XYZ-Wing Error
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#276 XYZ-Wing Error
I believe I have found a XYZ-Wing error - All the explanations of the routine I have found state there has to be two Bi-Value wing cells and a pivot cell with 3 candidates and only one candidate in all three cells. See the attachment below - surely this is not a true XYZ-Wing.
Hmm.. I couldn't find an XYZ-Wing suggested anywhere in this puzzle. Apart from an X-Chain eliminating 8 from r3c5, this is the same puzzle:
Btw, I'm using a version produced on GitHub - https://github.com/1to9only/HoDoKu/releases/tag/2.2.4
I don't recall any issues with XYZ-Wings being addressed there. It is possible tho, seeing the program has appeared in a number of manifestations there.
P.S. Exactly the same result, for me, in v2.2.0 exe.
Library format, copy and paste into puzzle:
:0901:8:.+2+1+6+4...+9+4..2+9+5.+61.69..+1+24.3+9+57.+6+4.+22+1+4+9..6..+68+7+4.+2.9.+9+5+6.+24...1+42+5..+9.+6...+1695+2+4:327 835 839 358 359 365 377 386 788:818::
Last edit: CCV 2022-06-20
There is a valid XYZ-Wing in there, but only after a series of previous steps are completed.
Thanks for the info - I was playing with AIC and a few other solving techniques turned off.
Regards,
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From: bugs-and-feature-requests@hodoku.p.re.sourceforge.net bugs-and-feature-requests@hodoku.p.re.sourceforge.net on behalf of CCV ccvsf@users.sourceforge.net
Sent: 20 June 2022 04:32
To: [hodoku:bugs-and-feature-requests] 276@bugs-and-feature-requests.hodoku.p.re.sourceforge.net
Subject: [hodoku:bugs-and-feature-requests] #276 XYZ-Wing Error
There is a valid XYZ-Wing in there, but only after a series of previous steps are completed.
Attachments:
[bugs-and-feature-requests:#276]https://sourceforge.net/p/hodoku/bugs-and-feature-requests/276/ XYZ-Wing Error
Status: open
Group: V2.3
Created: Thu Jun 02, 2022 09:56 PM UTC by David King
Last Updated: Mon Jun 20, 2022 12:59 AM UTC
Owner: nobody
Attachments:
I believe I have found a XYZ-Wing error - All the explanations of the routine I have found state there has to be two Bi-Value wing cells and a pivot cell with 3 candidates and only one candidate in all three cells. See the attachment below - surely this is not a true XYZ-Wing.
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Bugs and Feature Requests: #276