Ajedrez San Miguel - IRT Abierto de Otono

Open SwissStandard

19 players participated in this 6-round tournament, held from 30 Apr 2026 to 03 May 2026 in San Miguel - Buenos Aires, Argentina. Top 10 Elo average was 1768, and top seed was Tomas Arce (🇦🇷 ARG, 1977).

Tomas Arce (🇦🇷 ARG, 1977) won with 4.5/6, ahead of Juan Ignacio Peredo (4.5) and Marcelo Raul Perez (3.5). Arce took the lead from round 5, winning on tie-break.

The biggest upset came in round 1: Lisandro Lugo (1535) beat Adrian Horacio Fenili (1816), a +281-point gap.

Location

🇦🇷San Miguel - Buenos Aires, Argentina

Dates

30 Apr 2026 → 03 May 2026

Time control

Standard: 60 minutes with 30 seconds increment from move 1

System

Swiss · 6 rounds

Top seed

🇦🇷Tomas Arce1977

Avg top 10

1,768

Participants

Federations · 1 represented

🇦🇷Argentina×17

Top 3

🥇
Tomas Arce
🇦🇷ARG·1977
4.5pts·1900perf-16.8
🥈
Juan Ignacio Peredo
🇦🇷ARG·1742
4.5pts·1896perf+20.0
🥉
Marcelo Raul Perez
🇦🇷ARG·1773
3.5pts·1818perf+3.4

How it unfolded

Top 6 · 6 rounds

Tight race until R5; 2 players tied at 4.5/6, decided on Buchholz.

Co-leaders

Arce4.5Peredo4.5Prado3.53.5Perez3.5Villar Gauto3

R5 · LEADER CHANGE03 May

Tomas Arce takes the sole lead (4.0/5).

R6 · TIEBREAK CLUSTER

2 players finish on 4.5/6. Arce takes the title on Buchholz Cut1 (16.5).

R5 · HEAD-TO-HEAD · WINNER VS 2ND

Tomas Arce beat Juan Ignacio Peredo (White).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Tomas Arce	*	1	—	—
2Juan Ignacio Peredo	0	*	—	—
3Ariel Tomas Prado	—	—	*	1
4FIDE 20080999	—	—	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Arce, Tomas	1977	ARG	+7N	+9B	=3N	=6B	+2B	=10N	4.5	16.5	19.0	14.50	1900	-16.8
2	Peredo, Juan Ignacio	1742	ARG	+15N	=14B	+10N	+3B	−1N	+6B	4.5	15.0	16.5	11.25	1896	+20.0
3	Perez, Marcelo Raul	1773	ARG	+19B	+5N	=1B	−2N	F	+9N	3.5	16.5	17.0	8.75	1818	+3.4
4	Prado, Ariel Tomas	1912	ARG	=12B	−6N	+5B	−8N	+13B	+14N	3.5	14.0	15.5	8.25	1664	-58.0
5	FIDE 20080999	0	—	+11N	−3B	−4N	=15B	+18N	+7B	3.5	14.0	15.0	7.25	1712	0.0
6	Villar Gauto, Silvio Mariano	1688	ARG	F	+4B	+14N	=1N	=9B	−2N	3.0	16.5	16.5	8.50	1860	+44.4
7	Armella, Facundo Ezequiel	1556	ARG	−1B	−16N	+18N	+19B	+14B	−5N	3.0	12.0	12.5	3.00	1764	+17.6
8	Fenili, Adrian Horacio	1816	ARG	−14N	+15B	F	+4B	−10N	+11B	3.0	11.5	11.5	7.50	1704	-22.4
9	Gambini, Juan Carlos	1736	ARG	+16B	−1N	+13B	F	=6N	−3B	2.5	15.5	17.0	5.00	1699	-5.2
10	Nievas, Daniel Mario	1726	ARG	+18N	F	−2B	F	+8B	=1B	2.5	13.0	13.0	6.25	1845	+9.0
11	Alvarez, Maximiiano	1606	ARG	−5B	=12N	+19B	−13N	+16B	−8N	2.5	12.5	13.0	3.25	1414	-27.2
12	Hupchak, Juan Pablo	1539	ARG	=4N	=11B	F	F	=15N	+19N	2.5	10.5	10.5	4.25	1759	+19.6
13	Garcia, Manuel Nicolas	1707	ARG	F	=17B	−9N	+11B	−4N	=15B	2.0	11.5	11.5	4.00	1624	-20.0
14	Lugo, Lisandro	1535	ARG	+8B	=2N	−6B	F	−7N	−4B	1.5	17.0	17.0	5.25	1594	+2.0
15	FIDE 20077858	0	—	−2B	−8N	F	=5N	=12B	=13N	1.5	15.5	15.5	4.00	1508	0.0
16	Farinon, Elias Javier	0	ARG	−9N	+7B	−17N	=18B	−11N	F	1.5	10.5	10.5	3.50	1429	0.0
17	Gigena, Federico	1589	ARG	F	=13N	+16B	F	F	F	1.5	7.0	7.0	2.50	1707	+6.4
18	Garcia Della Vecchia, Agustin	0	ARG	−10B	=19N	−7B	=16N	−5B	F	1.0	11.0	11.0	1.00	841	0.0
19	Chao, Dylan Nicolas	0	ARG	−3N	=18B	−11N	−7N	F	−12B	0.5	12.5	12.5	0.50	819	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Villar Gauto, Silvio MarianoARG
+44.4
3.0 pts · #3
2Peredo, Juan IgnacioARG
+20.0
4.5 pts · #2
3Hupchak, Juan PabloARG
+19.6
2.5 pts · #14

Top rating losers

1Prado, Ariel TomasARG
-58.0
3.5 pts · #4
2Alvarez, MaximiianoARG
-27.2
2.5 pts · #17
3Fenili, Adrian HoracioARG
-22.4
3.0 pts · #6

Biggest upsets

R1+281 Elo gap
Lugo, Lisandro1535 beat Fenili, Adrian Horacio1816
R2+224 Elo gap
Villar Gauto, Silvio Mariano1688 beat Prado, Ariel Tomas1912