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==Formation== | ==Formation== | ||
[[Image:Real suuankou.jpg|thumb|right|250px|Suuankou tsumo on 9-sou.]] | |||
All four of the triplets must be concealed for this hand to be counted as a yakuman. [[Naki|Tile calls]] of [[kan|closed kans]] are acceptable, as the closed kan also counts as a closed triplet. The difficulty of this yakuman stems from the need to draw at least 3 out of 4 of a single tile type, for four different tile types. [[Naki|Discard calling]] to attain tiles immediately removes any chance of forming this yakuman. | All four of the triplets must be concealed for this hand to be counted as a yakuman. [[Naki|Tile calls]] of [[kan|closed kans]] are acceptable, as the closed kan also counts as a closed triplet. The difficulty of this yakuman stems from the need to draw at least 3 out of 4 of a single tile type, for four different tile types. [[Naki|Discard calling]] to attain tiles immediately removes any chance of forming this yakuman. | ||