Talk:Hitori

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[edit] Missing rule

Is there some rule that I'm not aware of? For example, take the following puzzle (yoinked from http://www.mathsnet.net/puzzles/hitori/index.html):

4	4	4	3
1	3	4	2
3	1	1	1
1	2	3	1

When I tell the applet to check, it indicates there a mistake in the solution. Based on the rules on the article alone, it looks perfect. --Sigma 7 04:00, 26 May 2007 (UTC)

Have you rechecked row 3 against "there are no duplicate numbers in any row or column"? —C.Fred (talk) 04:06, 26 May 2007 (UTC)

Okay, now I see the problem. I was thinking that the black cells seperated each row/column. --Sigma 7 04:08, 26 May 2007 (UTC)

[edit] Complexity

Does anybody know if Hitori is NP-complete? If so, is there some article on the web that we could link to from this page? 68.150.245.6 15:09, 27 July 2007 (UTC)

[edit] Multiple solutions?

The article doesn't say whether a (properly formulated) Hitori can have multiple solutions. I assume it can't, but this should probably be said explicitly one way or the other. —Ruakh_TALK 01:52, 22 March 2008 (UTC)