Feedback and Questions

What a great site. I came just looking for new patterns for solving beyond what I had done for years, and I ended with a perennially open tab in my browser!

I'm truly impressed by the complexity of some of these solving methods, yet you have code to pull them off as well! I was in a long hiatus from Sudoku for many years, and then one day prompted an AI chat with a NYT sudoku I was stuck on... It UTTERLY failed to comprehend Sudoku at all. Tried, but failed. Then I fell in the rabbit hole: Can I write some front end to solve and create puzzles? How do you break down the steps we take in our heads and while solving? ...and so on. Not sure I came out on top of it all, but i did get somewhere: http://dice.phillipwildhirt.com/sudoku

Anyways, found your site and now the world has opened up! Just makes me want to start all over and try again! Thanks for your work!

Hi / I’m not sure if it’s me, but I have noticed the following issue since using the new Version 2.47.1 of the suduko solver on my iPad :-

If you select a cell in the solver to edit the candidates (ie touch the cell on the iPad screen) and then realise it’s not the cell you wanted , you used to be able to immediately select another cell. With the new software if you select a second cell without hitting the return key first, it blanks (hides) the contents of the second cell selected.

You can make the cell candidates visible again by toggling the candidates shown tick box off and on, but it wont allow you to edit the candidates.

The only option I can find is to delete the ipad page and reload the solver from the daily page, thus losing all my edits in the solver.

I’ve tried removing the solver from memory and rebooting but to no avail.

Tested on 2 separate iPads.

Regards

Jon

The Killer Sudoku Solver "New Killer" popup no longer seems to work in the Pale Moon browser :(

I find this so handy when I've got really stumped on a killer. Thank you so much for doing this - clearly a labour of love (whether that's of numbers or coding ...)

However, I am struggling to get it to solve puzzle no 157 from dailysudoku.com
https://www.dailykillersudoku.com/search?n=157
Their solution has 2 & 8 in H1 & J1 but Killer Sudoku Solver deduces that it should be 3 & 7 - and then it comes up with an error in G6 as it wants to put a 3 in this cell (when it should be a 2)
Load Puzzle
Keep up the good work

Could I please trouble you fixing a bug that causes one to make mistakes when eliminating numbers with highlighting in the solver?
When you got a set of numbers highlighted and edit numbers it may happen that some cells get updated but the highlighting is not recalculated for those cells. That may result in overlooking numbers and making mistakes. As it is now, after making edits you have to un-highlight the numbers and highlight them again. All you need to do is remember the set of highlighted numbers and recalculate the highlighting for all cells. Thanks!

Tridagon bug

https://www.sudokuwiki.org/Tridagons

In the Tridagon strategy, the solver is missing some eliminations in the "More than one Guardian" scenario.

One of the examples from Phil's folly (linked from the page):

........1.....2.3...4.15.......346...47..8.1.6.31.78...78...1.63...8..744.67.138.

After applying basic strategies, there is a tridagon pattern on candidates 259 in boxes 4679, with 2 guardians digits: 1 in r4c3 and 1 in r8c3. Since the guardians are all the same digit, and since the candidate 1 in r2c3 sees all of the guardians, it should be eliminated.

Friday's Killer doesn't solve in the solver!

To Ayumu and Davin - You both are absolutely correct. I had erroneously interpreted the description in the Bird Exocet document to imply two cases for the cover-houses 1) orthogonal to the cover lines or 2) 1 parallel and 1 orthogonal. That is not the case as you both observed. Thank you for the correction.

why can we not see the solutions for the other levels in the daily puzzles? only the level that initially loads up.

The Jigsaw Sudoku print function is not printing the puzzle.