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Longest marathon playing Mahjong

Longest marathon playing Mahjong
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Who
Oleg Petrov, Anton Khantimirov, Mark Efremov , Nickolay Demyanov
What
33/3/48.58 hour(s):minute(s):second(s)
Where
Russian Federation (Krasnoyarsk,)
When
16 December 2012
Age Restriction: Applications for this record title will only be accepted if the applicant is 16 years of age or over.
The longest marathon playing Mahjong is 33 hr 3 min 48.58 sec and was achieved by Oleg Petrov, Anton Khantimirov, Mark Efremov and Nickolay Demyanov (all Russia) in the exhibition center "Sibir" in Krasnoyarsk, Russia, on 14-16 December 2012.