CChessStats

Olimpiada Nacional 2026. Region IV. Sub 20 Fem

Open SwissStandard

11 players participated in this 5-round tournament, held from 18 Mar 2026 to 20 Mar 2026 in MOR, Cuernavaca, Mexico. 2 titled players. Top 10 Elo average was 1690, and top seed was Vanya Briseyda Conde Mares (🇲🇽 MEX, WCM, 1922).

Mariel Villalva Cedano (🇲🇽 MEX, 1673) won with 4.0/5, ahead of Natalia Belen Garcia Ortega (3.5) and Shirel Diaz Gonzalez Jardon (3.0). Villalva Cedano won solo starting round 2.

The biggest upset came in round 1: Mariel Villalva Cedano (1673) beat Vanya Briseyda Conde Mares (WCM, 1922), a +249-point gap.

Location
🇲🇽MOR, Cuernavaca, Mexico
Dates
18 Mar 2026 → 20 Mar 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 5 rounds
Top seed
🇲🇽WCMVanya Briseyda Conde Mares1922
Avg top 10
1,690
Participants
11
Titled players · 2
WCM×2
Federations · 1 represented
🇲🇽Mexico×10
Top 3

How it unfolded

Top 6 · 5 rounds

Mariel Villalva Cedano led from R2; +0.5-point edge over the runner-up.

Co-leaders
3
1
1
1
1
1.52.545R1R2R3R4R5
Villalva Cedano4Garcia Ortega3.5Conde Mares3Diaz Gonzalez Jardon3Lopez Flores3Vazquez Zarate2
R2–R5 · LEAD HELD

Mariel Villalva Cedano held the sole lead from R2 through R5 without losing it.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Mariel Villalva Cedano drew with WCM Natalia Belen Garcia Ortega (Black).

R1–R3 · WIN STREAK

Mariel Villalva Cedano won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Mariel Villalva Cedano*
½
1
½
2WCMNatalia Belen Garcia Ortega
½
*
1
½
3WCMVanya Briseyda Conde Mares
0
0
*—
4Shirel Diaz Gonzalez Jardon
½
½
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Villalva Cedano, Mariel1673MEX+4B+7N+6B=2N=3B4.011.513.510.251993+40.2
2Garcia Ortega, Natalia BelenWCM1852MEX=3B+11N+4B=1B=6N3.512.012.58.001833+0.2
3Diaz Gonzalez Jardon, Shirel1748MEX=2N+9B−5N+10B=1N3.012.012.55.751714-3.6
4Conde Mares, Vanya BriseydaWCM1922MEX−1N+8B−2N+11B+9B3.011.011.54.001736-20.2
5Lopez Flores, Mariant Geraldine1660MEX+10B−6N+3B−9N+7B3.08.59.05.501666+1.0
6Vazquez Zarate, Andrea Ximena1492MEXF+5B−1N=7N=2B2.012.512.55.751734+47.2
7Luna Lara, Karen Vanesa1752MEX+8N−1B=10N=6B−5N2.011.011.53.251504-26.6
8Acosta Santos, Karoll Gabriela1538MEX−7B−4N+11BF+10N2.06.06.01.001628+10.0
9Montiel Gonzalez, Yotzzabel1673MEX=11B−3NF+5B−4N1.59.59.53.251641-4.6
10FIDE 296637250—−5NF=7B−3N−8B0.510.010.01.0013520.0
11Bahena Tello, Tania Quetzalli1587MEX=9N−2B−8N−4NF0.510.010.00.751424-15.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets