The World Series Of Mahjong (Chinese:世界麻将大赛) is a privately sponsored Mahjong tournament. Both men and women are eligible to contest this title, and the top finishers receive prize money with the champion also receiving a necklace. The tournament system competition takes place over a few days. Contestants must pay an entry fee and must provide proof that they are at least the age of 21.
The World Series Of Mahjong (WSOM) was established by World Mahjong Ltd.(WML) in 2007. Chunglai Hui, a designer from Hong Kong, won the first tournament. Following tournaments were held in 2008, 2010, and 2015.
The rules for the tournament were developed by Alan Kwan as a slight modification of his Zung Jung (中庸) pattern-based scoring system. The tournament uses sets of 136 tiles, excluding the bonus flower tiles, and pairs of dice. Prevailing wind is not recognized.
|June 15–18, 2007||2007 World Series Of Mahjong||Rua Cidade de Sintra, Nape, Macau||Wynn Macau|
|September 18–21, 2008||2008 World Series Of Mahjong||Rua Cidade de Sintra, Nape, Macau||Wynn Macau|
|August 19–22, 2010||2010 World Series Of Mahjong||Cotai Strip, Cotai, Macau||Venetian Macao-Resort-Hotel|
|December 5-6, 2015||2015 World Series of Mahjong||Cotai Strip, Cotai, Macau||Venetian Macao-Resort-Hotel|