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ID94-Earthly Hand
Question: What is an “Earthly Hand”?
Answer: When East player (the only player with 14 tiles) has Mah Jongg after the Charleston, it is called an “Earthly Hand.” If this occurs, it is considered a self-picked Mah Jongg and the winner is paid double by all players. Also see ID102.
Source: Mah Jongg Made Easy 2020, page 14