Editing Robot-sumo (section)

=== Brazil ===
Widely known for [[robot combat]] competitions, robot-sumo was introduced in [[Brazil]] by RoboCore in 2008 <ref name=":19" /> and has attained increasing attention in the country from 2017 onwards, mainly from teams from the top [[Universities and higher education in Brazil|universities]] of the country. Robot-Sumo has been added to the main robotics competitions contested by teams of engineering and technology students from institutes at [[Education in Brazil#Technical education (ensino t%C3%A9cnico)|Technical]] and mainly at [[Higher education Brazil|Higher Education]] levels.<ref>{{Cite web |title=Combate de Robôs no Brasil {{!}} RoboCore |url=https://www.combatederobos.com.br/en |access-date=2025-03-14 |website=combatederobos |language=en}}</ref> Since these teams are mostly students organizations/clubs or research groups, the rotation of members tend to be high, since every year new freshmen get into the school/university, and senior members tend to leave the group after graduation. These teams usually have a [[professor]] from the institute as an advisor, who may contribute for the robots development directly, or be just an representative for internal bureaucracy.

The robotics teams from the [[Polytechnic School of the University of São Paulo|Polytechnic School of the]] [[University of São Paulo]] ([[Polytechnic School of the University of São Paulo|Poli-USP]]), with their team named "ThundeRatz" <small>[<nowiki/>[[:pt:ThundeRatz|pt]]]</small>,  [[Instituto Mauá de Tecnologia]], with their team named "Kimauánisso", and [[Federal University of Rio de Janeiro]] (UFRJ), with their team named "Minervabots", are among the most prominent and successfull robot-sumo teams in the country.<ref>{{Cite web |title=ThundeRatz participa do Mundial de Robótica no Japão – ESCOLA POLITÉCNICA |url=https://www.poli.usp.br/noticias/2675-thunderatz-participa-do-mundial-de-robotica-no-japao.html |access-date=2025-01-19 |language=pt-BR}}</ref><ref>{{Cite web |title=Instagram - É HOJE! Finalmente chegamos ao Japão para competir na @alljapanrobotsumo !! |url=https://www.instagram.com/p/DDPfCvzuYFL/ |access-date=2025-01-19 |website=www.instagram.com}}</ref>[[File:Stonehenge-ThundeRatz.jpg|thumb|Stonehenge, former Mega Sumo RC developed by ThundeRatz <small>[<nowiki/>[[:pt:ThundeRatz|pt]]<nowiki>]</nowiki></small>.<ref name=":9" /><ref name=":14">{{Cite web |title=Stonehenge Robot - ThundeRatz Team » JSumo |url=https://blog.jsumo.com/thunderatz-team-stonehenge-sumo-robot/ |access-date=2025-01-03 |website=blog.jsumo.com}}</ref> Though untypical worldwide, its design was heavily copied by rival teams in Brazil during its active years (2012-2020). As of the IRONCup 2025, it was still the biggest [[:pt:Resultados_das_Competições_de_Sumô_de_Robôs_da_RoboCore|Sumo 3kg RC RoboCore champion]] and the leader of the History Ranking.<ref name=":262">{{cite web|access-date=2025-02-25 |title=Robot Ranking |url=https://rank.robocore.net/sumo-3kg-rc |website=rank.robocore.net}}<!-- auto-translated from Portuguese by Module:CS1 translator --></ref> ]]These competitions are also open to teams not directly linked with academic institutions, including independent teams of [[Hobby#Hobbyists|hobbyists]], graduated engineers and professionals. These teams are often made up of former students from those academic institutions teams.<ref>{{Cite web |title=Time Raijū de Robótica |url=https://www.instagram.com/raiju.team/ |access-date=2025-01-21 |website=www.instagram.com}}</ref><ref>{{Cite web |title=Equipe Paralela |url=https://www.instagram.com/equipeparalela/ |access-date=2025-01-21 |website=www.instagram.com}}</ref>

Furthermore, international participants, from countries such as [[Ecuador]], [[France]], [[Mexico]], [[Paraguay]] and [[Poland]], have already participated.<ref name=":3" /> Participants from Mexico, one of the robot-sumo world powerhouses, have achieved great success in competitions in Brazil, mainly in Mini Sumo.

==== RoboCore ====
RoboCore is an online store, developer and manufacturer of boards and kits in Brazil and an organizer of robotics events.<ref>{{Cite web |last=RoboCore |title=RoboCore // A loja virtual do maker brasileiro |url=https://www.robocore.net/quem_somos |access-date=2025-01-01 |website=RoboCore |language=pt-BR}}</ref> RoboCore organizes and supports a number of robotics competitions in Brazil, including in its program [[Robot combat|Robot Combat]], Line Follower, Robot Trekking and Robot-Sumo events, attracting mainly universitarian and technical education level teams.<ref name=":3" /> The current major RoboCore robotics competition in general is the RoboCore Experience (RCX, and former Winter/Summer Challenge), the largest [[robot combat]] competition in [[Latin America]], currently held with [[Campus Party]] Brasil.<ref name=":2" /> 

Currently, the annual calendar competitions from RoboCore with robot-sumo added to their program are the following:<ref name=":3" />

* '''RoboCore Experience (RCX)''': organized by RoboCore, currently held with [[Campus Party]] Brasil. It is usually held at the [[São Paulo]] - [[São Paulo (state)|SP]] edition, which is usually held in July, but it may be hosted in other editions.
* '''IRONCup''': organized by [[Inatel]] and sanctioned by RoboCore, held at [[Santa Rita do Sapucaí]] - [[Minas Gerais|MG]], usually around February/March.
* '''RSM Challenge''': organized by Instituto RSM and sanctioned by RoboCore, held at [[Mogi das Cruzes]] - [[São Paulo (state)|SP]], in the [[Greater São Paulo]], usually around April/May.
* '''RoboChallenge Brasil''': organized by [[Instituto Mauá de Tecnologia]] and sanctioned by RoboCore, held at [[São Caetano do Sul]] - [[São Paulo (state)|SP]], in the [[Greater São Paulo]], usually in October.

The robot-sumo competitions organized or supported by RoboCore are among the most prestigious in the country. RoboCore Experience is the major robotics event in Brazil and considered by many as the brazilian robotics "National Championship". However, the IRONCup, the RSM Challenge and the RoboChallenge Brasil have also become prominent competitions due to their relevance to the brazilian robot-sumo scenario. The RSM has also become prominent as a major international tournament, gathering robots from [[Latin America]] countries, such as [[Mexico]], [[Ecuador]], [[Colombia]] and so on.<ref name=":3" /> Besides these events, some special and once a time competitions might be organized as well.

The classes usually included in RoboCore tournaments program are Sumo 3kg (Mega Sumo) Auto and RC, Mini Sumo Auto and RC and LEGO Sumo. In addition, there is usually a separate LEGO Sumo class exclusively for teams formed by [[Education in Brazil#Elementary school (ensino fundamental)|elementary]] and [[Education in Brazil#High school (ensino m%C3%A9dio)|high school]] students, the LEGO Sumo Junior.<ref name=":3" />
[[File:SumôRobô-ThundeRatz.jpg|thumb|330x330px|Mega Sumo (Sumo 3kg) match between [[Polytechnic School of the University of São Paulo|Poli-USP]] (in the left) and [[Federal Center for Technological Education of Minas Gerais|CEFET-MG]] (in the right) at the RoboCore Winter Challenge 2017.|left]]
RoboCore tournaments usually adopt the [[Double-elimination tournament|double-elimination knockout system]], in which there is a main bracket (called the "winners' bracket") and a secondary bracket of robots transferred after losing a match in the main bracket (called the "losers' bracket"). Robots that lose in the losers bracket are eliminated from the tournament. The tournament final consists of the winner of the winners' bracket competing against the remaining robot from the losers' bracket. Robot-sumo tournaments from RoboCore usually adopt a "double final" format, in which the robot coming from the losers' bracket must win two matches of the final to become the tournament champion, while the robot coming from the winners' bracket must win only one match. This is due to the principle that for a robot to be eliminated, it must suffer two defeats in the event. 

RoboCore calendar robot-sumo events (RCX, IRONCup, RSM Challenge and Robochallenge) have been usually approved by FUJISOFT as "Overseas Tournaments" qualifiers for the [[Robot-sumo#All Japan Robot-Sumo Tournament|All Japan Robot Sumo Tournament]] <small>[<nowiki/>[[:ja:全日本ロボット相撲大会|jp]]]</small> in the Mega Sumo and Mini Sumo classes.<ref name=":8" /> Thus, these competitions are the main qualification path for teams based in Brazil.

RoboCore also organizes the "RoboCore's Robot History Ranking", a historical ranking of registered and participant robots in RoboCore tournaments, including those in the robot-sumo classes. The system is based on the [[Elo rating system|Elo system]] that calculates the relative strength between opponents based on the result of each confrontation. The RoboCore system adopts an initial score of 1200,<ref>{{cite web|access-date=2025-02-25 |title=Robot Ranking |url=https://rank.robocore.net/about |website=rank.robocore.net}}<!-- auto-translated from Portuguese by Module:CS1 translator --></ref> but does not exclude inactive robots from the ranking. Since the system is tied to a registered robot, then the ranking is compiled exclusively for each instance registered in the system (this means if a robot is registered with different labels for different tournaments, the ranking will be compiled for each label, as different robots). For robot-sumo, the RoboCore ranking is compiled for the major classes in Brazil: Sumo 3kg Auto, 3kg RC, Mini Auto, Mini RC, LEGO and LEGO Jr., but also for minor classes, such as the remote classes, popular during the [[COVID-19 pandemic]].

==== Other tournaments in Brazil ====
Though RoboCore organizes and sanctions a number of events, most of them are hosted in the [[Southeast Region, Brazil|Southeast]] region of Brazil, mainly in the [[São Paulo (state)|São Paulo state]]. Different academic institutions have also been organizing regional tournaments, mainly in the [[Northeast Region, Brazil|Northeast]] and [[South Region, Brazil|South]] regions of Brazil.

From 2017 until 2021, [[Instituto Mauá de Tecnologia|Instituto Mauá]] also organized additional tournaments in São Paulo state in partnership with [[:pt:Serviço_Social_do_Comércio|SESC]], from [[Santo André, São Paulo|Santo André]] in the [[Greater São Paulo]], and with [[Bosch (company)|Bosch]] Brazil in [[Campinas]] - [[São Paulo (state)|SP]]. These tournaments were also added as Overseas Tournament qualifiers for the All Japan Robot-Sumo Tournament.