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Feedback and Questions

I've received a lot of interesting comments and questions from Sudoku fans over the last few years and this page is where I try to answer them. I'm also directing Str8ts feedback here. Please feel free to drop me a note on the side of the page. Or you can email me directly at .


Post a Comment or Question here...
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Any Sudoku you want to publish here for easy loading into the solver - 81 characters, use '.' or '0' for unknowns.

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If you are writing to alert me of a problem (thank-you!) please include a url to the page in question.
Can get fixes in quicker if I know immediately where to go.
Many thanks to all the people who have helped improve the solvers and strategies with their feedback!

Tuesday 14-Jan-2025

... by: Sagan, US

The latest glitch I have found is the Arto Inklo Escargot puzzle. It's wrong. It has an extra given digit that doesn't belong there. This would affect solve time, your difficulty calculations, etc., etc.

Andrew Stuart writes:
Seems like I got the puzzle definition from a forum post in 2012 on the most popular Sudoku forum at the time. This included the extra 1 in H3. I don't think it seriously affects the grade or solution path since 1 in H3 solves trivially with a hidden single. But I appreciate the correction and yes embarrassing to have had the extra digit so many years. Refresh the Sudoku.htm and the corrected Escargot will load. Also, I see I did make this correction in the past but not in all places. Will try and find them all.

Saturday 11-Jan-2025

... by: Tim, USA

Hello, Could you please clarify what you recently added for UR3b? Nothing was labeled with a date.
Thanks,
Tim

Andrew Stuart writes:
Yes sure. the second example of UR3B where the text starts “Here is a triple with a slightly different pattern, also from David Hollenberg...”
And the second example of Type 5
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Thank-you everyone for all your questions and contributions.