public int ScoreBoard(ulong board)
{
int score = 0;
for (int i = 0; i < 16; i++)
{
int value = BitShifter.GetNibbleFromIndex(i, board);
if (value > 1)
{
score += (value) * (1 << value);
}
}
int mono = 0;
int cornerTiles = 0;
for (int i = 0; i < 16; i++)
{
var edges = GetEdgesFromId(i).ToArray();
if (edges.Length == 2)
{
cornerTiles += BitShifter.GetNibbleFromIndex(i, board);
}
foreach (var e in edges)
{
mono += Math.Abs(BitShifter.GetNibbleFromIndex(i, board) - BitShifter.GetNibbleFromIndex(e, board));
}
}
int spaces = BitShifter.CountSpaces(board);
var result = (int)(score * ScoreW - mono * MonoW + cornerTiles * CornerW + spaces * SpaceW);
return(result > 0 ? result : 0);
}