B4J Tutorial B4J Sudoku

Just for the fun of it....

Button Create = uses class dlx_generator to create a new puzzle
Button New Puzzle = use a variant of 1 of the 742 puzzles embedded in the code (randomly swapping columns/rows to create more than the 742 puzzles)
Button Solve = obviously solving the current puzzle.

It uses the Dancing Links algorithm by Donald Knuth to solve the puzzles (and also to create puzzles when clicking on button Create).

 

[William Lancee]

A master class in the use of inline Java in B4X!

Three years ago I wrote an Sudoku app for my phone (B4A) to entertain myself on my weekly visits to an aging relative.
It could also solve the puzzles, but your app computes solutions at least 1000 x faster.

 

[BlueVision]

This man definitely needs a new creative challenge....
Johan, well done.
And now the same again for next week's lottery numbers. Thanks for that already!

 

[klaus]

I do not know if you remember that there was a contest to write the quickest Sudoku solver.
I suppose that the solver would work on all three platforms.
Anyway, great job !!!

 

[Johan Schoeman]

A "playable" version is here

I'm trying to make a sudoku game in android but I'm new in programming

Hi everyone, I was thinking of creating a game of sudoku but I don't know where to start I thought about making the grids for it first and search for some ways to do it and didn't find a way to make some work. I thought of making it by levels like I'll put the numbers myself for each level and...

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