private static int EvaluateForWhite(Board board)
{
int score = 0;
// pawns
byte[] pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhitePawnNumber + 6]);
int opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackPawnNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, PawnValue, WhitePawnSquareTable);
// rooks
pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhiteRookNumber + 6]);
opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackRookNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, RookValue, WhiteRookSquareTable);
// knights
pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhiteKnightNumber + 6]);
opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackKnightNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, KnightValue, WhiteKnightSquareTable);
// bishops
pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhiteBishopNumber + 6]);
opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackBishopNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, BishopValue, WhiteBishopSquareTable);
// queens
pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhiteQueenNumber + 6]);
opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackQueenNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, QueenValue, WhiteQueenSquareTable);
// king
int[] kingSquareTable = (board.GetGameStage() == Constants.GameStage_Middle) ? WhiteKingMiddleGameSquareTable :
WhiteKingEndGameSquareTable;
pieceIndices = BitHelper.GetSetBitIndexes2(board.PieceToBitboard[Constants.WhiteKingNumber + 6]);
opponentPiecesCount = BitHelper.GetNumberOfSetBits(board.PieceToBitboard[Constants.BlackKingNumber + 6]);
score += CalculateScore(pieceIndices, opponentPiecesCount, KingValue, kingSquareTable);
return score;
}