Jaime Álvarez Mendoza (September 29, 1948) is a Mexican professional wrestler, or luchador, who is best known for working under the ring name Jaque Mate (Spanish for Checkmate) in Consejo Mundial de Lucha Libre (CMLL). Àlvarez worked under the ring name El Enfermero, Jr. (the Nurse, Junior) for 13 years and has also worked as Skorvikan. As Jaque Mate, Álvarez is most known for being a founding member of the wrestling trio Los Intocables (the untouchables) along with Pierroth, Jr. and Masakre. Los Intocables held the CMLL World Trios Championship once, winning the title from and losing the title to Los Infernales (MS-1, El Satánico and Pirata Morgan. He also held the NWA World Light Heavyweight Championship for almost 20 months from March 25, 1993 until December 4, 1994. Álvarez wrestling s