If the winner completes an x-point hand on a self-draw, he receives (8+ x) points from each of the other three players.The winner of a hand receives points from the other 3 players as follows:.Any player can declare a winning hand only if he has 8 or more points with his hand's completion. Points called 'fan' (番) are given according to factors such as the tiles a player has or how complete a player's hand is.Thus one match consists of exactly 16 hands.

There are exactly 4 hands for each prevalent wind, because the seat wind always changes after each round of 4 hands.

The game play is otherwise quite similar to Old Hong Kong Mahjong. In effect, it mixes the scoring rules of several different mahjong variations. It is characterised by dozens of possible combinations and a rather complex and inventive set of patterns. Many tournaments have adopted this standard and some mahjong societies exclusively use this scoring system for all play. Mahjong Competition Rules (MCR), also known as Competition Mahjong and Guóbiāo Májiàng ( simplified Chinese: 国标麻将, National Standard Mahjong), is an international standard of rules and scoring criteria for mahjong founded by the All-China Sports Federation in July 1998 and supported by some mahjong societies, mostly in Asia. Standard of the All-China Sports Federation

Microsoft mahjong scoring rules