8 and 9 need a 7
8 and 9 become a Run with a 7, or with a Joker standing in for it.
8 and 9 become a Run with a 7, or with a Joker standing in for it.
8 and 9 become a Run with a 7, or with a Joker standing in for it.
Takeaway: 8 and 9 finish with a 7, or a Joker.
In Mahjong Island, 8 and 9 Dots become a Run only with a 7, or a Joker standing in for it.
There's no 10, so among real tiles, only the 7 Dots fits.
Edge pairs like this finish just one way, so they're the first to break up when you need a discard.
Next lesson: Fill the gap
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