CChessStats

Abierto de Invierno Comodoro

Open SwissStandard

16 players participated in this 5-round tournament, held from 08 Aug 2025 to 10 Aug 2025 in Comodoro Rivadavia - Chubut, Argentina. Top 10 Elo average was 1405, and top seed was Adrian Hernan Muruchi Machaca (🇦🇷 ARG, 1876).

Sergio Alonso (🇦🇷 ARG, 1754) won with 4.5/5, ahead of Marcelo Anacaya (3.5) and Fernando Garcia (3.5). Alonso broke clear in the final round.

The biggest upset came in round 4: Ricardo Musumeci (1719) beat Adrian Hernan Muruchi Machaca (1876), a +157-point gap.

Location
🇦🇷Comodoro Rivadavia - Chubut, Argentina
Dates
08 Aug 2025 → 10 Aug 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 5 rounds
Top seed
Avg top 10
1,405
Participants
16
Federations · 1 represented
🇦🇷Argentina×11
Top 3

How it unfolded

Top 6 · 5 rounds

Sergio Alonso led from R5; +1.0-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders
6
3
2
2
1
1.52.545R1R2R3R4R5
R5–R5 · LEAD HELD

Sergio Alonso never relinquished the lead after R5; final gap +1.0 over the runner-up.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Sergio Alonso drew with Fernando Garcia (White).

WIN STREAKS · 2 top finishers

Sergio Alonso 3 wins (R1–R3)Fernando Garcia 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Sergio Alonso*
½
1
2Fernando Garcia
½
*
0
3Marcelo Anacaya
0
*
1
4Ricardo Pettinari
1
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Alonso, Sergio1754ARG+14N+6B+2N=3B+10N4.511.011.09.252002+18.0
2Anacaya, Marcelo1809ARG+12B+4N1B=5N+7B3.513.514.58.251843+3.4
3Garcia, Fernando1738ARG+13B+5N+7B=1N4B3.513.514.08.251843+11.0
4Pettinari, Ricardo1680ARG+15N2B+11N=6B+3N3.510.510.55.751729+7.6
5Quinteros, Omar1837ARG+16N3B+8N=2B+11B3.510.010.04.751807-2.6
6Bustos, Pedro1639ARG+11B1N+15B=4NF2.59.09.02.751524-5.6
7Musumeci, Ricardo1719ARGF+9B3N+8B2N2.011.011.04.001682-2.8
8Muruchi Machaca, Adrian Hernan1876ARGF+10N5B7N+9B2.09.09.03.50978-50.4
9Zalaya, Ivo0ARG=10B7N=13N+14B8N2.06.06.01.009970.0
10FIDE 1229980=9N8B+12NF1B1.59.59.52.0010150.0
11FIDE 2006784406N+14B4BF5N1.09.59.50.009190.0
12Marquina, Osmar0ARG2NF10BF+14N1.05.55.50.0010090.0
13FIDE 2006783603NF=9BFF0.56.56.51.009380.0
14FIDE 2000863501B11NF9N12B0.08.58.50.009540.0
15Velardez, Felipe0ARG4BF6NFF0.07.07.00.008600.0
16FIDE 19509005BFFFF0.05.55.50.0010370.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets