private void RememberPossibleCellValues()
{
if (CellValue.RealValues.Contains(Value))
{
return;
}
foreach (var value in Sqr.ImpossibleValues)
{
RememberValueCanNotBe(value);
}
foreach (var value in Sqr.PossibleValues)
{
if (CanBe(value) == Tristate.No)
{
continue;
}
if (Row.Contains(value))
{
RememberValueCanNotBe(value); continue;
}
if (Col.Contains(value))
{
RememberValueCanNotBe(value); continue;
}
RememberValueCanBe(value);
}
}
private bool ExistsAlreadyInGroup(CellValue value)
{
if (Row.Contains(value))
{
return(true);
}
if (Col.Contains(value))
{
return(true);
}
if (Sqr.Contains(value))
{
return(true);
}
return(false);
}