internal void AssignGuess(CellWithSolutions cellWithLeastSolutions, int guess)
{
var cell = cellWithLeastSolutions.Cell;
var elements = Board.GetSudokuElements(cell.X, cell.Y);
SudokuElementSolution.RemovePossibility(elements, guess);
Board.CellsSolution[cell.X, cell.Y] = guess;
UnsolvedCells.Remove(cell);
}
private protected virtual void Guess(Game game, CellWithSolutions cellWithLeastSolutions)
{
foreach (var guess in cellWithLeastSolutions.Solutions)
{
var gameSnapshot = game.Clone();
gameSnapshot.AssignGuess(cellWithLeastSolutions, guess);
Solve(gameSnapshot);
}
}
private protected override void Guess(Game game, CellWithSolutions cellWithLeastSolutions)
{
var mixedSolutions = cellWithLeastSolutions.Solutions.ToList().Shuffle();
foreach (var guess in mixedSolutions)
{
var gameSnapshot = game.Clone();
gameSnapshot.AssignGuess(cellWithLeastSolutions, guess);
Solve(gameSnapshot);
}
}
internal CellWithSolutions?FindCellWithLeastSolutions()
{
var leastSolutions = 10;
CellWithSolutions?cellWithLeastOptions = null;
foreach (var cell in UnsolvedCells)
{
var elements = Board.GetSudokuElements(cell.X, cell.Y);
var solutions = SudokuElementSolution.GetValidValues(elements);
var count = solutions.Count();
if (count < leastSolutions && count > 0)
{
leastSolutions = count;
cellWithLeastOptions = new CellWithSolutions(cell, solutions);
}
}
return(cellWithLeastOptions);
}
