kermalis / sudokusolver Goto Github PK

Hi, a very nice solver.

Interesting because it applies those strategies.
Visually appealing because it displays them and also shows what's going on in the grid.

But unfortunately it got stuck on a specific puzzle file I tested. I had tried that on paper and wanted to see a possible result by running it through your application. It got stuck after maybe 20 steps, reporting 'unsolved'. I don't know if it is a particularly hard puzzle.

I noticed there are a number of unsolved puzzles in one of your directories too.

So I wondered what the status is. Might there be some bugs, or is it a matter of working out more of those strategies?

I am particularly interested because I might work out my own version of this.

Hi!

What is the license for this project? I was looking to perhaps use some of your code in a project of my own, but there is no license specified.

Thanks in advance!

Just curious as to how you compiled the program. I've tried in Visual Studio 2017 and 2019 and it errored-out trying to open MainWindow.cs and SudokuBoard.cs. I'm an intermediate-level programmer trying to review the code to learn new techniques.

The following puzzle (currently named Unsolved - Incorrect 1.txt in the repo):

1549-----
-----41--
-6-75---9
-1---8---
69---7-4-
--5----37
-8-----1-
----3--68
------5--

Avoidable rectangle is applied (because other techniques are not implemented yet)
For now, it points out a flaw with my implementation of avoidable rectangle.

G4 should not be changed because G7 cannot be 6 and D7 cannot be 3. This means a double solution involving G4 is not possible, so the avoidable rectangle should not try to avoid it.

The technique needs to check if it would be a double solution if the three cells were swapped.