran VegaTrack their monthly FIDE ratings, games, tournaments and more.
2,283
8
🇨🇷Murillo Tsijli, AlexisFollow Alexis Murillo TsijliTrack their monthly FIDE ratings, games, tournaments and more.
2,263
9
🇨🇷Cabezas Solano, David AlejandroFollow David Alejandro Cabezas SolanoTrack their monthly FIDE ratings, games, tournaments and more.
2,252
10
🇨🇷Angulo Perez, SebastianFollow Sebastian Angulo PerezTrack their monthly FIDE ratings, games, tournaments and more.
2,182
...
561🇨🇷Masis Chaves, Sebastian1,406
Americas
1
🇺🇸Nakamura, HikaruFollow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more.
2,792
2
🇺🇸Caruana, FabianoFollow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more.
2,788
3
🇺🇸So, WesleyFollow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more.
2,754
4
🇺🇸Dominguez Perez, LeinierFollow Leinier Dominguez PerezTrack their monthly FIDE ratings, games, tournaments and more.
2,732
5
🇺🇸Niemann, Hans MokeFollow Hans Moke NiemannTrack their monthly FIDE ratings, games, tournaments and more.
2,728
6
🇺🇸Aronian, LevonFollow Levon AronianTrack their monthly FIDE ratings, games, tournaments and more.
2,724
7
🇺🇸Liang, AwonderFollow Awonder LiangTrack their monthly FIDE ratings, games, tournaments and more.
2,718
8
🇺🇸Sevian, SamuelFollow Samuel SevianTrack their monthly FIDE ratings, games, tournaments and more.
2,696
9
🇺🇸Xiong, JefferyFollow Jeffery XiongTrack their monthly FIDE ratings, games, tournaments and more.
2,656
10
🇺🇸Robson, RayFollow Ray RobsonTrack their monthly FIDE ratings, games, tournaments and more.
2,653
...
25291🇨🇷Masis Chaves, Sebastian1,406
World
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,840
2
🇺🇸Nakamura, HikaruFollow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more.
2,792
3
🇺🇸Caruana, FabianoFollow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more.
2,788
4
🇺🇿Abdusattorov, NodirbekFollow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more.
2,780
5
🇺🇿Sindarov, JavokhirFollow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more.
2,776
6
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,767
7
🇩🇪Keymer, VincentFollow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more.
2,759
7
🇫🇷Firouzja, AlirezaFollow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more.
2,759
9
🇺🇸So, WesleyFollow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more.
2,754
10
🇨🇳Wei, YiFollow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more.
2,753
...
214732🇨🇷Masis Chaves, Sebastian1,406