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Strategies for Number Puzzles of all kinds
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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. Please feel free to drop me a note on the side of the page or try the Facebook comment box. Or you can email me directly at .

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Many thanks to all the people who have helped improve the solvers and strategies with their feedback!

Sunday 7-Jan-2018

... by: Pete T., USA- Michigan

Still the best Solver on-line. When I get stumped I come here. When I want to learn or understand a solving strategy I come here. The only suggestion I have is to have each solved number show initially in a different color (maybe yellow) and then change to blue at the next "show possibles". It is sometimes difficult to notice all the solved squares in reviewing the board before they join the other blues. Likewise when using the 'back' button, the latest solved squares could be highlighted to highlight what just happened.
Thanks for a great solver

Andrew Stuart writes (7-Jan-2018):

That’s a sound idea and you catch me in an idle moment. So refresh the solver. I've given new solved cells a blush. I can't see to do yellow since the shadow color seems to blend with the font color which is blue. Odd but otherwise ok I think
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