IV Manaus Chess Open 2025

SwissStandard

97 players participated in this 9-round tournament, held from 11 Oct 2025 to 17 Oct 2025 in Manaus AM, Brazil. 32 titled players from 8 federations. Top 10 Elo average was 2491, and top seed was Rafael Leitao (🇧🇷 BRA, GM, 2599).

Rafael Leitao (🇧🇷 BRA, GM, 2599) won with 7.0/9, ahead of Mathias Andre Casalaspro (7.0) and Neuris Delgado Ramirez (7.0). Leitao won on tie-break after catching the field in the final round.

The biggest upset came in round 6: Victor Gabriel C. De Oliveira (CM, 2173) beat Alexandr Fier (GM, 2577), a +404-point gap.

Location

🇧🇷Manaus AM, Brazil

Dates

11 Oct 2025 → 17 Oct 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇧🇷GMRafael Leitao2599

Avg top 10

2,491

Participants

Titled players · 32

GM×12

IM×6

FM×9

CM×2

WIM×1

WFM×2

Federations · 8 represented

🇧🇷Brazil×78

🇦🇷Argentina×2

🇵🇾Paraguay×2

🇧🇴Bolivia×2

🇵🇹Portugal×2

🇺🇾Uruguay×1

🇨🇱Chile×1

🇱🇾Libya×1

Top 3

🥇
GMRafael Leitao
🇧🇷BRA·2599
7.0pts·2530perf-4.1
🥈
FMMathias Andre Casalaspro
🇧🇷BRA·2261
7.0pts·2492perf+55.8
🥉
GMNeuris Delgado Ramirez
🇵🇾PAR·2488
7.0pts·2596perf+13.3

How it unfolded

Top 6 · 9 rounds

Tight race until R9; 3 players tied at 7.0/9, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 3 at the finish.

Co-leaders

Delgado Ramirez7Casalaspro7Leitao7Santiago6.5Sunye Neto6.5Cunha6.5

R9 · TIEBREAK CLUSTER

3 players finish on 7.0/9. Leitao takes the title on Buchholz Cut1 (46.5).

R1–R4 · WIN STREAK

GM Neuris Delgado Ramirez won 4 in a row (R1–R4).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMNeuris Delgado Ramirez	*	—	½	—
2FMMathias Andre Casalaspro	—	*	—	½
3GMRafael Leitao	½	—	*	1
4GMYago De Moura Santiago	—	½	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Leitao, RafaelGM	2599	BRA	+39B	+52N	−16B	+30N	+19B	=3N	+21B	=10N	+4B	7.0	46.5	50.5	38.00	2530	-4.1
2	Casalaspro, Mathias AndreFM	2261	BRA	+45B	+55N	=4B	+32N	=9B	=12N	+41B	=6N	+8B	7.0	45.0	49.0	36.50	2492	+55.8
3	Delgado Ramirez, NeurisGM	2488	PAR	+40B	+41N	+29N	+69B	=7N	=1B	=10B	=8N	+9B	7.0	45.0	48.5	36.00	2596	+13.3
4	Santiago, Yago De MouraGM	2486	BRA	+37N	+24B	=2N	=6B	+29N	+13B	=7N	+5B	−1N	6.5	49.5	54.0	37.25	2497	+3.6
5	Cunha, Lucas AguiarFM	2256	BRA	+50B	+57N	=32B	=14N	+16B	=18N	+12B	−4N	+20B	6.5	45.0	49.0	34.00	2477	+55.4
6	Sunye Neto, JaimeGM	2370	BRA	+58B	=26N	+53B	=4N	=51B	=15N	+17B	=2B	+22N	6.5	44.0	48.0	33.75	2325	-1.9
7	Bachmann, AxelGM	2578	PAR	F	+21N	+10B	+16N	=3B	=8N	=4B	=9N	+15B	6.0	49.0	49.0	36.25	2565	+0.4
8	Molina, Roberto Junio BritoIM	2379	BRA	+46N	+48B	=20N	+23B	+11N	=7B	=14N	=3B	−2N	6.0	47.5	51.5	32.25	2440	+9.7
9	Quintiliano, Renato R.GM	2489	BRA	+97N	+36B	+13N	−11B	=2N	+24B	+22N	=7B	−3N	6.0	47.5	47.5	28.00	2430	-4.1
10	Perez Gormaz, MatiasIM	2381	CHI	F	+27B	−7N	+33B	+26N	+11B	=3N	=1B	+14N	6.0	47.0	47.0	34.00	2529	+17.0
11	Rodriguez Vila, AndresGM	2445	URU	+25B	+31N	+17B	+9N	−8B	−10N	−15B	+38N	+30B	6.0	45.5	50.0	32.00	2339	-8.4
12	Matsuura, EveraldoGM	2384	BRA	+54N	=23B	+22N	=26B	+36N	=2B	−5N	+73B	=19N	6.0	44.0	47.0	28.75	2282	-9.6
13	De Siqueira, Luigy LiraFM	2366	BRA	+34B	+38N	−9B	+28N	+31B	−4N	+30B	−15N	+26B	6.0	43.5	48.0	29.50	2273	-13.6
14	Filgueiras, Nathan FelipeIM	2399	BRA	+66N	+33B	=73N	=5B	=22N	+23B	=8B	+29N	−10B	6.0	43.0	46.0	29.50	2336	-10.4
15	Lira, Suan Bruno Fernandes	2152	BRA	+68N	−20B	+80N	+35B	=69N	=6B	+11N	+13B	−7N	6.0	42.0	44.5	28.00	2374	+100.4
16	Ticona Rocabado, Licael RoderickIM	2398	BOL	+91B	+28N	+1N	−7B	−5N	−26B	+80N	+31B	+51N	6.0	41.0	42.0	24.50	2316	-5.1
17	Arias Gaviria, Mario AlexisFM	2259	PER	+76N	+35B	−11N	−27B	+34N	+38B	−6N	+49B	+48N	6.0	40.0	43.0	25.50	2176	-11.6
18	Stamenkovic, DraganIM	2368	SRB	+62N	=49B	+43N	=20B	=27N	=5B	=52N	=48B	+28N	6.0	38.5	42.5	28.00	2247	-9.6
19	Terao, Juliana SayumiFM	2245	BRA	+70N	+42B	−69N	+48B	−1N	=49B	+65N	+23B	=12B	6.0	38.0	41.5	26.00	2253	+6.0
20	Fier, AlexandrGM	2577	BRA	+93B	+15N	=8B	=18N	=73B	−21N	+26N	+52B	−5N	5.5	42.0	42.5	23.00	2314	-23.9
21	De Oliveira,Victor Gabriel C.CM	2173	BRA	+56N	−7B	+37N	=49B	+66N	+20B	−1N	=32N	=25B	5.5	41.5	45.0	24.75	2241	+15.6
22	Pereira, Silvio CunhaIM	2206	BRA	+47B	+94N	−12B	+65N	=14B	+51N	−9B	+41N	−6B	5.5	41.0	41.0	19.50	2245	+11.0
23	Souza Neves, Andrey M.FM	2074	BRA	+84B	=12N	+85B	−8N	+67B	−14N	+37B	−19N	+36B	5.5	38.5	40.5	19.50	2162	+22.4
24	Gauche, CharlesFM	2151	BRA	+78B	−4N	+59B	=67N	+53B	−9N	=57B	=44N	+40B	5.5	37.0	40.0	21.50	2077	-12.8
25	De Oliveira, Tiago Augusto Adami	1861	BRA	−11N	+72B	−36N	+64B	=48N	+79B	=27N	+39B	=21N	5.5	36.5	39.0	21.25	2048	+72.4
26	El Zwei, Aiman Mohamed	2025	LBA	+89N	=6B	+79N	=12N	−10B	+16N	−20B	+43B	−13N	5.0	43.0	44.5	20.75	2243	+30.6
27	Mesquita, Eduardo Barbosa	2060	BRA	+90B	−10N	+45B	+17N	=18B	−32N	=25B	+50N	−29B	5.0	42.0	43.0	21.25	2142	+14.8
28	Caceres, Diego	2070	BOL	+63N	−16B	+34N	−13B	+70N	−29B	+46N	+35B	−18B	5.0	41.5	45.0	22.00	2089	+2.8
29	Hoffman, AlejandroGM	2312	ARG	F	+65N	−3B	+38N	−4B	+28N	+50B	−14B	+27N	5.0	41.5	41.5	22.00	2260	-2.4
30	Silverio, Vitor Luis De Jesus	2083	BRA	+83N	−69B	+62N	−1B	+76N	+35B	−13N	+53B	−11N	5.0	38.5	41.0	18.50	2128	+17.2
31	Dornelles, Marcio Neron Camargo	2092	BRA	+61N	−11B	+54N	+75B	−13N	=65B	+66N	−16N	=37B	5.0	37.5	40.5	18.50	2059	-6.6
32	Galego, LuisGM	2426	POR	+80N	+51B	=5N	−2B	=49N	+27B	=73N	=21B	F	5.0	37.5	37.5	21.00	2234	-16.4
33	Oliveira, Tiago Batista	2091	BRA	+74B	−14N	+58B	−10N	=40B	−50N	+76B	+47N	=73N	5.0	35.0	38.0	18.25	2004	-15.8
34	Vicuna, Frayser Serquen	1773	BRA	−13N	+89B	−28B	+86N	−17B	+74N	−44B	+71N	+55B	5.0	34.0	35.5	14.00	1922	+26.2
35	Andrade, Artur Diego De Souza	1920	BRA	+92B	−17N	+94B	−15N	+45B	−30N	+85B	−28N	+50B	5.0	33.0	33.0	11.00	1939	+2.4
36	Zallio, Luciano de SouzaCM	2162	BRA	+60B	−9N	+25B	+55N	−12B	=57N	−48N	+66B	−23N	4.5	39.0	42.5	19.00	2030	-28.0
37	Nunes, Agatha HurbaWFM	1894	BRA	−4B	+60N	−21B	F	+68N	+54B	−23N	+56B	=31N	4.5	38.0	38.0	18.00	1994	+19.4
38	Nejanky, MaisaWFM	1971	ARG	+77N	−13B	+76N	−29B	+75N	−17N	+59B	−11B	=53N	4.5	37.0	40.0	15.00	2026	+4.6
39	De Brito, Irineu Evangelista C	1904	BRA	−1N	+64B	=52B	=43N	−50B	=75N	+60B	−25N	+82B	4.5	36.0	38.5	16.25	1867	-23.6
40	De Souza, Mateus Nascimento	1895	BRA	−3N	=68B	=56N	+82B	=33N	−66B	+79N	+62B	−24N	4.5	35.0	37.5	15.25	1876	-16.4
41	Pirola, Claudionor Alcides Lima	2130	BRA	+72N	−3B	=66N	+71B	+85N	+69B	−2N	−22B	F	4.5	35.0	35.0	13.75	2109	0.0
42	Barbosa, Celio Oliveira	1914	BRA	+81B	−19N	+87B	−51N	=43B	−47N	=75B	=70N	+61N	4.5	32.0	34.0	14.00	1756	-31.4
43	Santos, Alan Gomes Florencio	1724	BRA	F	+96N	−18B	=39B	=42N	=53N	+55B	−26N	+57B	4.5	32.0	32.0	14.50	1984	+52.6
44	Felix, Raimundo Nascimento	1941	BRA	=79B	−67N	+47B	−85N	=71N	+82B	+34N	=24B	−52N	4.5	31.0	33.0	17.75	1871	-15.2
45	Bucci, Andrea Vidigal	1767	BRA	−2N	+77B	−27N	+61B	−35N	+94B	F	=75B	+68N	4.5	30.5	30.5	12.00	1821	+4.6
46	Sturza, Vernei Dutra	1811	BRA	−8B	=84N	+88B	−52N	=74B	+71N	−28B	+72N	=65B	4.5	30.0	32.0	12.75	1840	+7.6
47	Dias, Juliane de Oliveira	1754	BRA	−22N	+97B	−44N	=54B	+84N	+42B	F	−33B	+80N	4.5	28.0	28.0	11.00	1942	+37.8
48	Carvalho, Felipe Lobo C.	2038	BRA	F	−8N	+50B	−19N	=25B	+67N	+36B	=18N	−17B	4.0	41.5	41.5	17.75	2101	+11.8
49	Pinto, Pedro Jorge de Moraes	1940	BRA	F	=18N	=67B	=21N	=32B	=19N	=51B	−17N	+54B	4.0	40.0	40.0	19.00	2133	+34.2
50	Machado, Vinicius de Camargo	1761	BRA	−5N	+95B	−48N	+63B	+39N	+33B	−29N	−27B	−35N	4.0	39.0	39.0	13.50	1890	+16.0
51	Librelato, Kathie GoulartWIM	2104	BRA	+86B	−32N	F	+42B	=6N	−22B	=49N	+57N	−16B	4.0	37.5	38.5	15.75	2108	+0.6
52	Aranha Filho, Alvaro Z.FM	2192	BRA	F	−1B	=39N	+46B	F	+55N	=18B	−20N	+44B	4.0	36.0	36.0	18.25	2209	+3.4
53	Bezerra, Fabiano de Oliveira	1894	BRA	F	+71B	−6N	+84B	−24N	=43B	+70N	−30N	=38B	4.0	35.0	35.0	13.50	1904	+1.8
54	Benayon,Elismar da Silva	1831	BRA	−12B	+74N	−31B	=47N	+60B	−37N	+84B	=65N	−49N	4.0	34.5	36.5	13.00	1817	-4.6
55	Veiga da Silva, Paulo Roberto Costa	1919	BRA	+95N	−2B	+82N	−36B	+72N	−52B	−43N	+68B	−34N	4.0	34.0	34.0	9.00	1821	-48.8
56	Grosselli, Marcel Robinson	1727	BRA	−21B	=93N	=40B	+59N	−65B	=58N	+67B	−37N	=62N	4.0	33.5	34.0	14.00	1840	+50.4
57	Moyses Sobrinho, Elias	1904	BRA	+87N	−5B	−75N	+68B	+94N	=36B	=24N	−51B	−43N	4.0	33.5	33.5	10.50	1820	-18.6
58	Presa, Luis Alberto Passos	1801	BRA	−6N	+63B	−33N	−72B	+92N	=56B	−68N	+84B	=64N	4.0	32.0	32.5	10.50	1652	-30.8
59	Ordozgoite, Gabriel Bento	1843	BRA	−69N	+61B	−24N	−56B	+77N	+72B	−38N	=64B	=75N	4.0	31.5	34.5	13.50	1782	-36.0
60	Brandalise, Ricardo	1713	BRA	−36N	−37B	+83N	=62B	−54N	+61B	−39N	+81B	=67N	4.0	31.5	34.0	12.75	1727	-0.4
61	Rodrigues, Jaderson Para	1674	BRA	−31B	−59N	+81B	−45N	+87B	−60N	+63B	+85N	−42B	4.0	30.5	32.5	10.50	1585	-26.8
62	Da Silva, Camila Evaristo	1783	BRA	−18B	+90N	−30B	=60N	−79B	+86N	+81B	−40N	=56B	4.0	30.5	31.5	9.50	1757	-7.8
63	Dos Santos, Gabriel Junior R	0	BRA	−28B	−58N	+78B	−50N	+96N	−70B	−61N	+86B	+74B	4.0	28.5	28.5	8.00	1731	0.0
64	De Lima, Bonifacio Coelho	1752	BRA	−73B	−39N	+90B	−25N	+95B	−80B	+94N	=59N	=58B	4.0	24.5	24.5	5.00	1631	-35.2
65	Marques, Eudes Pinto	1936	BRA	F	−29B	+70N	−22B	+56N	=31N	−19B	=54B	=46N	3.5	37.5	37.5	14.25	1955	0.0
66	Felizes, Paulo	1839	POR	−14B	+86N	=41B	+79N	−21B	+40N	−31B	−36N	F	3.5	34.5	34.5	11.25	1952	+14.2
67	De Souza, Samuel Gomes Pereira	1770	BRA	F	+44B	=49N	=24B	−23N	−48B	−56N	+88N	=60B	3.5	33.5	33.5	13.25	1848	+24.8
68	Da Silva, Nayron Igor Tomaz	1706	BRA	−15B	=40N	+96B	−57N	−37B	+88N	+58B	−55N	−45B	3.5	33.5	33.5	8.25	1772	+12.2
69	Flom, GabrielGM	2425	FRA	+59B	+30N	+19B	−3N	=15B	−41N	F	F	F	3.5	32.5	32.5	18.00	2244	-11.3
70	Nunes, Rafael Klanfer	1760	BRA	−19B	+81N	−65B	+87N	−28B	+63N	−53B	=42B	F	3.5	31.5	31.5	10.75	1629	-12.0
71	Santos, Marlon De Jesus	1742	BRA	F	−53N	+93B	−41N	=44B	−46B	+95N	−34B	+77N	3.5	26.0	26.0	5.75	1715	-5.8
72	Vieira, Erico Vinicius Duarte	1693	BRA	−41B	−25N	+92B	+58N	−55B	−59N	+87N	−46B	F	3.0	31.5	32.0	6.50	1615	-11.2
73	Van Zyl-Rudd, JackFM	2203	RSA	+64N	F	=14B	F	=20N	F	=32B	−12N	=33B	3.0	31.5	31.5	14.75	2280	+12.0
74	Gomes, Carlos	1673	BRA	−33N	−54B	=77N	+78B	=46N	−34B	−82N	+87B	−63N	3.0	31.0	33.0	8.75	1631	-7.8
75	Guerreiro, Gustavo Lohan Matos	1748	BRA	F	F	+57B	−31N	−38B	=39B	=42N	=45N	=59B	3.0	31.0	31.0	12.75	1864	+40.0
76	Da Silva, Sandra De Jesus F.	1766	BRA	−17B	+92N	−38B	+95N	−30B	=81N	−33N	−79B	=84N	3.0	28.0	28.0	2.75	1597	-36.0
77	Coelho, Valentina Martins Araujo	0	BRA	−38B	−45N	=74B	+88N	−59B	−84N	=78B	+89N	−71B	3.0	26.5	28.0	6.50	1525	0.0
78	Rodrigues Franca, Carlos Alberto	1701	BRA	−24N	−80B	−63N	−74N	+89B	=92B	=77N	+94B	F	3.0	23.0	23.0	3.25	1078	-36.4
79	Breves, Ryan Freitas Marinho Da C	0	BRA	=44N	F	−26B	−66B	+62N	−25N	−40B	+76N	−85B	2.5	32.0	32.0	9.25	1727	0.0
80	De Oliveira, Glaucia Nadine Nasc	1861	BRA	−32B	+78N	−15B	F	F	+64N	−16B	=82N	−47B	2.5	31.0	31.0	8.25	1846	-18.4
81	Ramos, Jonathan Monteiro	0	BRA	−42N	−70B	−61N	F	+86B	=76B	−62N	−60N	+90B	2.5	26.0	26.0	4.50	1527	0.0
82	Carvalho, Alex Torres	1755	BRA	F	F	−55B	−40N	+90B	−44N	+74B	=80B	−39N	2.5	24.0	24.0	5.25	1673	-24.8
83	Mendes, Paulo Victor Penafort	1545	BRA	−30B	−91N	−60B	F	−88B	=89N	+90N	+92B	F	2.5	15.5	15.5	2.25	959	-41.2
84	Dos Santos, Celso Freire	1502	BRA	−23N	=46B	F	−53N	−47B	+77B	−54N	−58N	=76B	2.0	32.5	32.5	6.75	1514	+1.6
85	Reis, Virginia Lagrange M.	1833	BRA	F	F	−23N	+44B	−41B	F	−35N	−61B	+79N	2.0	28.0	28.0	7.00	1708	-15.8
86	Da Silva, Luciana de Maria Rocha	1687	BRA	−51N	−66B	+89N	−34B	−81N	−62B	F	−63N	+95B	2.0	24.5	24.5	1.50	1071	-22.6
87	FIDE 538065649	0	—	−57B	F	−42N	−70B	−61N	+90N	−72B	−74N	+94B	2.0	23.0	23.0	1.00	970	0.0
88	Farias, Sergio Luiz Cardoso	1541	BRA	F	F	−46N	−77B	+83N	−68B	+92N	−67B	F	2.0	19.5	19.5	3.00	1515	-3.0
89	Reis, Lucas Ferro	0	BRA	−26B	−34N	−86B	−90N	−78N	=83B	F	−77B	+92N	1.5	22.0	22.0	1.75	1380	0.0
90	FIDE 538006138	0	—	−27N	−62B	−64N	+89B	−82N	−87B	−83B	F	−81N	1.0	24.0	24.0	1.50	979	0.0
91	Pessoa, Hudson Anselmo	1835	BRA	−16N	+83B	F	F	F	F	F	F	F	1.0	12.5	12.5	2.50	1890	+1.6
92	Barreto, Dhara Munique Domingues	0	BRA	−35N	−76B	−72N	F	−58B	=78N	−88B	−83N	−89B	0.5	25.0	26.5	1.50	1288	0.0
93	Bazzo, Juliano Joao	1900	BRA	−20N	=56B	−71N	F	F	F	F	F	F	0.5	13.0	13.0	2.00	1650	-20.4
94	FIDE 538053489	0	—	F	−22B	−35N	F	−57B	−45N	−64B	−78N	−87N	0.0	28.5	28.5	0.00	1075	0.0
95	FIDE 538053420	0	—	−55B	−50N	F	−76B	−64N	F	−71B	F	−86N	0.0	20.5	20.5	0.00	971	0.0
96	Cardoso, Manuel Augusto Pinto	1842	BRA	F	−43B	−68N	F	−63B	F	F	F	F	0.0	14.0	14.0	0.00	915	-53.6
97	Pessoa, Marcio de Souza	1897	BRA	−9B	−47N	F	F	F	F	F	F	F	0.0	12.5	12.5	0.00	1226	-15.4

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Lira, Suan Bruno FernandesBRA
+100.4
6.0 pts · #17
2De Oliveira, Tiago Augusto AdamiBRA
+72.4
5.5 pts · #37
3Casalaspro, Mathias AndreFMBRA
+55.8
7.0 pts · #2

Top rating losers

1Cardoso, Manuel Augusto PintoBRA
-53.6
0.0 pts · #95
2Veiga da Silva, Paulo Roberto CostaBRA
-48.8
4.0 pts · #58
3Mendes, Paulo Victor PenafortBRA
-41.2
2.5 pts · #97

Biggest upsets

R6+404 Elo gap
CMDe Oliveira,Victor Gabriel C.2173 beat GMFier, Alexandr2577
R6+373 Elo gap
El Zwei, Aiman Mohamed2025 beat IMTicona Rocabado, Licael Roderick2398
R6+330 Elo gap
Machado, Vinicius de Camargo1761 beat Oliveira, Tiago Batista2091