IV Irt Semana Santa Santa Sub 2400, Valdivia 2026

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19 players participated in this 5-round tournament, held from 28 Mar 2026 to 29 Mar 2026 in Valdivia, Chile. Top 10 Elo average was 1707, and top seed was Arturo Nicolas Araneda Alcaino (🇨🇱 CHI, 1852).

Alison Herrera Catrilef (🇨🇱 CHI, 1764) won with 4.0/5, ahead of Arturo Nicolas Araneda Alcaino (4.0) and Emilio Alon Larranaga Arriagada (4.0). Herrera Catrilef shared the lead from round 1, winning on tie-break.

Location

🇨🇱Valdivia, Chile

Dates

28 Mar 2026 → 29 Mar 2026

Time control

Standard: 60 minutes with 30 seconds increment from move 1

System

Swiss · 5 rounds

Top seed

🇨🇱Arturo Nicolas Araneda Alcaino1852

Avg top 10

1,707

Participants

Federations · 1 represented

🇨🇱Chile×19

Top 3

🥇
Alison Herrera Catrilef
🇨🇱CHI·1764
4.0pts·1936perf+44.0
🥈
Arturo Nicolas Araneda Alcaino
🇨🇱CHI·1852
4.0pts·1937perf+19.2
🥉
Emilio Alon Larranaga Arriagada
🇨🇱CHI·1688
4.0pts·1866perf+38.0

How it unfolded

Top 6 · 5 rounds

Tight race until R4; 3 players tied at 4.0/5, decided on Buchholz.

Co-leaders

Herrera Catrilef4Araneda Alcaino4Larranaga Arriagada4Alvarado Lillo3.5Iturra Gutierrez3.5Moreira Roldan3

R4–R5 · LEAD HELD

Alison Herrera Catrilef held the sole lead from R4 through R5 without losing it.

R5 · TIEBREAK CLUSTER

3 players finish on 4.0/5. Herrera Catrilef takes the title on Buchholz Cut1 (14.5).

R3 · HEAD-TO-HEAD · WINNER VS 2ND

Alison Herrera Catrilef beat Arturo Nicolas Araneda Alcaino (White).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Alison Herrera Catrilef	*	1	0	—
2Arturo Nicolas Araneda Alcaino	0	*	—	1
3Emilio Alon Larranaga Arriagada	1	—	*	—
4Sebastian Eduardo Alvarado Lillo	—	0	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	Pts	Bu C1	Bu	SB	Perf	Δ
1	Herrera Catrilef, Alison	1764	CHI	+10N	+4B	+2B	+6N	−3B	4.0	14.5	17.0	13.00	1936	+44.0
2	Araneda Alcaino, Arturo Nicolas	1852	CHI	+9N	+8B	−1N	+5N	+6B	4.0	13.5	16.0	12.00	1937	+19.2
3	Larranaga Arriagada, Emilio Alon	1688	CHI	+17N	+18B	−6N	+14B	+1N	4.0	8.5	8.5	5.50	1866	+38.0
4	Iturra Gutierrez, Maria Ignacia	1665	CHI	+16B	−1N	+11B	+12N	=7B	3.5	11.0	12.0	6.50	1688	+5.6
5	Alvarado Lillo, Sebastian Eduardo	1635	CHI	+19N	=14B	+8N	−2B	+9N	3.5	11.0	11.0	6.25	1808	+36.4
6	Contreras Herrera, Sebastian Andres	1784	CHI	+13B	+7N	+3B	−1B	−2N	3.0	15.0	17.0	9.00	1775	-0.4
7	Moreira Roldan, Leonardo	1682	CHI	+11N	−6B	+14N	=9B	=4N	3.0	11.0	12.5	6.50	1710	+10.0
8	Ruiz Symmes, Arturo	1684	CHI	+15B	−2N	−5B	+16N	+12B	3.0	11.0	12.0	4.50	1606	-8.0
9	Toro Medina, Mathias Alexander	1622	CHI	−2B	+15N	+16B	=7N	−5B	2.5	12.0	13.0	4.00	1563	-7.2
10	Tobar Sala, Juan Carlos	1491	CHI	−1B	−11N	=15B	+17N	+16B	2.5	8.5	8.5	1.75	1432	-7.8
11	Arredondo Rubilar, Alonso Joaquin	1425	CHI	−7B	+10B	−4N	+18N	−13B	2.0	11.0	11.0	2.50	1400	-6.4
12	Caceres Monroy, Josefa Hanan	1484	CHI	−14N	+19B	+18N	−4B	−8N	2.0	8.0	8.0	0.00	881	-32.0
13	Pizarro Rozas, Aaron	1541	CHI	−6N	F	+17B	F	+11N	2.0	5.0	5.0	2.00	1681	+22.8
14	Merino Barria, Diego Tomas	1695	CHI	+12B	=5N	−7B	−3N	F	1.5	12.5	12.5	3.75	1540	-17.2
15	Luhrs Obando, OttoFernando	1431	CHI	−8N	−9B	=10N	F	+18B	1.5	8.0	8.0	1.25	1326	-14.4
16	Herrera Catrilef, Pia Agustina	0	CHI	−4N	+17B	−9N	−8B	−10N	1.0	11.5	11.5	0.00	1344	0.0
17	Gongora Rauch, Agustin Maximiliano	1457	CHI	−3B	−16N	−13N	−10B	F	0.0	9.5	9.5	0.00	771	-42.4
18	Herrera Catrilef, Camila Leonor	0	CHI	F	−3N	−12B	−11B	−15N	0.0	9.5	9.5	0.00	713	0.0
19	Neguiman Osses, Agustina Ignacia	0	CHI	−5B	−12N	F	F	F	0.0	7.5	7.5	0.00	770	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Herrera Catrilef, AlisonCHI
+44.0
4.0 pts · #1
2Larranaga Arriagada, Emilio AlonCHI
+38.0
4.0 pts · #5
3Alvarado Lillo, Sebastian EduardoCHI
+36.4
3.5 pts · #6

Top rating losers

1Gongora Rauch, Agustin MaximilianoCHI
-42.4
0.0 pts · #16
2Caceres Monroy, Josefa HananCHI
-32.0
2.0 pts · #17
3Merino Barria, Diego TomasCHI
-17.2
1.5 pts · #12