CChessStats

Torneo de segunda categoria - El Mundo del Ajedrez 2025

Open SwissStandard

11 players participated in this 5-round tournament, held from 01 Nov 2025 to 02 Nov 2025 in Comodoro Rivadavia, Chubut, Argentina. Top 10 Elo average was 1526, and top seed was Carlos Moreno (🇦🇷 ARG, 1947).

Adrian Hernan Muruchi Machaca (🇦🇷 ARG, 1871) won with 4.5/5, ahead of Marcelo Anacaya (3.5) and Ricardo Pettinari (3.5). Muruchi Machaca took the lead from round 4.

The biggest upset came in round 1: Osmar Marquina (1458) beat Sergio Alonso (1754), a +296-point gap.

Location
🇦🇷Comodoro Rivadavia, Chubut, Argentina
Dates
01 Nov 2025 → 02 Nov 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Top seed
🇦🇷Carlos Moreno1947
Avg top 10
1,526
Participants
11
Federations · 1 represented
🇦🇷Argentina×9
Top 3

How it unfolded

Top 6 · 5 rounds

Adrian Hernan Muruchi Machaca led from R4; +1.0-point edge over the runner-up.

Co-leaders
5
3
1
1
1
1.52.545R1R2R3R4R5Muruchi Machaca takes lead
R4 · LEADER CHANGE02 Nov

Adrian Hernan Muruchi Machaca takes the sole lead (3.5/4).

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Adrian Hernan Muruchi Machaca beat Ricardo Pettinari (White).

R1–R3 · WIN STREAK

Ricardo Pettinari won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Muruchi Machaca, Adrian Hernan1871ARG+6N+8B=2N+3B+5N4.512.013.011.252068+41.2
2Anacaya, Marcelo1812ARG+7B+9N=1B=4N=3N3.513.513.57.751806-0.2
3Pettinari, Ricardo1688ARG+10B+5B+7N1N=2B3.513.013.06.751885+40.8
4Alonso, Sergio1754ARG8N+6B+10N=2B+9N3.56.56.53.751621-9.6
5Moreno, Carlos1947ARG+11B3N+9B+8N1B3.09.09.01.001679-24.4
6Zalaya, Ivo1594ARG1B4NF+10B+8N2.09.09.01.001569-5.6
7Muruchi Machaca, Sol Angeles1529ARG2N+11N3B+9BF2.07.07.00.001578+6.4
8Marquina, Osmar1458ARG+4B1NF5B6B1.013.013.03.501573+14.8
9FIDE 200678440F2B5N7N4B0.012.012.00.009610.0
10FIDE 2007284803NF4B6NF0.09.09.00.008790.0
11Velardez, Felipe1610ARG5N7BFFF0.06.06.00.00938-29.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets