private void HakuHatsuChun(int offset)
{
for (var i = 0; i < 3; i++)
{
if (_arrangement.ContainsKoutsu(i + 4))
{
SumValue |= 0b1L << (offset + i);
}
}
}
private static bool Matches(ArrangementGroup arrangements, Arrangement arrangement, FuConstraint constraint)
{
if (constraint.DoujunIndex >= 0 && !arrangement.ContainsShuntsu(constraint.DoujunIndex))
{
// open hands with less than 6 tiles in the arrangement can use a meld to get sanshoku
if (arrangements.TileCount > 5 || !constraint.Open)
{
return(false);
}
}
if (constraint.DoukouIndex >= 0 && !arrangement.ContainsKoutsu(constraint.DoukouIndex))
{
// hands with less than 6 tiles in the arrangement can use a meld to get sanshoku. If closed must be ankan
if (arrangements.TileCount > 5)
{
return(false);
}
}
var hasIipeikou = arrangement.Blocks.Where(b => b.IsShuntsu).GroupBy(s => s.Index).Any(g => g.Count() >= 2);
if (arrangements.HasIipeikou && !constraint.Open && !hasIipeikou)
{
if (!arrangements.HasSquareType || constraint.SquareIsNotSanankou)
{
return(false);
}
}
if (constraint.SquareIsNotSanankou && arrangement.Blocks.Count(b => b.IsKoutsu) >= 3)
{
return(false);
}
return(true);
}