Playing one particular game may help prevent dementia and relieve depression symptoms , a new study has found. Mahjong is a tile-based game that was developed in China in the 19th century and is popular throughout Asian countries. It is played by four people and usually involves 136 to 152 tiles which players have to take turns in drawing and discarding until one of them claims victory by presenting a certain set of combinations. Research found that from 2002 to 2018, almost a quarter of the