public static int Evaluate(BoardState board, bool enableCache, EvaluationStatistics statistics)
{
var openingPhase = board.GetPhaseRatio();
var endingPhase = BoardConstants.PhaseResolution - openingPhase;
var result = MaterialEvaluator.Evaluate(board);
result += enableCache ?
PawnStructureEvaluator.Evaluate(board, statistics, openingPhase, endingPhase) :
PawnStructureEvaluator.EvaluateWithoutCache(board, statistics, openingPhase, endingPhase);
result += PositionEvaluator.Evaluate(board, openingPhase, endingPhase);
if (endingPhase != BoardConstants.PhaseResolution)
{
var fieldsAttackedByWhite = 0ul;
var fieldsAttackedByBlack = 0ul;
result += MobilityEvaluator.Evaluate(board, openingPhase, endingPhase, ref fieldsAttackedByWhite, ref fieldsAttackedByBlack);
result += KingSafetyEvaluator.Evaluate(board, openingPhase, endingPhase, fieldsAttackedByWhite, fieldsAttackedByBlack);
result += RookEvaluator.Evaluate(board, openingPhase, endingPhase);
result += BishopEvaluator.Evaluate(board, openingPhase, endingPhase);
}
return(board.ColorToMove == Color.White ? result : -result);
}
private void OnSearchUpdate(object sender, SearchStatistics stats)
{
var score = FormatScore(stats.Score);
var principalVariation = FormatPrincipalVariation(stats.PrincipalVariation, stats.PrincipalVariationMovesCount);
Send($"info depth {stats.Depth} seldepth {stats.SelectiveDepth} time {stats.SearchTime} " +
$"score {score} nodes {stats.TotalNodes} nps {stats.TotalNodesPerSecond} pv {principalVariation}");
if (_debugMode && stats.PrincipalVariationMovesCount > 0 && stats.PrincipalVariation[0] != Move.Empty)
{
var sign = stats.Board.ColorToMove == Color.White ? 1 : -1;
stats.Board.MakeMove(stats.PrincipalVariation[0]);
var evaluationStatistics = new EvaluationStatistics();
var openingPhase = stats.Board.GetPhaseRatio();
var endingPhase = BoardConstants.PhaseResolution - openingPhase;
var fieldsAttackedByWhite = 0ul;
var fieldsAttackedByBlack = 0ul;
var materialEvaluation = sign * MaterialEvaluator.Evaluate(stats.Board);
var positionEvaluation = sign * PositionEvaluator.Evaluate(stats.Board, openingPhase, endingPhase);
var pawnStructureEvaluation = sign * PawnStructureEvaluator.Evaluate(stats.Board, evaluationStatistics, openingPhase, endingPhase);
var mobility = sign * MobilityEvaluator.Evaluate(stats.Board, openingPhase, endingPhase, ref fieldsAttackedByWhite, ref fieldsAttackedByBlack);
var kingSafety = sign * KingSafetyEvaluator.Evaluate(stats.Board, openingPhase, endingPhase, fieldsAttackedByWhite, fieldsAttackedByBlack);
var rooks = sign * RookEvaluator.Evaluate(stats.Board, openingPhase, endingPhase);
var bishops = sign * BishopEvaluator.Evaluate(stats.Board, openingPhase, endingPhase);
var total = materialEvaluation + positionEvaluation + pawnStructureEvaluation +
mobility + kingSafety;
Send($"info string evaluation {total} phase {openingPhase} material {materialEvaluation} " +
$"position {positionEvaluation} pawns {pawnStructureEvaluation} mobility {mobility} ksafety {kingSafety} " +
$"rooks {rooks} bishops {bishops} irrmoves {stats.Board.IrreversibleMovesCount}");
stats.Board.UndoMove(stats.PrincipalVariation[0]);
}
}
public void Run(params string[] parameters)
{
var fen = string.Join(' ', parameters);
var boardState = FenToBoard.Parse(fen, false);
var evaluationStatistics = new EvaluationStatistics();
var openingPhase = boardState.GetPhaseRatio();
var endingPhase = BoardConstants.PhaseResolution - openingPhase;
var fieldsAttackedByWhite = 0ul;
var fieldsAttackedByBlack = 0ul;
var materialEvaluation = MaterialEvaluator.Evaluate(boardState);
var positionEvaluation = PositionEvaluator.Evaluate(boardState, openingPhase, endingPhase);
var pawnStructureEvaluation = PawnStructureEvaluator.EvaluateWithoutCache(boardState, evaluationStatistics, openingPhase, endingPhase);
var mobility = MobilityEvaluator.Evaluate(boardState, openingPhase, endingPhase, ref fieldsAttackedByWhite, ref fieldsAttackedByBlack);
var kingSafety = KingSafetyEvaluator.Evaluate(boardState, openingPhase, endingPhase, fieldsAttackedByWhite, fieldsAttackedByBlack);
var rooks = RookEvaluator.Evaluate(boardState, openingPhase, endingPhase);
var bishops = BishopEvaluator.Evaluate(boardState, openingPhase, endingPhase);
var total = materialEvaluation + positionEvaluation + pawnStructureEvaluation +
mobility + kingSafety;
_interactiveConsole.WriteLine($"Evaluation for board with hash {boardState.Hash} (phase {openingPhase}, " +
$"{boardState.IrreversibleMovesCount} irreversible moves)");
_interactiveConsole.WriteLine($" = Material: {materialEvaluation}");
_interactiveConsole.WriteLine($" = Position: {positionEvaluation}");
_interactiveConsole.WriteLine($" = Pawns: {pawnStructureEvaluation}");
_interactiveConsole.WriteLine($" = Mobility: {mobility}");
_interactiveConsole.WriteLine($" = King safety: {kingSafety}");
_interactiveConsole.WriteLine($" = Rooks: {rooks}");
_interactiveConsole.WriteLine($" = Bishops: {bishops}");
_interactiveConsole.WriteLine();
_interactiveConsole.WriteLine($" = Total: {total}");
}