Alexandr Fier triumphs in Caiobá

by Pablo Alejandro Acosta
7/16/2025 – The ninth edition of the Abierto Sesc Caiobá turned the Brazilian city of Caiobá into a prime destination for chess enthusiasts. With over 200 participants and a diverse program, the event combined classical tournaments, rapid and blitz competitions, training sessions, and community activities—all set against the backdrop of a stunning seaside location. Brazil’s Alexandr Fier emerged as the winner of the main event, while Argentina’s Sandro Mareco and the USA’s Conrad Holt claimed victories in the rapid and blitz sections, respectively. | Photos: CEX Paraná

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Chess on Brazil’s Beaches

The ninth edition of the Abierto Sesc Caiobá was recently held on Brazil’s coast. For an entire week, the sound of crashing waves blended with the ticking of digital clocks and the quiet movement of chess pieces across the board.

Carefully organized by the Center for Chess Excellence, with essential support from Sesc Caiobá, the tournament brought together chess masters from around the world. Around 200 amateur and professional players, coaches, arbiters, and entire families took part, turning the city of Caiobá (Matinhos, Paraná) into the temporary chess capital of South America.

Abierto Ajedrez SESC Caiobá 2025

Abierto Ajedrez SESC Caiobá 2025

Alexandr Fier Dominates the Classical Tournament

As in previous editions, the main event was the classical tournament, played over nine rounds in the Swiss system. More than 200 players from various countries took part, including numerous Grandmasters (GMs), International Masters (IMs), and rising young talents.

The clear winner was Brazilian Grandmaster Alexandr Fier, who claimed the title with an outstanding score of 8 out of 9 points, showcasing both his strength and experience. Fier, a successful competitor in Olympiads and European tournaments, displayed fighting spirit, tactical sharpness, and great precision in the decisive moments.

Second place went to Serbian GM Aleksa Strikovic, who scored 7½ points and, at 63 years old, continued to offer lessons in positional play and strategic depth. The podium was completed by Brazilian GM Renato Quintiliano, also with 7½ points. Bolivian IM Licael Ticona had the same score but a worse tiebreak.

This video course includes GM Anish Giri's deep insights and IM Sagar Shah's pertinent questions to the super GM. In Vol.1 all the openings after 1.e4 are covered.

Abierto Ajedrez SESC Caiobá 2025

Rapid and Blitz: Fast-Paced Chess, High-Paced Emotions

As is tradition in Caiobá, the tournament program also featured two parallel events that thrilled both players and spectators: the rapid tournament (15+5) and the electrifying blitz tournament (3+2).

In the rapid event, the standout performer was Argentine Grandmaster Sandro Mareco, the top-ranked player in his country and a regular competitor in major continental tournaments. Mareco demonstrated technical skill, precision, and a determined approach, securing the title with a flawless performance.

The blitz tournament, in turn, was a true celebration of speed and mental reflexes. The winner was American GM Conrad Holt, who emerged on top in a field full of talent. Known for his ability to calculate complex positions at lightning speed, Holt proved that in blitz mode, he was always one move ahead.

More information on chess-results: Rapid | Blitz

Abierto Ajedrez SESC Caiobá 2025

More Than Just a Tournament: Education, Community, and Chess Culture

One of the most appreciated aspects of the event was the diversity of its accompanying program. Technical lectures, panel discussions, and open training sessions were offered, designed not only for players but also for coaches and parents.

Topics covered included high-performance sports psychology, training methods for children and young talents, preparation for international tournaments, analysis of elite-level games, and chess as an educational tool. Among the featured speakers were Masters Valerio Brusamolin, Augusto Tirado, and Ernani Buchmann.

This educational and community-focused approach gives the tournament a unique place in the region. Caiobá offers not just a competitive environment, but also a space for learning, exchange, and growth for the entire chess community.

This is how participants experienced the 9th edition of this international tournament, an event that has become a fixture in the traditional Latin American chess calendar and one that exceeded all expectations this year.

Abierto Ajedrez SESC Caiobá 2025

A Seamless Experience: Organization, Hospitality, and a Model Event

None of this would have been possible without a solid organizational foundation. The main responsibility once again rested with the Center for Chess Excellence, an institution dedicated to the holistic development of Brazilian chess. Its technical and logistical team ensured the smooth running of the entire event: every round started on time, social media coverage was extensive, games were published in real time, and participants received personalized support throughout.

The tournament also featured a rare highlight: all players were housed in the same building where the games were played—the beautiful Sesc Caiobá hotel, located right on the beach. This setting offered not only comfort and high-quality meals, but also a warm, relaxed atmosphere that blended sport, vacation, and culture in an ideal way.

Players of all ages praised the quality of the accommodations, the natural beauty of the surroundings, and the unique opportunity to live and interact closely with international champions—all of which created a family-like and enriching environment.

With a record number of participants, an extremely high level of play, and an infrastructure rivaling major European chess festivals, Caiobá is establishing itself as a model of organization and hospitality in the chess world. Anticipation is already building for the tournament’s tenth edition in 2026.

Abierto Ajedrez SESC Caiobá 2025

Final standings

Rk Name Elo FED Pts Tb1 Tb2 Tb 3
1
GM Fier Alexandr 2556 BRA 8 42,5 50 47,00
2
GM Strikovic Aleksa 2364 SRB 7,5 44 52 45,00
3
GM Quintiliano Renato R. 2511 BRA 7,5 40 46,5 42,50
4
IM Ticona Rocabado Licael Roderick 2359 BOL 7,5 36 42,5 37,50
5
GM Santiago Yago De Moura 2482 BRA 7 42 50 40,75
6
GM Delgado Ramirez Neuris 2489 PAR 7 41,5 49 40,75
7
GM Mareco Sandro 2585 ARG 7 40,5 48 40,00
8
IM Di Berardino Diego Rafael 2448 BRA 7 40,5 47 39,75
9
GM Holt Conrad 2540 USA 7 40,5 46,5 38,75
10
IM Do Valle Cardoso Lucas 2414 BRA 6,5 44,5 52,5 38,25
11
FM Silva Kaua Marques 2254 BRA 6,5 43,5 50,5 36,75
12
GM Rodriguez Vila Andres 2447 URU 6,5 42,5 50 36,50
13
GM Movsziszian Karen 2382 ARM 6,5 40,5 48 35,75
14
FM Melian Juan Sebastian 2358 PAR 6,5 40 48 34,50
15
GM Tristan Leonardo 2536 ARG 6,5 39 45,5 34,75
16
IM Soriano Quispe Ivan Excender 2361 PER 6 42,5 50 32,25
17
FM Rodrigues Edgar 2273 BRA 6 42 50 32,00
18
IM Umetsubo Cesar Hidemitsu 2359 BRA 6 42 49 33,75
19
FM Casalaspro Mathias Andre 2319 BRA 6 41,5 48,5 33,75
20
GM Mekhitarian Krikor Sevag 2564 BRA 6 40,5 48 31,50

...204 players...

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MoveNResultEloPlayers
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1.Nc33,91950%2383---
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1.Nf3 g6 2.c4 c5 3.d4 cxd4 4.Nxd4 Bg7 5.e4 Nc6 6.Be3 Nf6 7.Nc3 d6 8.Be2 0-0 9.0-0 Bd7 10.Qd2 Nxd4 11.Bxd4 Bc6 12.f3 a6 13.b4 b6 14.Rfd1 Bb7 15.Qb2 Bc6 16.Rac1 Qb8 17.Nd5 Bxd5 18.cxd5 Rc8 19.Rxc8+ Qxc8 20.Rc1 Qd7 21.Qc3 a5? 22.Qc6 Qxc6?! 23.dxc6 Ne8 24.Bxb6 axb4 25.c7 Bc3 26.Bc4?? e6?? 27.a4?? Nxc7 28.Bxc7?! ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
Mareco,S2585Figueroa,M1880½–½ B38Round 1: Mareco, Sandro - Figueroa, Matias Alejandro1.1
Ruvieri,D1873Mekhitarian,K25640–1 B90Round 1: Ruvieri, Daniel Minami - Mekhitarian, Krikor Sevag1.2
Fier,A2556De Carvalho Machado,F18721–0 B23Round 1: Fier, Alexandr - De Carvalho Machado, Fernando1.3
Kanzler,K1868Holt,C25400–1 A06Round 1: Kanzler, Karina Daniela Ferreira - Holt, Conrad1.4
Tristan,L2536Oliveira,O18641–0 A45Round 1: Tristan, Leonardo - Oliveira, Olavo Tadeu Carvalho1.5
Moura,B1863Quintiliano,R25110–1 B51Round 1: Moura, Bernardo Lalane Mascarenha - Quintiliano, Renato R.1.6
Delgado Ramirez,N2489Gomes,M18581–0 A16Round 1: Delgado Ramirez, Neuris - Gomes, Maria Eduarda Papini1.7
Spagnollo,P1857Santiago,Y24820–1 A01Round 1: Spagnollo, Pedro Henrique - Santiago, Yago De Moura1.8
Di Berardino,D2448Alonso,L18531–0 A16Round 1: Di Berardino, Diego Rafael - Alonso, Leonardo Espinha1.9
Deus Filho,J1852Rodriguez Vila,A24470–1 D00Round 1: Deus Filho, Joaquim de - Rodriguez Vila, Andres1.10
Hernandez Guerrero,G2429Ferreira,A18481–0 C49Round 1: Hernandez Guerrero, Gilberto - Ferreira, Angelo Augusto Pacheco1.11
Ricci,L1840Do Valle Cardoso,L24140–1 D25Round 1: Ricci, Lucas Estremes - Do Valle Cardoso, Lucas1.12
Mekhitarian,K2564Amura,C21311–0 B30Round 2: Mekhitarian, Krikor Sevag - Amura, Claudia2.1
Alonso,R2130Fier,A25560–1 A20Round 2: Alonso, Raphael V. P. Patricio - Fier, Alexandr2.2
Holt,C2540Lima,K21181–0 E11Round 2: Holt, Conrad - Lima, Kleyton Alcantara2.3
Cueto,J2113Tristan,L2536½–½ C47Round 2: Cueto, Jonny - Tristan, Leonardo2.4
Quintiliano,R2511Chemin,V21121–0 D45Round 2: Quintiliano, Renato R. - Chemin, Vitorio2.5
Gauche,C2108Delgado Ramirez,N2489½–½ A23Round 2: Gauche, Charles - Delgado Ramirez, Neuris2.6
Santiago,Y2482Kayser,G21061–0 E20Round 2: Santiago, Yago De Moura - Kayser, Gustavo Warmling2.7
Mafra,K2077Di Berardino,D24480–1 B93Round 2: Mafra, Kaiser Luiz - Di Berardino, Diego Rafael2.8
Rodriguez Vila,A2447Pontes,L20611–0 D01Round 2: Rodriguez Vila, Andres - Pontes, Luiz Felizola Lima2.9
Silva,G2066Hernandez Guerrero,G2429½–½ B30Round 2: Silva, Guilherme Henrique De Mora - Hernandez Guerrero, Gilberto2.10
Do Valle Cardoso,L2414De Saboya E Silva,J20231–0 B48Round 2: Do Valle Cardoso, Lucas - De Saboya E Silva,Jose Frederico2.11
Cordeiro,M2056Movsziszian,K23820–1 B00Round 2: Cordeiro, Marco Aurelio Zaror - Movsziszian, Karen2.12
Piccoli,L2284Mekhitarian,K25641–0 B92Round 3: Piccoli, Lucas Fonseca - Mekhitarian, Krikor Sevag3.1
Fier,A2556Guimaraes,D22851–0 C55Round 3: Fier, Alexandr - Guimaraes, Diogo Duarte3.2
Silva,C2261Holt,C2540½–½ D13Round 3: Silva, Caio Henrique Angelico - Holt, Conrad3.3
Martins,V2257Quintiliano,R25110–1 A13Round 3: Martins, Vinicius Tine - Quintiliano, Renato R.3.4
Marra,E2211Santiago,Y2482½–½ C02Round 3: Marra, Eduardo da Costa - Santiago, Yago De Moura3.5
Di Berardino,D2448Rodrigues,E22731–0 B41Round 3: Di Berardino, Diego Rafael - Rodrigues, Edgar3.6
Tsuboi,E2199Rodriguez Vila,A24470–1 C78Round 3: Tsuboi, Edson Kenji - Rodriguez Vila, Andres3.7
Saiz Rodriguez,D2187Do Valle Cardoso,L24140–1 E04Round 3: Saiz Rodriguez, Daniel Evelio - Do Valle Cardoso, Lucas3.8
Movsziszian,K2382Silva,K2254½–½ A08Round 3: Movsziszian, Karen - Silva, Kaua Marques3.9
Silverio,V2162Filgueiras,N23700–1 B32Round 3: Silverio, Vitor Luis De Jesus - Filgueiras, Nathan Felipe3.10
Lage,P2160Strikovic,A23640–1 A88Round 3: Lage, Pedro Ferreira - Strikovic, Aleksa3.11
Soriano Quispe,I2361Rodi,L22211–0 A21Round 3: Soriano Quispe, Ivan Excender - Rodi, Luis Ernesto3.12
Melian,J2322Fier,A2562½–½ B22Round 4: Melian, Juan Sebastian - Fier, Alexandr4.1
Quintiliano,R2479Soriano Quispe,I2361½–½ D31Round 4: Quintiliano, Renato R. - Soriano Quispe, Ivan Excender4.2
De Siqueira,L2398Di Berardino,D2448½–½ C00Round 4: De Siqueira, Luigy Lira - Di Berardino, Diego Rafael4.3
Rodriguez Vila,A2447Perdomo,L23531–0 C50Round 4: Rodriguez Vila, Andres - Perdomo, Leandro4.4
Do Valle Cardoso,L2385Casalaspro,M2290½–½ E68Round 4: Do Valle Cardoso, Lucas - Casalaspro, Mathias Andre4.5
Filgueiras,N2379Piccoli,L22731–0 A50Round 4: Filgueiras, Nathan Felipe - Piccoli, Lucas Fonseca4.6
Strikovic,A2375Bueno,A21271–0 A13Round 4: Strikovic, Aleksa - Bueno, Alfeu Junior Varela4.7
Hoffman,A2339Mareco,S25720–1 A62Round 4: Hoffman, Alejandro - Mareco, Sandro4.8
Holt,C2540Pinero Rodriguez,C2290½–½ D85Round 4: Holt, Conrad - Pinero Rodriguez, Carlos Jose4.9
Silva,C2199Tristan,L2513½–½ A40Round 4: Silva, Caio Henrique Angelico - Tristan, Leonardo4.10
Lujan,C2250Delgado Ramirez,N24820–1 B92Round 4: Lujan, Carolina - Delgado Ramirez, Neuris4.11
Santiago,Y2482Viana Da Costa,F22281–0 D38Round 4: Santiago, Yago De Moura - Viana Da Costa, Fernando4.12
Filgueiras,N2379Rodriguez Vila,A2447½–½ B06Round 5: Filgueiras, Nathan Felipe - Rodriguez Vila, Andres5.1
Fier,A2562Strikovic,A2375½–½ A21Round 5: Fier, Alexandr - Strikovic, Aleksa5.2
Mareco,S2572Umetsubo,C23461–0 C42Round 5: Mareco, Sandro - Umetsubo, Cesar Hidemitsu5.3
Matsuura,E2377Quintiliano,R24790–1 E10Round 5: Matsuura, Everaldo - Quintiliano, Renato R.5.4
Delgado Ramirez,N2482Melian,J23221–0 C60Round 5: Delgado Ramirez, Neuris - Melian, Juan Sebastian5.5
Soriano Quispe,I2361Santiago,Y24820–1 A40Round 5: Soriano Quispe, Ivan Excender - Santiago, Yago De Moura5.6
Di Berardino,D2448Silva,K2297½–½ B30Round 5: Di Berardino, Diego Rafael - Silva, Kaua Marques5.7
Ticona Rocabado,L2374Do Valle Cardoso,L23850–1 D27Round 5: Ticona Rocabado, Licael Roderick - Do Valle Cardoso, Lucas5.8
Movsziszian,K2380De Siqueira,L23980–1 A00Round 5: Movsziszian, Karen - De Siqueira, Luigy Lira5.9
Casalaspro,M2290Holt,C25401–0 C11Round 5: Casalaspro, Mathias Andre - Holt, Conrad5.10
Silverio,V2058Mekhitarian,K25640–1 B69Round 5: Silverio, Vitor Luis De Jesus - Mekhitarian, Krikor Sevag5.11
Tristan,L2513Starke,B21531–0 D02Round 5: Tristan, Leonardo - Starke, Bruno Orlando5.12
Perdomo,L2353Pirola,C2132½–½ D55Round 5: Perdomo, Leandro - Pirola, Claudionor Alcides Lima5.13
Do Valle Cardoso,L2385Mareco,S2572½–½ C41Round 6: Do Valle Cardoso, Lucas - Mareco, Sandro6.1
Quintiliano,R2479Filgueiras,N2379½–½ D35Round 6: Quintiliano, Renato R. - Filgueiras, Nathan Felipe6.2
Strikovic,A2375Delgado Ramirez,N2482½–½ A21Round 6: Strikovic, Aleksa - Delgado Ramirez, Neuris6.3
Santiago,Y2482De Siqueira,L23981–0 D24Round 6: Santiago, Yago De Moura - De Siqueira, Luigy Lira6.4
Rodriguez Vila,A2447Casalaspro,M22901–0 A02Round 6: Rodriguez Vila, Andres - Casalaspro, Mathias Andre6.5
Mekhitarian,K2564Martins,V22101–0 C54Round 6: Mekhitarian, Krikor Sevag - Martins, Vinicius Tine6.6
Piccoli,L2273Fier,A25620–1 B84Round 6: Piccoli, Lucas Fonseca - Fier, Alexandr6.7
Rodrigues,E2285Tristan,L25131–0 D01Round 6: Rodrigues, Edgar - Tristan, Leonardo6.8
Aranha Filho,A2168Di Berardino,D24481–0 D85Round 6: Aranha Filho, Alvaro Z. - Di Berardino, Diego Rafael6.9
Ribeiro,M2306Saiz Rodriguez,D2187½–½ A37Round 6: Ribeiro, Matheus Mendes Domingues - Saiz Rodriguez, Daniel Evelio6.10
Silva,K2297Pinero Rodriguez,C22901–0 B72Round 6: Silva, Kaua Marques - Pinero Rodriguez, Carlos Jose6.11
Guimaraes,D2285Cordeiro,M20421–0 B04Round 6: Guimaraes, Diogo Duarte - Cordeiro, Marco Aurelio Zaror6.12
Alonso,R2130Movsziszian,K23800–1 A46Round 6: Alonso, Raphael V. P. Patricio - Movsziszian, Karen6.13
Rodriguez Vila,A2447Santiago,Y2482½–½ B38Round 7: Rodriguez Vila, Andres - Santiago, Yago De Moura7.1
Mareco,S2572Strikovic,A2375½–½ B00Round 7: Mareco, Sandro - Strikovic, Aleksa7.2
Filgueiras,N2379Mekhitarian,K25640–1 B90Round 7: Filgueiras, Nathan Felipe - Mekhitarian, Krikor Sevag7.3
Fier,A2562Rodrigues,E22851–0 B41Round 7: Fier, Alexandr - Rodrigues, Edgar7.4
Guimaraes,D2285Quintiliano,R24790–1 B90Round 7: Guimaraes, Diogo Duarte - Quintiliano, Renato R.7.5
Delgado Ramirez,N2482Silva,K2297½–½ B40Round 7: Delgado Ramirez, Neuris - Silva, Kaua Marques7.6
Aranha Filho,A2168Do Valle Cardoso,L23850–1 E15Round 7: Aranha Filho, Alvaro Z. - Do Valle Cardoso, Lucas7.7
Movsziszian,K2380Casalaspro,M22901–0 E68Round 7: Movsziszian, Karen - Casalaspro, Mathias Andre7.8
De Siqueira,L2398Matsuura,E23770–1 B30Round 7: De Siqueira, Luigy Lira - Matsuura, Everaldo7.9
Soriano Quispe,I2361Ribeiro,M23061–0 D32Round 7: Soriano Quispe, Ivan Excender - Ribeiro, Matheus Mendes Domingues7.10
Viana Da Costa,F2228Umetsubo,C2346½–½ D37Round 7: Viana Da Costa, Fernando - Umetsubo, Cesar Hidemitsu7.11
Ticona Rocabado,L2374Rodi,L22211–0 D11Round 7: Ticona Rocabado, Licael Roderick - Rodi, Luis Ernesto7.12
Saiz Rodriguez,D2187Melian,J23220–1 B40Round 7: Saiz Rodriguez, Daniel Evelio - Melian, Juan Sebastian7.13
Mekhitarian,K2564Santiago,Y24820–1 C11Round 8: Mekhitarian, Krikor Sevag - Santiago, Yago De Moura8.1
Do Valle Cardoso,L2385Fier,A25620–1 A04Round 8: Do Valle Cardoso, Lucas - Fier, Alexandr8.2
Quintiliano,R2479Rodriguez Vila,A2447½–½ A40Round 8: Quintiliano, Renato R. - Rodriguez Vila, Andres8.3
Silva,K2297Mareco,S2572½–½ B84Round 8: Silva, Kaua Marques - Mareco, Sandro8.4
Soriano Quispe,I2361Delgado Ramirez,N2482½–½ E44Round 8: Soriano Quispe, Ivan Excender - Delgado Ramirez, Neuris8.5
Melian,J2322Movsziszian,K23800–1 B00Round 8: Melian, Juan Sebastian - Movsziszian, Karen8.6
Matsuura,E2377Ticona Rocabado,L23740–1 E11Round 8: Matsuura, Everaldo - Ticona Rocabado, Licael Roderick8.7
Strikovic,A2375Perdomo,L23531–0 E93Round 8: Strikovic, Aleksa - Perdomo, Leandro8.8
Holt,C2540Guimaraes,D22851–0 D30Round 8: Holt, Conrad - Guimaraes, Diogo Duarte8.9
Piccoli,L2273Tristan,L25130–1 C47Round 8: Piccoli, Lucas Fonseca - Tristan, Leonardo8.10
Martins,V2210Di Berardino,D24480–1 A37Round 8: Martins, Vinicius Tine - Di Berardino, Diego Rafael8.11
Silverio,V2058Hernandez Guerrero,G2429½–½ B35Round 8: Silverio, Vitor Luis De Jesus - Hernandez Guerrero, Gilberto8.12
Rodrigues,E2285Filgueiras,N23791–0 D01Round 8: Rodrigues, Edgar - Filgueiras, Nathan Felipe8.13
Santiago,Y2482Fier,A25620–1 D86Round 9: Santiago, Yago De Moura - Fier, Alexandr9.1
Movsziszian,K2380Quintiliano,R24790–1 A05Round 9: Movsziszian, Karen - Quintiliano, Renato R.9.2
Rodriguez Vila,A2447Strikovic,A23750–1 D01Round 9: Rodriguez Vila, Andres - Strikovic, Aleksa9.3
Ticona Rocabado,L2374Mekhitarian,K25641–0 E10Round 9: Ticona Rocabado, Licael Roderick - Mekhitarian, Krikor Sevag9.4
Mareco,S2572Soriano Quispe,I23611–0 A13Round 9: Mareco, Sandro - Soriano Quispe, Ivan Excender9.5
Viana Da Costa,F2228Holt,C25400–1 A06Round 9: Viana Da Costa, Fernando - Holt, Conrad9.6
Tristan,L2513Do Valle Cardoso,L2385½–½ E44Round 9: Tristan, Leonardo - Do Valle Cardoso, Lucas9.7
Delgado Ramirez,N2482Rodrigues,E22851–0 B42Round 9: Delgado Ramirez, Neuris - Rodrigues, Edgar9.8
Di Berardino,D2448Umetsubo,C23461–0 B67Round 9: Di Berardino, Diego Rafael - Umetsubo, Cesar Hidemitsu9.9
Perdomo,L2353Silva,K2297½–½ D36Round 9: Perdomo, Leandro - Silva, Kaua Marques9.10
Hernandez Guerrero,G2429Casalaspro,M2290½–½ C77Round 9: Hernandez Guerrero, Gilberto - Casalaspro, Mathias Andre9.11
Saiz Rodriguez,D2187Matsuura,E2377½–½ A16Round 9: Saiz Rodriguez, Daniel Evelio - Matsuura, Everaldo9.12
Da Silva Borges,R2169Melian,J23220–1 B47Round 9: Da Silva Borges, Rodrigo - Melian, Juan Sebastian9.13

In this insightful video course, Grandmaster David Navara shares practical advice on when to calculate deeply in a position — and just as importantly, when not to.
In this insightful video course, Grandmaster David Navara shares practical advice on when to calculate deeply in a position — and just as importantly, when not to.
Free sample video: Introduction
Free sample video: Invisible moves



Pablo Alejandro Acosta, maestro nacional, entrenador de ajedrez y periodista, argentino, radicado en Curitiba, Brasil.
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