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ID192-Scoring for Player who Gives Another Player Mah Jongg
Question: If I give another player Mah Jongg, am I penalized?
Answer: Yes, you would pay the winner double the value as shown on the card. If the hand is valued at .25, you would pay .50 while all the other players would pay, .25.
Source: Mah Jongg Made Easy 2024, page 25, Standard Scoring