this project is somehow a cousin of the project skfr sudoku fast rating

part of the code included here is derived from the former project, but some key changes makes it easier to create a separate project.

The main application in that project skmpp is a code collecting all the tasks needed by the owner for sudoku development, mainly

1)code generation

2)finding a canonical form for a puzzle

3)solving a puzzle with some key options

a main process in line with sudoku explainer guidelines solving using exotic patterns

(see the new players forum for more details)

extension of sudoku explainer capabilities and the end, use of the "full tagging" process formerly developed by the owner.

The solving process is oriented toward hardest puzzles. This is not a training application for beginners

all programs are "batch oriented".