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Consecutive Run Hands Can Not Start at Zero (Article ID 23)
Abstract: Zeros are not allowed in consecutive run hands as the runs must start with a one or higher.
Question from a player: Can I use a “0” in a consecutive run?
Answer from the NMJL: “A zero may never be used in a consecutive run.”
Source: Mah Jongg Made Easy (2020 page 30); National Mah Jongg League Bulletin Q&A (2018) https://www.nationalmahjonggleague.org