IX Maraba Chess Open Std 2026

Open SwissStandard

71 players participated in this 7-round tournament, held from 04 Jun 2026 to 07 Jun 2026 in Maraba PA, Brazil. 3 titled players from 3 federations. Top 10 Elo average was 2155, and top seed was Everaldo Matsuura (🇧🇷 BRA, GM, 2341).

Alejandro Hoffman (🇦🇷 ARG, GM, 2300) won with 6.5/7, ahead of Everaldo Matsuura (6.5) and Vitor Luis De Jesus Silverio (5.5). Hoffman shared the lead from round 1, winning on tie-break.

The biggest upset came in round 5: Vitor Fael Barros Medrado (1533) beat Louis Dostoievsky Gomes Tabosa (1895), a +362-point gap.

Location

🇧🇷Maraba PA, Brazil

Dates

04 Jun 2026 → 07 Jun 2026

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 7 rounds

Top seed

🇧🇷GMEveraldo Matsuura2341

Avg top 10

2,155

Participants

Titled players · 3

GM×2

FM×1

Federations · 3 represented

🇧🇷Brazil×45

🇦🇷Argentina×1

🇺🇸United States of America×1

Top 3

🥇
GMAlejandro Hoffman
🇦🇷ARG·2300
6.5pts·2471perf+10.0
🥈
GMEveraldo Matsuura
🇧🇷BRA·2341
6.5pts·2460perf+6.4
🥉
Vitor Luis De Jesus Silverio
🇧🇷BRA·2120
5.5pts·2123perf+3.6

How it unfolded

Top 6 · 7 rounds

Tight race until R7; 2 players tied at 6.5/7, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.

Co-leaders

Matsuura6.5Hoffman6.5Silverio5.5De Sousa5.5Veiga5Chaves5

R7 · TIEBREAK CLUSTER

2 players finish on 6.5/7. Hoffman takes the title on Buchholz Cut1 (31.5).

R5 · HEAD-TO-HEAD · WINNER VS 2ND

GM Everaldo Matsuura drew with GM Alejandro Hoffman (White).

WIN STREAKS · 3 top finishers

GM Everaldo Matsuura 4 wins (R1–R4)GM Alejandro Hoffman 4 wins (R1–R4)Vitor Luis De Jesus Silverio 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMEveraldo Matsuura	*	½	—	—
2GMAlejandro Hoffman	½	*	—	1
3Vitor Luis De Jesus Silverio	—	—	*	—
4Werlles Milhomem De Sousa	—	0	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Hoffman, AlejandroGM	2300	ARG	+23N	+9B	+13N	+4B	=2N	+7B	+8N	6.5	31.5	35.5	32.25	2471	+10.0
2	Matsuura, EveraldoGM	2341	BRA	+33B	+25N	+14B	+19N	=1B	+20N	+6B	6.5	28.0	31.5	28.25	2460	+6.4
3	Silverio, Vitor Luis De Jesus	2120	BRA	+39N	+16B	=15N	−5B	+23N	+18B	+13N	5.5	27.0	30.0	22.75	2123	+3.6
4	De Sousa, Werlles Milhomem	2006	BRA	+38B	+35N	+53B	−1N	+28B	+5N	=7B	5.5	27.0	29.0	20.00	2210	+26.6
5	Chaves, Allysson Pereira	2174	BRA	+40N	+29B	−11N	+3N	+10B	−4B	+15N	5.0	29.5	32.5	22.00	2107	-8.2
6	Cunha,Adriano de Jesus Silva	2019	BRA	+69N	+27B	−22N	+15B	+9N	+11B	−2N	5.0	29.0	29.0	18.50	2076	+8.6
7	Veiga, Emerson de Sousa	2158	BRA	+50B	+28N	+32B	+22N	=21B	−1N	=4N	5.0	27.5	30.0	18.75	2133	+2.2
8	Soares, Joaquim Domingos	2042	BRA	+41B	−32N	+24B	+45N	+12B	+21N	−1B	5.0	26.0	29.0	19.00	2121	+12.6
9	De Sousa, Jadson Alves	1901	BRA	+60B	−1N	+31B	+33N	−6B	+40N	+20B	5.0	26.0	27.0	15.50	1998	+12.6
10	De Oliveira, Edilson Rufino	1983	BRA	+47N	−26B	+39N	+16B	−5N	+27B	+29N	5.0	24.5	27.0	18.00	1986	+2.6
11	Teixeira, Lindberg Rego	1953	BRA	+49B	+48N	+5B	=21N	=19B	−6N	+24B	5.0	24.5	27.0	18.00	2153	+25.6
12	De Sena, Antonio W. Oliveira	1923	BRA	+51N	+61B	−21N	+26B	−8N	+22B	+23N	5.0	23.5	24.5	15.50	1974	+13.2
13	Santos, Hugo Silva	1994	BRA	+43B	+45N	−1B	+24N	+22B	=14N	−3B	4.5	27.5	30.5	16.25	2020	+9.2
14	Abreu, Nilton Silva	1951	BRA	+44N	+34B	−2N	=32B	+36N	=13B	=16N	4.5	26.0	29.0	16.25	1969	+2.4
15	Pessoa, Marcio de Souza	1914	BRA	+62B	+54N	=3B	−6N	+47B	+19N	−5B	4.5	24.0	24.5	11.75	2003	+8.0
16	Alves, Ravel De Sousa	1883	BRA	+67B	−3N	+43B	−10N	+38B	+46N	=14B	4.5	24.0	24.0	11.25	1745	-18.8
17	Miranda, Max Alessandro Monteiro	1971	BRA	+52N	−22B	+30N	+27B	−20N	=32B	+48N	4.5	22.0	24.5	14.75	1786	-40.4
18	Kunapuli, Siddarth Sriaditya	1849	USA	+55B	−19N	=47B	+38N	+34B	−3N	+35B	4.5	22.0	24.0	13.25	1919	+9.6
19	Junior, Liduino F Vasconcelos	2048	BRA	+30N	+18B	+26N	−2B	=11N	−15B	=41N	4.0	28.5	31.5	16.50	1972	-10.6
20	DE ARAUJO,Jaylson Javier Silva	2068	BRA	+31B	−24N	+40B	+35N	+17B	−2B	−9N	4.0	27.5	30.5	15.00	1924	-20.6
21	Pinheiro, Iung Alicio de O.FM	2284	BRA	F	+42N	+12B	=11B	=7N	−8B	+25N	4.0	27.0	27.0	17.00	2104	-21.4
22	Da Silva, Lemuel Freires	1765	BRA	+71B	+17N	+6B	−7B	−13N	−12N	+43B	4.0	27.0	27.0	12.50	1941	+39.6
23	Silva, Mauricio Barbosa	1616	BRA	−1B	+60N	+54B	+42N	−3B	+28N	−12B	4.0	26.0	27.0	10.00	1875	+54.8
24	Da Cunha, Giovanni Maciel	1879	BRA	+64N	+20B	−8N	−13B	+30N	+39B	−11N	4.0	25.5	25.5	11.00	1846	-3.2
25	Pinto Filho, Joao Moreira	1904	BRA	+59N	−2B	+41N	=34B	=32N	+26B	−21B	4.0	24.5	25.5	11.50	1915	-3.2
26	Soares, Pedro Moises de Andrade	1802	BRA	+56B	+10N	−19B	−12N	+37B	−25N	+53B	4.0	23.5	25.5	12.50	1772	-6.0
27	Lima, Saymon Barreira	1834	BRA	+66B	−6N	+46B	−17N	+43B	−10N	+38B	4.0	23.5	23.5	9.00	1191	-35.2
28	De Melo, Wladimir Ferreira	1887	BRA	+65N	−7B	+44N	+53B	−4N	−23B	+39N	4.0	22.5	22.5	8.00	1635	-24.6
29	Batista, Francisco De Araujo	1892	BRA	+58B	−5N	−38B	+48N	+31B	+53N	−10B	4.0	21.5	23.0	10.00	1279	-10.8
30	De Oliveira, Rondemberg F Silva	0	BRA	−19B	+66N	−17B	+55N	−24B	+54N	+45B	4.0	19.5	19.5	7.00	1723	0.0
31	Borges, Filipe Costa	0	BRA	−20N	+59B	−9N	+62B	−29N	+60B	+42B	4.0	18.0	18.5	5.50	1746	0.0
32	Ramos, Janclei Mendes	1823	BRA	F	+8B	−7N	=14N	=25B	=17N	+47B	3.5	25.5	25.5	14.00	2005	+22.8
33	Andrade, Francisco Lauzeniro	1639	BRA	−2N	+36B	+56N	−9B	=52N	−48B	+49N	3.5	22.5	24.5	9.25	1757	+13.2
34	De Andrade, Isadora V Goncalves	1723	BRA	+68B	−14N	+49B	=25N	−18N	−41B	+50N	3.5	21.0	21.0	7.00	1727	-0.8
35	Moreira da Silva, Jairo	1785	BRA	+63N	−4B	+62N	−20B	=41N	+52B	−18N	3.5	20.0	20.5	5.00	1174	-15.8
36	Sa, Pollyclessio Mota	1706	BRA	+37B	−33N	=48B	+50N	−14B	−47N	+62B	3.5	19.0	19.5	7.75	1589	-19.6
37	FIDE 580007783	0	—	−36N	−44B	+64N	+57B	−26N	=49B	+59N	3.5	15.5	15.5	3.75	954	0.0
38	Luiz Leniman, Bernardo	0	BRA	−4N	+65B	+29N	−18B	−16N	+56B	−27N	3.0	24.5	24.5	6.00	1653	0.0
39	Medrado, Vitor Fael Barros	1533	BRA	−3B	+55N	−10B	+65N	+42B	−24N	−28B	3.0	23.5	23.5	5.00	1665	+20.8
40	Santos, Lucas Aires	1603	BRA	−5B	F	−20N	+44B	+56N	−9B	+46N	3.0	22.0	22.0	8.00	1169	-12.4
41	Jaques, Samuel Alves	0	BRA	−8N	F	−25B	+63N	=35B	+34N	=19B	3.0	20.5	20.5	7.75	1828	0.0
42	Tabosa, Louis Dostoievsky Gomes	1895	BRA	+70N	−21B	+52N	−23B	−39N	+44B	−31N	3.0	20.5	20.5	5.50	1011	-73.2
43	FIDE 538061210	0	—	−13N	+64B	−16N	+61B	−27N	+51B	−22N	3.0	20.5	20.5	3.50	1069	0.0
44	FIDE 538044579	0	—	−14B	+37N	−28B	−40N	+55B	−42N	+61N	3.0	20.0	21.0	6.50	1034	0.0
45	Costa, Rangel Cavalcante	1765	BRA	+57N	−13B	+61N	−8B	−53N	+59B	−30N	3.0	18.0	19.0	3.50	1218	-15.2
46	Da Silva, Silvano Vieira	0	BRA	−?N	+63B	−27N	+66B	+50N	−16B	−40B	3.0	14.5	14.5	3.00	1529	0.0
47	FIDE 44788207	0	—	−10B	F	=18N	+51B	−15N	+36B	−32N	2.5	23.5	23.5	8.25	1706	0.0
48	De Almeida, Lucas Araujo	0	BRA	F	−11B	=36N	−29B	+51N	+33N	−17B	2.5	23.0	23.0	7.75	1683	0.0
49	FIDE 538044544	0	—	−11N	+57B	−34N	−56B	+65B	=37N	−33B	2.5	19.0	19.0	3.25	972	0.0
50	Junior, Reginaldo Maia	1553	BRA	−7N	=51B	+59N	−36B	−46B	+63N	−34B	2.5	18.5	19.0	2.75	994	-26.4
51	FIDE 538015528	0	—	−12B	=50N	+60B	−47N	−48B	−43N	+63B	2.5	16.5	17.0	2.75	1545	0.0
52	De Azevedo,Etelvino Quintino Mir	0	BRA	−17B	+68N	−42B	+54N	=33B	−35N	F	2.5	16.5	16.5	3.75	1501	0.0
53	FIDE 22729003	0	—	F	+?B	−4N	−28N	+45B	−29B	−26N	2.0	20.5	20.5	3.00	1762	0.0
54	FIDE 580007775	0	—	F	−15B	−23N	−52B	+58N	−30B	+60N	2.0	17.5	17.5	2.50	965	0.0
55	FIDE 580007686	0	—	−18N	−39B	+57N	−30B	−44N	F	+64B	2.0	16.5	16.5	1.50	891	0.0
56	FIDE 580007724	0	—	−26N	F	−33B	+49N	−40B	−38N	+65B	2.0	16.0	16.0	2.50	881	0.0
57	FIDE 580007759	0	—	−45B	−49N	−55B	−37N	+64N	−61B	=58B	1.5	13.5	13.5	0.75	965	0.0
58	FIDE 580007643	0	—	−29N	F	F	F	−54B	+64B	=57N	1.5	7.5	7.5	0.75	1092	0.0
59	FIDE 580007619	0	—	−25B	−31N	−50B	F	+61N	−45N	−37B	1.0	18.0	18.0	1.00	941	0.0
60	FIDE 580007627	0	—	−9N	−23B	−51N	+64B	F	−31N	−54B	1.0	17.5	17.5	0.00	959	0.0
61	FIDE 580007694	0	—	F	−12N	−45B	−43N	−59B	+57N	−44B	1.0	16.5	16.5	1.50	1044	0.0
62	FIDE 580007600	0	—	−15N	F	−35B	−31N	=63B	F	−36N	0.5	18.0	18.0	0.25	1002	0.0
63	FIDE 580007732	0	—	−35B	−46N	F	−41B	=62N	−50B	−51N	0.5	15.0	15.0	0.25	869	0.0
64	FIDE 580007678	0	—	−24B	−43N	−37B	−60N	−57B	−58N	−55N	0.0	15.5	16.5	0.00	1079	0.0
65	FIDE 580007651	0	—	−28B	−38N	F	−39B	−49N	F	−56N	0.0	14.5	14.5	0.00	910	0.0
66	FIDE 580007708	0	—	−27N	−30B	F	−46N	F	F	F	0.0	13.5	13.5	0.00	1034	0.0
67	FIDE 580007660	0	—	−16N	F	F	F	F	F	F	0.0	7.5	7.5	0.00	1083	0.0
68	FIDE 580007767	0	—	−34N	−52B	F	F	F	F	F	0.0	7.0	7.0	0.00	923	0.0
69	Lima, Pericles da Silva	0	BRA	−6B	F	F	F	F	F	F	0.0	7.0	7.0	0.00	1219	0.0
70	FIDE 580007635	0	—	−42B	F	F	F	F	F	F	0.0	6.5	6.5	0.00	1095	0.0
71	FIDE 580007740	0	—	−22N	F	F	F	F	F	F	0.0	6.5	6.5	0.00	965	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Silva, Mauricio BarbosaBRA
+54.8
4.0 pts · #21
2Da Silva, Lemuel FreiresBRA
+39.6
4.0 pts · #24
3De Sousa, Werlles MilhomemBRA
+26.6
5.5 pts · #11

Top rating losers

1Tabosa, Louis Dostoievsky GomesBRA
-73.2
3.0 pts · #61
2Miranda, Max Alessandro MonteiroBRA
-40.4
4.5 pts · #29
3Lima, Saymon BarreiraBRA
-35.2
4.0 pts · #68

Biggest upsets

R5+362 Elo gap
Medrado, Vitor Fael Barros1533 beat Tabosa, Louis Dostoievsky Gomes1895
R4+279 Elo gap
Silva, Mauricio Barbosa1616 beat Tabosa, Louis Dostoievsky Gomes1895
R6+271 Elo gap
Silva, Mauricio Barbosa1616 beat De Melo, Wladimir Ferreira1887