[1] In 1998 Ramírez won the Under 10 division of the Pan American Youth Chess Festival, held in Florianópolis, Brazil,[3][4] and this achievement earned him the title of FIDE Master.

[citation needed] In 2002, he played for the Costa Rican team on board three at the 35th Chess Olympiad, held in Bled, Slovenia, scoring 9/14 points; he drew with Russian Grandmaster Alexander Morozevich among others.

This result earned Ramírez a spot in the FIDE World Chess Championship 2004, where he was eliminated in the first round by the eventual winner, Rustam Kasimdzhanov.

[citation needed] Ramírez achieved his third norm at the age of 15 by scoring 7½/10 in the Los Inmortales Tournament in Santo Domingo, Dominican Republic, in November 2003.

[14] In October 2020, Ramírez was pulled off the broadcast for the U.S. junior girls championship after a complaint by WGM Jennifer Shahade to the Saint Louis Chess Club about two past incidents in which he allegedly sexually assaulted her after she was paired with him as commentators.

[19] Ramírez graduated from the University of Texas at Dallas as a Eugene McDermott Scholar with a master's degree in arts and technology, video game design.

[20] In a tweet published on February 16, 2023, WGM Jennifer Shahade accused Ramirez of sexually assaulting her twice and said that she had seen "alarming evidence" from other women.

[23] The following day, The Wall Street Journal published an article, based on interviews with eight women, who said that Ramírez had used his position in the chess community to make multiple unwelcome sexual advances towards them since at least 2011.