1er. IRT Clasico Abierto AMAM 2025

Open SwissStandard

36 players participated in this 7-round tournament, held from 11 Oct 2025 to 12 Oct 2025 in Montero, Bolivia. Top 10 Elo average was 1660, and top seed was Carlos Zaigua Pedraza (🇧🇴 BOL, 1799).

Edson Trujillo Castro (🇧🇴 BOL, 0) won with 6.0/7, ahead of Jhonathan Acapa Mamani (5.5) and Jhon Erick Paco Vargas (5.0). Trujillo Castro clinched sole first place in the final round.

The biggest upset came in round 4: Lucas Enrique Montenegro Vilches (1598) beat Ernesto Foronda (1716), a +118-point gap.

Location

🇧🇴Montero, Bolivia

Dates

11 Oct 2025 → 12 Oct 2025

Time control

Standard: 30 minutes for game with 30 seconds increment from move 1

System

Swiss · 7 rounds

Top seed

🇧🇴Carlos Zaigua Pedraza1799

Avg top 10

1,660

Participants

Federations · 1 represented

🇧🇴Bolivia×32

Top 3

🥇
Edson Trujillo Castro
🇧🇴BOL
6.0pts·1689perf0.0
🥈
Jhonathan Acapa Mamani
🇧🇴BOL·1781
5.5pts·1972perf+13.4
🥉
Jhon Erick Paco Vargas
🇧🇴BOL·1771
5.0pts·1718perf-11.6

How it unfolded

Top 6 · 7 rounds

Edson Trujillo Castro led from R7; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R7.

Co-leaders

Trujillo Castro6Acapa Mamani5.5Montenegro Vilches5Foronda5Paco Vargas5Tito Ramirez5

R7 · LEADER CHANGE12 Oct

Edson Trujillo Castro takes the sole lead (6.0/7).

R7 · HEAD-TO-HEAD · WINNER VS 2ND

Edson Trujillo Castro beat Jhonathan Acapa Mamani (White).

WIN STREAKS · 3 top finishers

Edson Trujillo Castro 4 wins (R4–R7)Jhonathan Acapa Mamani 5 wins (R1–R5)Lucas Enrique Montenegro Vilches 3 wins (R2–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Edson Trujillo Castro	*	1	—	—
2Jhonathan Acapa Mamani	0	*	—	—
3Lucas Enrique Montenegro Vilches	—	—	*	1
4Ernesto Foronda	—	—	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Trujillo Castro, Edson	0	BOL	+11N	+27B	−3N	+16B	+?N	+8B	+2B	6.0	24.5	24.5	19.50	1689	0.0
2	Acapa Mamani, Jhonathan	1781	BOL	+23N	+29B	+7N	+8B	+4N	=3B	−1N	5.5	28.0	30.0	21.50	1972	+13.4
3	Paco Vargas, Jhon Erick	1771	BOL	+36B	+21N	+1B	−4N	+5B	=2N	=10B	5.0	29.0	29.0	19.00	1718	-11.6
4	Tito Ramirez, Jorge Alberto	1693	BOL	+26N	+13B	+33N	+3B	−2B	+7N	−5B	5.0	26.5	27.5	17.00	1591	-8.0
5	Montenegro Vilches, Lucas Enrique	1598	BOL	F	+22B	+25N	+6B	−3N	+11B	+4N	5.0	24.5	24.5	19.50	1861	+54.8
6	Foronda, Ernesto	1716	BOL	F	+35B	+14N	−5N	+19B	+23N	+12B	5.0	19.5	19.5	14.50	1713	0.0
7	Torrico Sanchez, Yamir	0	BOL	+?B	+12N	−2B	+15N	+10B	−4B	=8N	4.5	27.0	27.0	14.25	1673	0.0
8	Vargas Garzon, Maximiliano	1631	BOL	+31B	+28N	+9B	−2N	+12B	−1N	=7B	4.5	26.5	28.5	14.75	1656	+2.4
9	Villarroel Yucra, Lenin	0	BOL	+34B	+14N	−8N	=25B	−11B	+18N	+16N	4.5	22.0	23.0	13.25	1527	0.0
10	Zaigua Pedraza, Carlos	1799	BOL	F	+19B	+20N	+21B	−7N	+25B	=3N	4.5	21.5	23.5	14.50	1806	+1.6
11	Jaldin, Jose Fernando	1490	BOL	−1B	+31N	F	+20B	+9N	−5N	+15B	4.0	24.0	24.0	13.00	1547	+6.4
12	Medrano Andia, Pablo	1529	BOL	+32N	−7B	+27N	+33B	−8N	+13B	−6N	4.0	22.0	23.0	9.00	874	-24.8
13	Rivero Teran, Andre Alejandro	0	BOL	+15B	−4N	=?B	=17N	+14B	−12N	+27B	4.0	22.0	22.0	11.25	1551	0.0
14	Vargas Garzon, Isabella	1493	BOL	+35N	−9B	−6B	+28N	−13N	+29B	+24B	4.0	20.5	20.5	7.00	916	-8.8
15	Arancibia Vallejos, Emily Rosario	1468	BOL	−13N	+26B	+29N	−7B	+21N	=16B	−11N	3.5	21.5	23.5	9.25	1295	-21.2
16	Joffre Marino, Cristhian Adrian	1485	BOL	F	+34N	+23B	−1N	+27B	=15N	−9B	3.5	21.5	22.5	7.75	1497	+0.8
17	Pusarico Garcia, Marie Jane	1583	BOL	−24N	=18B	+22N	=13B	−25N	=26B	+30N	3.5	18.5	20.5	10.00	2293	+14.4
18	Arimoza Rojas, Thiago	0	BOL	−20B	=17N	+28B	−?N	+22N	−9B	+26N	3.5	18.5	18.5	9.25	1351	0.0
19	Arancibia Orellana, Jenner	1453	BOL	−33B	−10N	+31B	+35N	−6N	+21B	=25N	3.5	18.0	18.0	6.25	958	-12.0
20	Zambrana Salmon, Bruce Fabio	0	BOL	+18N	=25B	−10B	−11N	+33N	=?B	−22N	3.0	18.5	18.5	5.75	1322	0.0
21	Osinaga Siles, Pedro Nicolas	0	BOL	+?N	−3B	+30N	−10N	−15B	−19N	+35B	3.0	18.5	18.5	2.00	1465	0.0
22	Bustillos Villca, Felix	0	BOL	F	−5N	−17B	+34N	−18B	+31N	+20B	3.0	18.0	18.0	6.00	795	0.0
23	Ayala Rojas, Roberto	0	BOL	−2B	+?N	−16N	+32B	+30N	−6B	−?N	3.0	18.0	18.0	4.00	1458	0.0
24	Montano Lima, Santiago Andre	0	BOL	+17B	F	F	F	+32N	+30B	−14N	3.0	12.5	12.5	7.50	1548	0.0
25	Ocampo Romero, Eliezer Jhoan	0	BOL	F	=20N	−5B	=9N	+17B	−10N	=19B	2.5	24.5	27.5	9.00	1524	0.0
26	Flores Rivero, Angelica Antonela	0	BOL	−4B	−15N	+34B	−27N	+28B	=17N	−18B	2.5	19.5	20.5	4.75	1321	0.0
27	FIDE 3369242	0	—	F	−1N	−12B	+26B	−16N	+33B	−13N	2.0	24.5	25.5	3.50	708	0.0
28	Romero Vasquez, Jose Salvador	0	BOL	+30N	−8B	−18N	−14B	−26N	+34B	−29N	2.0	18.5	19.5	3.00	1416	0.0
29	FIDE 3365883	0	—	F	−2N	−15B	−30B	+36N	−14N	+28B	2.0	17.0	17.0	2.00	768	0.0
30	Quinaya Chilaca, Leonardo	1495	BOL	−28B	+36N	−21B	+29N	−23B	−24N	−17B	2.0	16.5	16.5	2.00	792	-14.4
31	Mercado Ortiz, Frank Nicolas	0	BOL	−8N	−11B	−19N	+36N	+35B	−22B	F	2.0	16.0	16.0	0.00	726	0.0
32	Oporto Sanchez, Luciana	0	BOL	−12B	−?N	+36B	−23N	−24B	+35N	F	2.0	10.0	10.0	0.00	713	0.0
33	Vaca Hurtado, Carlos Andres	0	BOL	+19N	F	−4B	−12N	−20B	−27N	F	1.0	20.5	22.5	3.50	1434	0.0
34	FIDE 3371697	0	—	−9N	−16B	−26N	−22B	F	−28N	+36B	1.0	15.5	15.5	0.00	686	0.0
35	Uscamayta Zegarra, Leandro	0	BOL	−14B	−6N	F	−19B	−31N	−32B	−21N	0.0	19.5	19.5	0.00	757	0.0
36	FIDE 3371700	0	—	−3N	−30B	−32N	−31B	−29B	F	−34N	0.0	14.0	14.0	0.00	832	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Montenegro Vilches, Lucas EnriqueBOL
+54.8
5.0 pts · #3
2Pusarico Garcia, Marie JaneBOL
+14.4
3.5 pts · #14
3Acapa Mamani, JhonathanBOL
+13.4
5.5 pts · #6

Top rating losers

1Medrano Andia, PabloBOL
-24.8
4.0 pts · #32
2Arancibia Vallejos, Emily RosarioBOL
-21.2
3.5 pts · #22
3Quinaya Chilaca, LeonardoBOL
-14.4
2.0 pts · #25

Biggest upsets

R4+118 Elo gap
Montenegro Vilches, Lucas Enrique1598 beat Foronda, Ernesto1716