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I thought the article was saying Alice must get a head followed immediately by a tail. If that's not the case, then it makes total sense, but it would seem the

I thought the article was saying Alice must get a head followed immediately by a tail. If that's not the case, then it makes total sense, but it would seem the article is a bit vague about that. Actually, the details in the article say: >even though head-tail and head-head have an equal chance of appearing after two coin tosses. That implies that the tail is expected immediately after the head for Alice's goal.

thefreeman 11y ago
Correct, but the point is if Alice doesn't get a tail, that means she got a head, so she is still in the same position as she was before the flip, only needing a single tail to complete the sequence. If Bob gets a head, then a tail, he now needs two consecutive heads to complete his sequence.
frobozz 11y ago
The only way she can get a tail which isn't immediately after a head is to never get a head in the first place.