moistfinger: Your idea is correct. I HAVE doubled from the bar before, not often, but not never either. It is a good play in some situations. I wouldn't want this option to be taken away...
Note that if you CANNOT double (because the opponent has the cube, or it's post-crawford), it DOES Autopass. So it is not an be-lazy-and-save-some-code-problem, in the contrary, it is doing it even more detailed and correct.
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