Marcel Hendrix wrote: "jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku Marcel Hendrix wrote: [..] (original) 2.554 milliseconds ok (yz) 2.564 milliseconds ok Robert did his...> Well, a reason could be that your code is faster, but the Sudoku solver is spending much more time somewhere else. Code with EXITs in it...

Marcel Hendrix wrote: "jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku Upon looking at the original code again, I found this algorithmic speed up. [..] Please run and compare the difference. Aye, aye! (original) 2.554 milliseconds ok (yz) 2.564 milliseconds ok Robert ...

"jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku Marcel Hendrix wrote: [..] (original) 2.554 milliseconds ok (yz) 2.564 milliseconds ok Robert did his homework ... and...prove it. Well, a reason could be that your code is faster, but the Sudoku solver is spending much more time somewhere else. Code with EXITs in it can...

... Hendrix wrote: "jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku I went back and looked at Robert Spykerman's sudoku backtracking solver, http://www-personal.umich.edu/~williams/archive/forth/utilities/sudoku.fs because of the current sudoku thread here, and found some code simplifications/speedups. I don't know if the code from ...

"jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku Upon looking at the original code again, I found this algorithmic speed up. [..] Please run and compare the difference. Aye, aye! (original) 2.554 milliseconds ok (yz) 2.564 milliseconds ok Robert did his homework ... and moved on, unfortunately. -marcel

Gerry wrote: Marcel Hendrix wrote: "rickman" <gnu...@gmail.com> writes Re: Spykerman Sudoku [..] I also have another puzzle from my local paper that I have not...) 1.628 milliseconds (A `minimal' Sudoku (thought impossible for humans)) 0.045 milliseconds (...first one on the list with the (modified) Spykerman code like this: Again, using gforth 0.6...

Marcel Hendrix wrote: "rickman" <gnu...@gmail.com> writes Re: Spykerman Sudoku [..] I also have another puzzle from my local paper that I have not been able to solve by hand.... milliseconds (Paul Hsieh's example #3) 1.628 milliseconds (A `minimal' Sudoku (thought impossible for humans)) 0.045 milliseconds (Ertl #1) 0.101 ...

"Gerry" <gerry@jackson9000.fsnet.co.uk> writes Re: Spykerman Sudoku [..] If anyone wants to try some hard Sudokus look at http://people.csse.uwa.edu.au/gordon/sudokumin.php where there is a file containing 36628 minimal Sudokus. Minimal means only 17 numbers supplied in the puzzle and a unique solution. Here are some ...

"jzakiya" <jzakiya@mail.com> writes Re: Spykerman Sudoku I went back and looked at Robert Spykerman's sudoku backtracking solver, http://www-personal.umich.edu/~williams/archive/forth/utilities/sudoku.fs because of the current sudoku thread here, and found some code simplifications/speedups. I don't know if the code from the above ...

"rickman" <gnu...@gmail.com> writes Re: Spykerman Sudoku [..] I also have another puzzle from my local paper that I have not been able to solve by hand. It ... #2) 0.027 milliseconds (Paul Hsieh's example #3) 1.628 milliseconds (A `minimal' Sudoku (thought impossible for humans)) 0.045 milliseconds (Ertl #1) 0.101 milliseconds (Ertl #2)...