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);
}
private void IterativeDeepening_OnSearchUpdate(object sender, SearchStatistics statistics)
{
// Main search result
_interactiveConsole.WriteLine($" === Depth: {statistics.Depth}, Score: {statistics.Score}, Best: {statistics.PrincipalVariation[0]}, " +
$"Time: {((float) statistics.SearchTime / 1000):F} s");
// Normal search
_interactiveConsole.WriteLine($" Normal search: Nodes: {statistics.Nodes}, Leafs: {statistics.Leafs}, " +
$"Branching factor: {statistics.BranchingFactor:F}, Beta cutoffs: {statistics.BetaCutoffs}");
// Quiescence search
_interactiveConsole.WriteLine($" Q search: Nodes: {statistics.QNodes}, Leafs: {statistics.QLeafs}, " +
$"Branching factor: {statistics.QBranchingFactor:F}, Beta cutoffs: {statistics.QBetaCutoffs}");
// Total
_interactiveConsole.WriteLine($" Total: Nodes: {statistics.TotalNodes} ({((float)statistics.TotalNodesPerSecond / 1000000):F} MN/s), " +
$"Leafs: {statistics.TotalLeafs}, Branching factor: {statistics.TotalBranchingFactor:F}, " +
$"Beta cutoffs: {statistics.TotalBetaCutoffs}");
#if DEBUG
// Beta cutoffs at first move
_interactiveConsole.WriteLine($" Beta cutoffs at first move: {statistics.BetaCutoffsAtFirstMove} ({statistics.BetaCutoffsAtFirstMovePercent:F} %), " +
$"Q Beta cutoffs at first move: {statistics.QBetaCutoffsAtFirstMove} ({statistics.QBetaCutoffsAtFirstMovePercent:F} %)");
// Transposition statistics
_interactiveConsole.WriteLine($" TT: " +
$"Added: {statistics.TTAddedEntries}, " +
$"Replacements: {statistics.TTReplacements} ({statistics.TTReplacesPercent:F} %), " +
$"Hits: {statistics.TTHits} ({statistics.TTHitsPercent:F} %), " +
$"Missed: {statistics.TTNonHits}, " +
$"Filled: {TranspositionTable.GetFillLevel():F} %");
// Pawn hash table statistics
_interactiveConsole.WriteLine($" PHT: " +
$"Added: {statistics.EvaluationStatistics.PHTAddedEntries}, " +
$"Replacements: {statistics.EvaluationStatistics.PHTReplacements} ({statistics.EvaluationStatistics.PHTReplacesPercent:F} %), " +
$"Hits: {statistics.EvaluationStatistics.PHTHits} ({statistics.EvaluationStatistics.PHTHitsPercent:F} %), " +
$"Missed: {statistics.EvaluationStatistics.PHTNonHits}, " +
$"Filled: {PawnHashTable.GetFillLevel():F} %");
// Evaluation hash table statistics
_interactiveConsole.WriteLine($" EHT: " +
$"Added: {statistics.EvaluationStatistics.EHTAddedEntries}, " +
$"Replacements: {statistics.EvaluationStatistics.EHTReplacements} ({statistics.EvaluationStatistics.EHTReplacesPercent:F} %), " +
$"Hits: {statistics.EvaluationStatistics.EHTHits} ({statistics.EvaluationStatistics.EHTHitsPercent:F} %), " +
$"Missed: {statistics.EvaluationStatistics.EHTNonHits}, " +
$"Filled: {EvaluationHashTable.GetFillLevel():F} %");
_interactiveConsole.WriteLine($" Valid TT moves: {statistics.TTValidMoves}, Invalid TT moves: {statistics.TTInvalidMoves}, " +
$"IID hits: {statistics.IIDHits}, Loud generations: {statistics.LoudMovesGenerated}, " +
$"Quiet generations: {statistics.QuietMovesGenerated}");
#endif
_interactiveConsole.WriteLine();
}
public void Run(params string[] parameters)
{
TranspositionTable.Clear();
PawnHashTable.Clear();
EvaluationHashTable.Clear();
KillerHeuristic.Clear();
HistoryHeuristic.Clear();
_uciClient.BoardState.SetDefaultState();
}
private void Test(BoardState boardState, string name, int depth)
{
_interactiveConsole.WriteLine($" == {name}:");
TranspositionTable.Clear();
PawnHashTable.Clear();
EvaluationHashTable.Clear();
KillerHeuristic.Clear();
HistoryHeuristic.Clear();
var context = new SearchContext(boardState)
{
MaxDepth = depth
};
IterativeDeepening.OnSearchUpdate += IterativeDeepening_OnSearchUpdate;
IterativeDeepening.FindBestMove(context);
IterativeDeepening.OnSearchUpdate -= IterativeDeepening_OnSearchUpdate;
_interactiveConsole.WriteLine();
}
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);
}