CChessStats

IRT "Navidad ANBA" 2025

Open SwissStandard

11 players participated in this 7-round tournament, held from 26 Dec 2025 to 28 Dec 2025 in El Alto, Bolivia. 2 titled players. Top 10 Elo average was 1332, and top seed was Paulo Rozo (🇧🇴 BOL, FM, 2139).

Maria Eugenia Ramirez (🇧🇴 BOL, WFM, 1933) won with 6.5/7, ahead of Paulo Rozo (5.5) and John Osman Churata Huacani (5.0). Ramirez won solo starting round 4.

The biggest upset came in round 2: Briseyda Belen Quispe Mamani (1425) beat Nayra Chambi Alcazar (1534), a +109-point gap.

Location
🇧🇴El Alto, Bolivia
Dates
26 Dec 2025 → 28 Dec 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Top seed
🇧🇴FMPaulo Rozo2139
Avg top 10
1,332
Participants
11
Titled players · 2
FM×1
WFM×1
Federations · 1 represented
🇧🇴Bolivia×10
Top 3

How it unfolded

Top 6 · 7 rounds

WFM Maria Eugenia Ramirez led from R4; +1.0-point edge over the runner-up.

Co-leaders
5
3
2
1
1
1
1
23.55.57R1R2R3R4R5R6R7
Ramirez6.5Rozo5.5Churata Huacani5Quispe Mamani3Chavez Mollinedo3Rodriguez Quelca2.5
R4–R7 · LEAD HELD

WFM Maria Eugenia Ramirez never relinquished the lead after R4; final gap +1.0 over the runner-up.

R3 · HEAD-TO-HEAD · WINNER VS 2ND

WFM Maria Eugenia Ramirez drew with FM Paulo Rozo (Black).

WIN STREAKS · 3 top finishers

WFM Maria Eugenia Ramirez 4 wins (R4–R7)FM Paulo Rozo 3 wins (R5–R7)John Osman Churata Huacani 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1WFMMaria Eugenia Ramirez*
½
1
1
2FMPaulo Rozo
½
*
1
1
3John Osman Churata Huacani
0
0
*—
4Briseyda Belen Quispe Mamani
0
0
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΔ
1Ramirez, Maria EugeniaWFM1933BOL+8N+9B=2N+3B+4N+5B+10N6.519.019.016.252025+12.0
2Rozo, PauloFM2139BOL+3B+4N=1BF+5N+8B+6N5.522.023.518.252144+1.2
3Churata Huacani, John Osman1525BOL−2N+8B+10B−1N+9N+6B+4N5.020.020.08.001709+30.0
4Chavez Mollinedo, Christopher1557BOL+10N−2BF+11N−1B+9N−3B3.020.020.01.001545-10.4
5Quispe Mamani, Briseyda Belen1425BOL−7N+11B+9N+6B−2B−1NF3.017.517.53.501549+15.6
6Rodriguez Quelca, Sebastian0BOL+11N−7B=8N−5N+10B−3N−2B2.517.017.00.7514460.0
7Veizaga Mamani, Kirsten Ivana1780BOL+5B+6NFFFFF2.014.014.05.502225+4.0
8Quispe Mamani, Mikeyla Paola1426BOL−1B−3N=6BFF−2N+9B1.520.520.52.25926-20.8
9Sossa Ojeda, Benjamin Tadeo0BOLF−1N−5B+10N−3B−4B−8N1.019.019.00.007740.0
10FIDE 33417200—−4BF−3N−9B−6NF−1B0.018.018.00.008720.0
11Chambi Alcazar, Nayra1534BOL−6B−5NF−4BFFF0.010.010.00.00692-22.4

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets