public static int Evaluate(BoardState board, EvaluationStatistics statistics, int openingPhase, int endingPhase)
{
var entry = PawnHashTable.Get(board.PawnHash);
if (entry.IsKeyValid(board.PawnHash))
{
#if DEBUG
statistics.PHTHits++;
#endif
return(entry.Score);
}
#if DEBUG
else
{
statistics.PHTNonHits++;
if (entry.Key != 0 || entry.Score != 0)
{
statistics.PHTReplacements++;
}
}
#endif
var result = Evaluate(board, Color.White, openingPhase, endingPhase) -
Evaluate(board, Color.Black, openingPhase, endingPhase);
PawnHashTable.Add(board.PawnHash, (short)result);
#if DEBUG
statistics.PHTAddedEntries++;
#endif
return(result);
}
public static int Evaluate(BoardState board, EvaluationStatistics statistics, int openingPhase, int endingPhase)
{
var entry = PawnHashTable.Get(board.PawnHash);
if (entry.IsKeyValid(board.PawnHash))
{
#if DEBUG
statistics.PHTHits++;
#endif
return(TaperedEvaluation.AdjustToPhase(entry.OpeningScore, entry.EndingScore, openingPhase, endingPhase));
}
#if DEBUG
else
{
statistics.PHTNonHits++;
if (entry.Key != 0 || entry.OpeningScore != 0 || entry.EndingScore != 0)
{
statistics.PHTReplacements++;
}
}
#endif
var(openingWhiteScore, endingWhiteScore) = Evaluate(board, Color.White, openingPhase, endingPhase);
var(openingBlackScore, endingBlackScore) = Evaluate(board, Color.Black, openingPhase, endingPhase);
var openingScore = openingWhiteScore - openingBlackScore;
var endingScore = endingWhiteScore - endingBlackScore;
var result = TaperedEvaluation.AdjustToPhase(openingScore, endingScore, openingPhase, endingPhase);
PawnHashTable.Add(board.PawnHash, (short)openingScore, (short)endingScore);
#if DEBUG
statistics.PHTAddedEntries++;
#endif
return(result);
}