all tests passing. Sudoku solves problems
improve output format
cells are comparable. Boards can sort their cells
cells can pick one of their remaining values to become finalized
board.sort does not change order of cells
commented
reset master branch
reduce iterations in sudoku.solve
cells can pick a value to be finalized
SudokuSolver has simple solve
Merge pull request #2 from Neilos/master

Sudoku problem solved