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Follow these steps to determine the points awarded to a hand: 1. For a CLOSED hand RON (out off a player), begin with 30 points. 2. For any TSUMO (out off the wall) or OPEN hand, begin with 20 points. 1. For each CLOSED SET of Simples (Suit tiles 2-8), add 4 points (2 points if OPEN). 2. For each CLOSED SET of Ends (1, 9, Honors), add 8 points (4 points if OPEN). 3. For each CLOSED KAN of Simples, add 16 points (8 if OPEN). 4. For each CLOSED KAN of Ends, add 32 points (16 if OPEN). 1. For each Edge, Closed, or Single Wait, add 2 points. 2. For an Open Wait add 0. 3. For a Double Set Wait, add 0. However, score the Set completed last as CLOSED if Tsumo, and OPEN if Ron. 1. For Tsumo, add 2 points (except when combined with Flat or Out on Extra Tile). 2. For a head of a value honor (Red, East for Dealer, etc.), add 2 points. After calculating points, always round up to the next 10. Thus, 32 becomes 40. 1. When Flat Hand is combined with Closed Tsumo, the 2 points normally counted for Tsumo goes to 0. As a result, when Flat Hand and Closed Tsumo are combined, the total points are by definition 20. 2. When a hand is Open, has all Runs, and finishes Ron on an Open Wait, the total points are 30. |
Example:
  
       
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Ron |
| This hand is Inside Only. One would expect it to be 20 points (it is open, has no sets, finished with an open wait, has no points for the head, and has no points for tsumo). However, as an exception, this configuration is counted at 30 points. The only time that 20 points is possible is when Flat Hand and Tsumo are combined. |
