[SG_Mahjong] 3 Player- 1 Full Round(#2) 04.03.2022

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TIKTOK:SG_Mahjong
Rules:
5/1 Half
Zimo +3
Shooter
Bite own flower
NO 7 对子
4 Flower and Bei Is everyone’s Tai
Minimum 2 Tai

[@juniorco3109]

I have questions.... Looks like there are two walls of 19 (ours and player right) and one wall of 18 (Player across), @ :38 player on right as 19 stacks but takes one stack and puts on end of wall of player across. Why?