private bool CheckForLastMissingPart(SumCell sumCell, int sum, GameCell[] parts, Direction direction)
{
var unSolvedCells = new List <GameCell>();
foreach (var gameCell in parts)
{
if (gameCell.IsSolved)
{
var gameCellValue = gameCell.Value;
sumCell.AddAlreadySolved(gameCellValue, direction);
sum -= gameCellValue;
}
else
{
unSolvedCells.Add(gameCell);
}
}
var unSolvedCount = unSolvedCells.Count;
if (unSolvedCount == 1)
{
unSolvedCells[0].MarkAsSolved(sum);
return(true);
}
if (unSolvedCount > 1)
{
if (EliminatePossibilitiesBasedOnRemainingUnSolvedSubset(sum, unSolvedCount, unSolvedCells))
{
return(true);
}
var possibleSets = NumberSets[NumberSet.KeyFrom(unSolvedCount, sum)].Sets;
var alreadySolved = sumCell.GetAlreadySolved(direction);
var remainingPossibleSets = possibleSets.Where(x => !x.Intersect(alreadySolved).Any());
// foreach (var set in remainingPossibleSets)
// {
// foreach (var value in set)
// {
// foreach (var unSolvedCell in unSolvedCells)
// {
// unSolvedCell.IsTheValuePossibleSolution(value);
// }
// }
// }
}
return(false);
}
private void BuildGameCellChainForSumCell(SumCell currentCell, Func <int, Cell> cellAt, int startPosition, int endPosition, Direction direction)
{
for (var i = startPosition; i < endPosition; i++)
{
if (cellAt(i) is GameCell gameCell)
{
currentCell.AddPartGameCell(gameCell, direction);
}
else
{
break;
}
}
}
private bool EliminateNeverUsedNumbers(SumCell sumCell, string lookupKey, GameCell[] partCells, Direction direction)
{
foreach (var gameCell in partCells.Where(x => x.IsSolved))
{
sumCell.AddAlreadySolved(gameCell.Value, direction);
}
var neverUsed = NumberSets[lookupKey].NeverUsed;
var alreadySolved = sumCell.GetAlreadySolved(direction);
var eliminationList = neverUsed.Union(alreadySolved);
var anythingSolved = false;
foreach (var gameCell in partCells.Where(x => !x.IsSolved))
{
if (gameCell.EliminateTheNumbers(eliminationList.ToArray()))
{
anythingSolved = true;
}
}
return(anythingSolved);
}
public static Cell NewCell(string initialValue, int xPosition, int yPosition)
{
if (initialValue.Equals("x", StringComparison.InvariantCultureIgnoreCase))
{
return(new RemovedCell(xPosition, yPosition));
}
if (initialValue.Contains(@"\"))
{
var sumCell = new SumCell(xPosition, yPosition);
var parts = initialValue.Split(@"\");
if (parts[0].Length == 0)
{
sumCell.HasSumY = false;
}
else
{
sumCell.HasSumY = true;
sumCell.SumY = int.Parse(parts[0]);
}
if (parts[1].Length == 0)
{
sumCell.HasSumX = false;
}
else
{
sumCell.HasSumX = true;
sumCell.SumX = int.Parse(parts[1]);
}
return(sumCell);
}
return(new GameCell(xPosition, yPosition));
}