Gilberto Hernández Guerrero (born February 4, 1970 in Ebano, San Luis Potosí ) is a chess Grandmaster from Mexico. On the July 2008 FIDE rating list he has an Elo rating of 2550, making him the highest ranked player on the Mexican ELO-list. He was the highest ranked Mexican player in the 1990s and 2000s.
At age 5, Hernández learns the basics of chess. At age 8, he played his first tournament. As an 11-year-old he became champion of his state and also took the bronze medal in the World Under 12 Championship held in Xalapa . In spite of the absence of a trainer, he became National Master at 14 and FIDE Master at 16 after winning the gold medal at the Pan-American Under-16 Championship in Puerto Rico .
As a 17-year-old he participated in a Zonal tournament held in Cuba , where he got his first international master . After that success he was invited to play in five more tournaments, so he stayed on the island for three months, which helped him to develop further. He also returned to Cuba at the time of his last IM norm. He got it with a gap of 1.5 points. By that time, he had a rating of 2520.
In 1990, Hernández played in the Open tournament in Lyon , France. He scored 8 out of 9 points beating well-known grandmasters like forming World Junior Champion Vladimir Akopian and Artashes Minasian to become champion of the tournament. Grandmaster title in 1995. 
Gilberto Hernández has played 7 Olympiads and with more than 10 years living out of his country, he has won more than 40 international tournaments.
His MOST significant results contre elite chess players include His Triumphs over Alexei Shirov , Vladimir Akopian , Boris Gulko , Tony Miles and Alexander Rustemov and his draws with Alexander Khalifman , Viktor Korchnoi , Judit Polgár , Boris Gelfand , Joël Lautier , Jeroen Piket , Among Others .
He is married to Claudia Amura , a Woman Chess Grandmaster from Argentina.
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