9 7 3 ▁by ▁F EN A MA C ▁( ), ▁the ▁Mexican ▁ch ess ▁feder ation . ▁Kn own ▁since ▁ 1 9 9 7 ▁as ▁the ▁National ▁Ab solute ▁Championship ▁( Cam pe onato ▁Nacional ▁Ab sol uto ) ▁and ▁previously ▁as ▁the ▁National ▁Cl osed ▁Championship ▁( Cam pe onato ▁Nacional ▁C err ado ), ▁it ▁was ▁initially ▁organized ▁as ▁a ▁round - ro bin ▁tournament . ▁However , ▁several ▁ed itions ▁in ▁the ▁ 1 9 9 0 s ▁were ▁organized ▁as ▁a ▁series ▁of ▁elim ination ▁matches , ▁and ▁the ▁championship ▁is ▁currently ▁run ▁as ▁a ▁Swiss - system ▁tournament . ▁In ▁some ▁years ▁it ▁serves ▁as ▁a ▁qual ifying ▁stage ▁for ▁the ▁F IDE ▁World ▁Ch ess ▁Championship ▁and ▁is ▁designated ▁as ▁sub - Z onal ▁tournament ▁ 2 . 3 . 1 ▁in ▁such ▁cases . ▁A ▁different ▁tournament ▁is ▁the ▁Mexican ▁Open ▁Championship ▁( Cam pe onato ▁Nacional ▁Ab ierto ), ▁which ▁is ▁not ▁limited ▁to ▁Mexican ▁national s ▁and ▁has ▁been ▁held ▁ann ually ▁since ▁ 1 9 5 4 . ▁ ▁List ▁of ▁w inners ▁ ▁{ | ▁class =" sort able ▁w ik itable " ▁! ▁Year ▁!! ▁Place ▁!! ▁W inner ▁! Not es ▁and ▁references ▁| - ▁| ▁ 1 9 7 3 ▁▁▁ ▁|| ▁Mexico ▁City ▁|| ▁Mario ▁Cam pos ▁López ▁| ▁| - ▁| ▁ 1 9 7 4 ▁▁▁ ▁|| Gu an aju ato || M ario ▁Cam pos ▁López ▁| ▁| - ▁| ▁ 1 9