Solver App for Android
Strategies for Popular Number Puzzles
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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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Many thanks to all the people who have helped improve the solvers and strategies with their feedback!

Monday 16-Jan-2023

... by: Terje, Norway

Reported a bug on sheet. Seems to work normal again. Love this sheet and have used it for years loading hard puzzles and doing step 1 and 2 before printing.

Andrew Stuart writes:

No clear what page you are referring to. I was just now fixing something on the sudoku player which might have broken it for 10 minutes. Also - please send email so I can respond directly

Friday 13-Jan-2023

... by: Rex Welsh, Ontario, Canada

Load Sudoku:

Hello Andrew

I want to thank you for all the work you did in building this site.

I wanted to mention that the box that changes with the steps that explains why some choices were made does not advance to the next explanation. I had hoped that others would have mentioned this to you.

On another topic, I saved the string :

It does not matter what it actually is but I found no way to plug this in so that I could try the puzzle another time. I do see one above but that goes to you and not the main panel.

Thank you again for all the work you have done to help me learn more about this game.

Rex (It's my real name)

Andrew Stuart writes:

To create a perma-link to a puzzle use the "Email This Board" button, creates this link (from your definition):

If you mean the blue results box below the solver board then yes it only updates when there is something returned to the solver. So steps that merely clear off candidates or set solved cells don’t generate text to put in that box. I guess it's a minor thing but sometimes I think its better to keep it since people may move forward but still want to refer back to the text.

Thursday 12-Jan-2023

... by: Bill Campbell, Williamsburg, Virginia 23188 United States of America

How can I simply move a Sudoku puzzle from Daily to Sudoku Solver without losing my entries?

Andrew Stuart writes:

Hi Bill. The Daily Sudoku has a button "+ Solved Cells" which will transfer your progress. However it doesn't make sense to transfer the candidates you entered. The solver needs all the candidates logically available so it will override your fewer entries.

Thursday 12-Jan-2023

... by: Barbara, Germany

Dear Andrew Stuart,
Since years I loved to play str8ts nearly every day. But now the keyboard covers the riddle while writing and I had to scroll up and down all the time. And so I have no clear view. It's an Android mobile phone.
Can you help me? I would be sad If I could not solve your str8ts any more.

Andrew Stuart writes:

Not good, love to fix.
To anyone with similar issues - please send me a screen shot? with the keyboard showing would be great. So many devices and screens I'm mostly guessing how it looks for most people despite having my own android phone. I added a checkbox on the player "Numeric keypad". Does that help? Suspect it takes the same space
Thinking of adding my own keyboard popup

Thursday 5-Jan-2023

... by: John, Texas

Exact same problem as Kath, Canada, except I'm on an android device,

Also, until the recent changes i used to get a full keyboard to use in str8ts, which was useful for making corrections... now just get a minimal numeric keypad

Andrew Stuart writes:

Ok I'm going to put an option on the player
When I use Android with the default keyboard the numbers are not shown, you have to SHIFT to see them

Thursday 5-Jan-2023

... by: Harry, Niederland

Fruher kamen die kleine ziffern auf ein linie.Die neu methode ist meer verwirrend Absolut klein verbesserung

Andrew Stuart writes:

Look for the "Notes 3x3" and untick

Tuesday 3-Jan-2023

... by: Kath, Canada

1 to 25 interface has been broken the past 2 days - it doesn't resolve into the usual format with all the puzzles on the left and the puzzle centred. The top of the page is cluttered with all the usual left side information and puzzle 1 does not open fully/isnt accessible.

Andrew Stuart writes:

Does [CRTL]+[F5] fix it?
Something is not telling the browser to reload new scripts

Tuesday 3-Jan-2023

... by: John, Texas

On an android tablet, can I get the full keyboard back in Str8ts?

Andrew Stuart writes:

Ok I'm going to put an option on the player
When I use Android with the default keyboard the numbers are not shown, you have to SHIFT to see them

Sunday 1-Jan-2023

... by: Angelika, Germany

When I go to archive of Str8ts and click on an older one, it changes to that one, but when I then click on printable version, what I see then is the Str8ts of the day

Andrew Stuart writes:

Excellent catch, thanks. I've just fixed it. Daily Str8ts version is now v2.13b, [CTRL]+[F5] if you don’t see that
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Thank-you everyone for all your questions and contributions.