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Series of the way to wait for 7 pairs.
How about red Dora??
If you win by red dora, the score is double.
The principle is to focus the score
But this case is an exception.
As you can see, waiting for 5p is too bad a winning ratio.
Expected value is less than half of honor tile waiting.
If there are both 2p and 8p, you can wait 5p.
The winning ratio is not so huge difference, so expected value is better than honor tile.
It can't be one or the other. It needs both of them definitely.
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