/// <summary>
/// SPositionからApery用のハッシュキーを取得
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
private static ulong GetKey(SPosition pos)
{
ulong key = 0;
// 盤上の駒
for (AperySquare ap = AperySquare.I9; ap < AperySquare.SquareNum; ap++)
{
int sq = Square.Make(ap.FileOf(), ap.RankOf());
Piece piece = pos.GetPiece(sq);
if (piece != Piece.NoPiece)
{
int index = (int)piece.ConvAperyPiece();
key ^= AperyBook.ZobPiece[index][(int)ap];
}
}
// 持ち駒
for (PieceType pt = PieceType.FU; pt < PieceType.King; pt++)
{
int num = pos.GetHand(pos.Turn, pt);
key ^= AperyBook.ZobHand[(int)pt - 1][num];
}
if (pos.Turn == PlayerColor.White)
{
key ^= AperyBook.ZobTurn;
}
return(key);
}
private static int FileOf(this AperySquare sq)
{
return(8 - ((int)sq / 9));
}
private static int RankOf(this AperySquare sq)
{
return((int)sq % 9);
}
