Sudoku Solver

Just for fun. Read in a json file with 81 numbers, will solve and print the solution.

Usage

In irb:

load 'lib/sudoku.rb'
game = Sudoku::Game.new
game.load_gamefile 'test/fixtures/game.json'
game.solve # => true
puts game

TODO

• Add more puzzles for testing
• Move current solution to "Deductive" strategy
• Add brute force backtracking strategy
• Add Dancing Links strategy
• Handle unsolvable puzzles
• Handle puzzles with multiple solutions (more common with hard puzzles)
• CLI:
  • Read json: sudoku [json filename]
  • Read Rubyquiz format: sudoku
• Image processing? (ie read the puzzle from an image)
  • Tesseract OCR
• Fix stack level error when inspecting objects (recursive relationships make an infinite loop)