/// <summary>
/// Does an AI move.
/// </summary>
private void MoveAI()
{
Task.Run(() =>
{
var openingBookMove = _openingBook.GetMoveFromBook(_history);
var enemyColor = ColorOperations.Invert(_currentColor);
Move moveToApply = null;
if (openingBookMove != null)
{
moveToApply = Bitboard.Moves.First(p =>
p.From == openingBookMove.From && p.To == openingBookMove.To);
}
else
{
var aiResult = _ai.Calculate(_currentColor, Bitboard, _preferredTime, _helperTasksCount);
moveToApply = aiResult.PVNodes[0];
ConsoleManager.WriteLine();
ConsoleManager.WriteLine($"$w{_currentColor}:");
ConsoleManager.WriteLine($"$wBest move: $g{aiResult.PVNodes} $w(Score: $m{aiResult.Score}$w)");
ConsoleManager.WriteLine($"$wTotal nodes: $g{aiResult.Stats.TotalNodes} N $w(Depth: $m{aiResult.Depth}$w)");
ConsoleManager.WriteLine($"$wTime: $m{aiResult.Time} s");
ConsoleManager.WriteLine();
}
CalculateBitboard(moveToApply, false);
CheckIfGameHasEnded(Bitboard);
_currentColor = enemyColor;
_history.Add(moveToApply);
});
}
/// <summary>
/// Checks if king with the specified color is in stalemate.
/// </summary>
/// <param name="color">The king color.</param>
/// <returns>True if king with specified color is in stalemate, otherwise false.</returns>
public bool IsStalemate(Color color)
{
if (!_calculated)
{
throw new BitboardNotCalculatedException();
}
var bitboardWithoutEnPassant = new Bitboard(this);
bitboardWithoutEnPassant.EnPassant[(int)color] = 0;
var ai = new AICore();
var aiResult = ai.Calculate(color, bitboardWithoutEnPassant, 0, 0);
return(!IsCheck(color) && Math.Abs(aiResult.Score) == AIConstants.MateValue);
}
/// <summary>
/// Runs AI and does best found move.
/// </summary>
/// <param name="color">The engine color.</param>
/// <returns>The AI result.</returns>
public AIResult MoveAI(Color color)
{
Bitboard.Calculate(GeneratorMode.CalculateMoves | GeneratorMode.CalculateAttacks, false);
CheckBitboardIntegrity();
UpdateMovesCount(color);
if (CheckIfGameHasEnded())
{
return(null);
}
var openingBookMove = _openingBook.GetMoveFromBook(_history);
if (openingBookMove != null)
{
var moveToApply =
Bitboard.Moves.First(p => p.From == openingBookMove.From && p.To == openingBookMove.To);
Bitboard = Bitboard.Move(moveToApply);
_history.Add(moveToApply);
return(new AIResult()
{
PVNodes = new PVNodesList()
{
moveToApply
}
});
}
else
{
var preferredTime = _preferredTimeCalculator.Calculate(MovesCount, _remainingTime[(int)color]);
var aiResult = _aiCore.Calculate(color, Bitboard, preferredTime);
// Temporary
if (aiResult.PVNodes.Count < 1)
{
Console.WriteLine($"Move not found");
return(null);
}
Bitboard = Bitboard.Move(aiResult.PVNodes[0]);
_history.Add(aiResult.PVNodes[0]);
return(aiResult);
}
}
/// <summary>
/// Runs AI calculating.
/// </summary>
/// <param name="command">The AI command</param>
private void CalculateBestMove(Command command)
{
var colorArgument = command.GetArgument <string>(0);
var preferredTimeArgument = command.GetArgument <float>(1);
var helperTasksCount = command.GetArgument <int>(2);
var colorParseResult = Enum.TryParse(colorArgument, true, out Color color);
if (!colorParseResult)
{
ConsoleManager.WriteLine($"$rInvalid color type ($R{color}$r)");
return;
}
var ai = new AICore();
var aiResult = ai.Calculate(color, Bitboard, preferredTimeArgument, helperTasksCount);
ConsoleManager.WriteLine();
if (aiResult.PVNodes.Count == 0)
{
ConsoleManager.WriteLine("$gMate");
}
else
{
ConsoleManager.WriteLine($"$wDepth: $g{aiResult.Depth}");
ConsoleManager.WriteLine($"$wTotal nodes: $g{aiResult.Stats.TotalNodes} N");
ConsoleManager.WriteLine($"$wEnd nodes: $g{aiResult.Stats.EndNodes} N");
ConsoleManager.WriteLine($"$wα-β cutoffs: $y{aiResult.Stats.AlphaBetaCutoffs} N");
ConsoleManager.WriteLine($"$wTT hits: $y{aiResult.Stats.TranspositionTableHits} N");
ConsoleManager.WriteLine($"$wBranching factor: $y{aiResult.Stats.BranchingFactor}");
ConsoleManager.WriteLine($"$wNodes per second: $c{aiResult.NodesPerSecond / 1000} kN");
ConsoleManager.WriteLine($"$wTime per node: $c{aiResult.TimePerNode} ns");
ConsoleManager.WriteLine($"$wTime: $m{aiResult.Time} s");
ConsoleManager.WriteLine();
ConsoleManager.WriteLine($"$wQ Total nodes: $g{aiResult.Stats.QuiescenceTotalNodes} N");
ConsoleManager.WriteLine($"$wQ End nodes: $g{aiResult.Stats.QuiescenceEndNodes} N");
ConsoleManager.WriteLine();
ConsoleManager.WriteLine($"$wBest move: $g{aiResult.PVNodes}");
ConsoleManager.WriteLine($"$wScore: $m{aiResult.Score}");
}
ConsoleManager.WriteLine();
}