Clasificatorio al Sudamericano 2025, Sub-10 Absoluto

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21 players participated in this 7-round tournament, held from 26 Sept 2025 to 28 Sept 2025 in Potosi, Bolivia. Top 10 Elo average was 1186, and top seed was Jose Damir Ruiz Achacollo (🇧🇴 BOL, 1594).

Jose Damir Ruiz Achacollo (🇧🇴 BOL, 1594) won with 6.0/7, ahead of Thiago Valentin Avila Calani (5.5) and Matteo Ono Espinoza (5.0). Ruiz Achacollo shared the lead from round 4 and won solo starting round 6.

Location

🇧🇴Potosi, Bolivia

Dates

26 Sept 2025 → 28 Sept 2025

Time control

Standard: 60 minutes with 30 seconds increment from move 1

System

Swiss · 7 rounds

Top seed

🇧🇴Jose Damir Ruiz Achacollo1594

Avg top 10

1,186

Participants

Federations · 1 represented

🇧🇴Bolivia×13

Top 3

🥇
Jose Damir Ruiz Achacollo
🇧🇴BOL·1594
6.0pts·2253perf+50.0
🥈
Thiago Valentin Avila Calani
🇧🇴BOL·1556
5.5pts·1441perf-18.4
🥉
Matteo Ono Espinoza
🇧🇴BOL·1438
5.0pts·1491perf+17.2

How it unfolded

Top 6 · 7 rounds

Jose Damir Ruiz Achacollo led from R6; +0.5-point edge over the runner-up. Title race converged from 7 co-leaders at R4 to 1 by R6.

Co-leaders

Ruiz Achacollo6Avila Calani5.5Ono Espinoza5Argote Nunez4.5Ruiz Achacollo4.54.5

R6–R7 · LEAD HELD

Jose Damir Ruiz Achacollo held the sole lead from R6 through R7 without losing it.

WIN STREAKS · 2 top finishers

Jose Damir Ruiz Achacollo 6 wins (R2–R7)Thiago Valentin Avila Calani 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Jose Damir Ruiz Achacollo	*	—	—	1
2Thiago Valentin Avila Calani	—	*	1	½
3Matteo Ono Espinoza	—	0	*	½
4Eduardo Erick Argote Nunez	0	½	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Ruiz Achacollo, Jose Damir	1594	BOL	F	+17N	+5B	+15N	+10B	+4N	+7B	6.0	20.5	22.5	20.50	2253	+50.0
2	Avila Calani, Thiago Valentin	1556	BOL	+19B	+20N	=4B	−7N	+16B	+3B	+11N	5.5	20.0	20.0	13.75	1441	-18.4
3	Ono Espinoza, Matteo	1438	BOL	+18B	+14N	=15B	=4N	+7B	−2N	+13B	5.0	22.5	24.5	15.50	1491	+17.2
4	Argote Nunez, Eduardo Erick	1433	BOL	+11N	+8B	=2N	=3B	+9N	−1B	=6N	4.5	28.5	31.5	18.00	1495	+14.0
5	FIDE 3370844	0	—	−10B	+19N	−1N	+20B	+12N	=9B	+17N	4.5	19.0	19.0	8.25	1198	0.0
6	Ruiz Achacollo, Abner Thiago	0	BOL	F	+12B	−9N	+19B	+20N	+10N	=4B	4.5	15.5	15.5	9.75	1415	0.0
7	Flores Vallejos, Elian Jairo	1483	BOL	F	+16B	+10N	+2B	−3N	+11B	−1N	4.0	24.5	26.5	13.50	1491	+1.6
8	FIDE 3371387	0	—	+?B	−4N	−11N	+?B	+17B	−13N	+14B	4.0	15.5	15.5	5.00	628	0.0
9	Calle Zabala, Dusan	1455	BOL	+13B	−15N	+6B	+18N	−4B	=5N	F	3.5	22.0	24.0	11.75	663	-34.8
10	Chavez Armendia, Franco Manuel	1402	BOL	+5N	+21B	−7B	+13N	−1N	−6B	F	3.0	25.5	25.5	7.50	738	-25.6
11	Llanos Mendoza, William Mijael	0	BOL	−4B	+?N	+8B	+16N	F	−7N	−2B	3.0	22.5	22.5	6.00	688	0.0
12	Huallpa Ovando, Thiago Eison	0	BOL	−15B	−6N	+?B	+14N	−5B	+16N	F	3.0	18.5	18.5	5.00	698	0.0
13	FIDE 3360512	0	—	−9N	F	+20B	−10B	+18N	+8B	−3N	3.0	17.5	17.5	6.00	610	0.0
14	Sarzuri Ramirez, Ibrahim Oscar	0	BOL	+?N	−3B	−16N	−12B	+?N	+19B	−8N	3.0	15.5	15.5	1.50	613	0.0
15	Cardozo Palacios, Jose Ezequiel	1497	BOL	+12N	+9B	=3N	−1B	F	F	F	2.5	22.5	22.5	9.00	1474	-4.0
16	Fernandez Mamani, Danny Albert	0	BOL	F	−7N	+14B	−11B	−2N	−12B	+21N	2.0	24.5	24.5	3.00	719	0.0
17	FIDE 3371379	0	—	F	−1B	+?N	+21B	−8N	F	−5B	2.0	21.0	21.0	0.00	794	0.0
18	FIDE 3339483	0	—	−3N	+?B	+21N	−9B	−13B	F	F	2.0	14.5	14.5	0.00	615	0.0
19	FIDE 3341240	0	—	−2N	−5B	F	−6N	+21B	−14N	=?N	1.5	17.5	17.5	0.00	755	0.0
20	FIDE 3371344	0	—	F	−2B	−13N	−5N	−6B	F	F	0.0	22.0	22.0	0.00	755	0.0
21	FIDE 3371395	0	—	F	−10N	−18B	−17N	−19N	F	−16B	0.0	10.5	10.5	0.00	602	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Ruiz Achacollo, Jose DamirBOL
+50.0
6.0 pts · #1
2Ono Espinoza, MatteoBOL
+17.2
5.0 pts · #2
3Argote Nunez, Eduardo ErickBOL
+14.0
4.5 pts · #3

Top rating losers

1Calle Zabala, DusanBOL
-34.8
3.5 pts · #19
2Chavez Armendia, Franco ManuelBOL
-25.6
3.0 pts · #9
3Avila Calani, Thiago ValentinBOL
-18.4
5.5 pts · #7