Sudoku - tools

A sudoku is logic puzzle, where each number is only allowed once per row, column and box. The purpose of this tools is, to provide a game, that can help you to get better over time.

implemented features

• Solver
  • solved
  • show_possibles
  • singles
  • naked_pairs
  • naked_triples
  • hidden_pairs
  • hidden_tripples
  • pointing_pairs
  • box_line_reduction
  • xwing
  • single_chain (rule 4)
• GUI
  • showing the board
  • showing possible numbers
  • saving a board
  • loading a board

Planned features

• Solver
  • single_chain (rule 2)
  • y_wing
  • sword_fish
  • xyz_wing (?)
• GUI
  • possibility to play a game
  • mouse / touch only use
  • keyboard only use
  • logical hints
    • instead of revealing a random number, they should provide tips how to move forward
    • the tips should start vague, like: look for pointing pairs
    • if you still don't get it, it should be more specific like: look in rows
    • then it could tell you the specific row
    • in the end could show you the specific pointing pair

The goal of this program is to have a collection of sudoku tools.

Planned is a solver, a tool to rate the difficulty of sudokus, a universal sudoku game, and a game mode that gives you useful hints when you get stuck. Or even lets you train to find specific reduction techniques.

More information

Sudokuwiki has a great list of techniques on how to solve sudokus. These can be used to grade puzzles.

https://www.sudokuwiki.org/sudoku.htm

Example of an hard sudoku

hard:63.....81.2...3.......1743..964..57....762....8....6...6..2....3.9....6.........9