/// <summary>
/// 局面のハッシュキーを取得
/// </summary>
/// <param name="position"></param>
/// <param name="gikouBook"></param>
/// <returns></returns>
public static long ComputeKey(SPosition position, GikouBook gikouBook)
{
long key = 0;
SPosition pos = (SPosition)position.Clone();
// 後手番であれば、将棋盤を１８０度反転して、先手番として扱う
if (pos.Turn == PlayerColor.White)
{
pos.Flip();
}
// 盤上の駒
int gikout_sq = 0;
foreach (var sq in squareTable)
{
key += gikouBook.HashSeeds.GetPsq((int)pos.GetPiece(sq), gikout_sq);
gikout_sq += 1;
}
// 持ち駒
foreach (PlayerColor color in new PlayerColor[] { PlayerColor.Black, PlayerColor.White })
{
for (int pt = 1; pt < SPosition.HandMax; pt++)
{
for (int n = pos.GetHand(color, (PieceType)pt); n > 0; n--)
{
key += gikouBook.HashSeeds.GetHand((int)color, pt);
}
}
}
return(key);
}
/// <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);
}
/// <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;
}