Talk:Kiara Matching Game/@comment-6624314-20130603033538/@comment-214.37.45.6-20130604171425

My logic was incorrect when I agreed with you that 13 days was the maximum. It is not. The maximum is actually 19 days.

It can take a maximum of 4 turns to complete a sheet. This is how:

There are 4 items {a, b, c, d}.

Day 1: A then B

Day 2: C then B

At this point, we know where both B's are, however, we haven't a clue where either D is, and there are 4 unflipped cards.

If, on day 3, the first card I flip is D, I'd have a 1/3 chance of finding the other D. If i miss, I will then have taken the maximum of 4 flips to complete the sheet.

4 + 3 + 3 + 3 + 3 + 3 = 19 days

It's unlikely, but I'm a pretty unlucky guy, I will probably do it.