CChessStats

I Open CRChess-Montes de Oca 2025 - Grupo A

Open SwissStandard

22 players participated in this 7-round tournament, held from 13 Dec 2025 to 15 Dec 2025 in Montes de Oca, Costa Rica. 11 titled players. Top 10 Elo average was 2056, and top seed was Alexis Murillo Tsijli (🇨🇷 CRC, IM, 2259).

Alexis Murillo Tsijli (🇨🇷 CRC, IM, 2259) won with 6.0/7, ahead of Rodrigo Avendano Porras (5.5) and Mauricio Arias Santana (4.5). Murillo Tsijli won solo starting round 4.

The biggest upset came in round 3: Randall Mata Tencio (1927) beat Jonathan Carvajal Gorgona (FM, 2152), a +225-point gap.

Location
🇨🇷Montes de Oca, Costa Rica
Dates
13 Dec 2025 → 15 Dec 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Top seed
🇨🇷IMAlexis Murillo Tsijli2259
Avg top 10
2,056
Participants
22
Titled players · 11
IM×2
FM×2
CM×3
WIM×1
WCM×3
Federations · 1 represented
🇨🇷Costa Rica×22
Top 3

How it unfolded

Top 6 · 7 rounds

IM Alexis Murillo Tsijli led from R4; +0.5-point edge over the runner-up.

Co-leaders
7
3
3
1
1
1
1
23.55.57R1R2R3R4R5R6R7
Murillo Tsijli6Avendano Porras5.5Mata Tencio4.5Arias Santana4.5Jimenez Molina4.5Cossio Carvajal4
R4–R7 · LEAD HELD

IM Alexis Murillo Tsijli held the sole lead from R4 through R7 without losing it.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

IM Alexis Murillo Tsijli beat CM Rodrigo Avendano Porras (Black).

R5–R7 · WIN STREAK

CM Rodrigo Avendano Porras won 3 in a row (R5–R7).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1IMAlexis Murillo Tsijli*
1
1
½
2CMRodrigo Avendano Porras
0
*—
1
3Randall Mata Tencio
0
—*
0
4IMMauricio Arias Santana
½
0
1
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Murillo Tsijli, AlexisIM2259CRC+13B+19N=3B+2N+5B=4N+6B6.026.027.022.502313+3.6
2Avendano Porras, RodrigoCM1973CRC+20N+8B=6N−1B+15N+11N+3B5.524.025.017.002215+42.2
3Arias Santana, MauricioIM2173CRC+15N+5B=1N=4B+16N=6B−2N4.527.530.017.252101-10.4
4Jimenez Molina, Juan LeonFM2007CRC=11N+18B=8N=3N+17B=1B=7N4.523.525.515.002067+13.6
5Mata Tencio, Randall1927CRC+21B−3N+22N+11B−1N=8B+10B4.521.522.09.752106+32.8
6Cossio Carvajal, Bruno2012CRC=9B+16N=2B=17N+7B=3N−1N4.026.028.514.502051+14.8
7Carvajal Pena, Daniel1924CRC=18N−11B+9N+8B−6N+16B=4B4.021.023.012.751953+6.6
8Chaves Sanchez, Gabriel ACM2059CRC+10B−2N=4B−7N+13B=5N=12B3.525.028.012.501947-21.2
9Canales Chinchilla, VictoriaWCM1883CRC=6N−12B−7B+18N+14B−10N+21B3.519.520.58.001845-6.4
10Munoz Garcia, Flavio Estuardo1903CRC−8N=20B+18N−16B+19N+9B−5N3.517.018.07.001876-4.2
11Ulloa Jimenez, Santiago1801CRC=4B+7N=14B−5N+12N−2BF3.024.524.510.751929+20.2
12Diaz Charpentier, Kristel MelissWIM1975CRC−14B+9N−17B+19N−11B=13N=8N3.018.519.57.751855-23.2
13Campos Munoz, ValentinaWCM1917CRC−1N−17B=21N+20B−8N=12B+18N3.018.019.05.001835-32.0
14Ortega Canisales, Aaden Josue1768CRC+12N=22B=11N−15B−9N=18B=16N3.017.017.57.001847+24.4
15Quesada Leon, Joshua1908CRC−3B+21N+19B+14N−2BFF3.015.015.05.001994+11.6
16Aguero Espinoza, Sebasthian1908CRCF−6B+20N+10N−3B−7N=14B2.520.020.06.001854-10.0
17Fallas Saborio, Alejandro1887CRC−19B+13N+12N=6B−4NFF2.515.515.58.001986+13.4
18Valverde Vega, Santiago1651CRC=7B−4N−10B−9B+20N=14N−13B2.021.522.54.501712+14.0
19Espitia Torres, MateoCM2018CRC+17N−1B−15N−12B−10BFF1.018.018.02.501747-35.0
20Gomez Rodriguez, Santiago Alejandro1686CRC−2B=10N−16B−13N−18B=21BF1.017.517.52.251566-34.8
21Mayorga Araya, LarissaWCM1669CRC−5N−15B=13BFF=20N−9N1.015.015.02.001624-13.2
22Carvajal Gorgona, JonathanFM2152CRCF=14N−5BFFFF0.57.57.51.501655-23.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets