int RunTest()
{
nodeSearchCount = 0;
BoardGround.SetPositionFromFen(fen);
TimerGround.Start("PerftGround");
PerfTest(searchDepth);
TimerGround.Stop("PerftGround");
TimerGround.Print("PerftGround");
print("Leaf nodes at depth " + searchDepth + ": " + nodeSearchCount);
return(nodeSearchCount);
}
public static void GenerateBook()
{
TimerGround.Start("Book Generation");
string[] gmGames = Directory.GetFiles("Assets/Opening Book/GM Games", "*.txt");
string[] openings = Directory.GetFiles("Assets/Opening Book/Openings", "*.txt");
ProcessFiles(gmGames, 60, 20); // for any gm game in database that lasted more than x ply, record first y ply
ProcessFiles(openings, 0, 50); // record first n ply from specially prepared openings database
WriteToFile();
TimerGround.Stop("Book Generation");
TimerGround.Print("Book Generation");
}
public static int Evaluate()
{
TimerGround.Start("Eval");
int materialEval = 0;
int mobilityEval = 0;
int developmentEval = 0;
int kingSafetyEval = 0;
// piece index vars (assigned when found to be used in later calculations)
int whiteKingSquareIndex = -1;
int blackKingSquareIndex = -1;
List <int> whiteQueenIndices = new List <int> (2);
List <int> whiteRookIndices = new List <int> (2);
List <int> whiteKnightIndices = new List <int> (2);
List <int> whiteBishopIndices = new List <int> (2);
List <int> whitePawnIndices = new List <int> (8);
List <int> blackQueenIndices = new List <int> (2);
List <int> blackRookIndices = new List <int> (2);
List <int> blackKnightIndices = new List <int> (2);
List <int> blackBishopIndices = new List <int> (2);
List <int> blackPawnIndices = new List <int> (8);
for (int squareIndex = 0; squareIndex <= 127; squareIndex++)
{
if ((squareIndex & 8) != 0) // don't look at indices which are not on the real board
{
continue;
}
if (BoardGround.boardArray[squareIndex] != 0)
{
int pieceCode = BoardGround.boardArray[squareIndex];
if (pieceCode == BoardGround.kingCode + 1) // found white king
{
whiteKingSquareIndex = squareIndex;
}
else if (pieceCode == BoardGround.kingCode) // found black king
{
blackKingSquareIndex = squareIndex;
}
else // non-king pieces
{
materialEval += pieceValues[pieceCode]; // count material (excluding kings)
switch (pieceCode)
{
case BoardGround.queenCode + 1:
whiteQueenIndices.Add(squareIndex);
break;
case BoardGround.rookCode + 1:
whiteRookIndices.Add(squareIndex);
break;
case BoardGround.knightCode + 1:
whiteKnightIndices.Add(squareIndex);
break;
case BoardGround.bishopCode + 1:
whiteBishopIndices.Add(squareIndex);
break;
case BoardGround.pawnCode + 1:
whitePawnIndices.Add(squareIndex);
break;
case BoardGround.queenCode:
blackQueenIndices.Add(squareIndex);
break;
case BoardGround.rookCode:
blackRookIndices.Add(squareIndex);
break;
case BoardGround.knightCode:
blackKnightIndices.Add(squareIndex);
break;
case BoardGround.bishopCode:
blackBishopIndices.Add(squareIndex);
break;
case BoardGround.pawnCode:
blackPawnIndices.Add(squareIndex);
break;
}
}
}
}
if (whiteKingSquareIndex == -1) // return best score for black if white's king has been captured (this may sometimes be allowed during alphabeta search for faster move generation)
//return int.MinValue;
{
}
// piece mobility
moveGenerator.SetMoveColour(1);
mobilityEval += moveGenerator.GetMoves(false, true, false).Count; // white piece mobility
mobilityEval += moveGenerator.GetMoves(true, true, false).Count; // white piece attacking black
moveGenerator.SetMoveColour(0);
mobilityEval -= moveGenerator.GetMoves(false, true, false).Count; // black piece mobility
mobilityEval -= moveGenerator.GetMoves(true, true, false).Count; // black piece attacking white
// piece development white
for (int i = 0; i < whiteKnightIndices.Count; i++)
{
if (BoardGround.RankFrom128(whiteKnightIndices[i]) == 1) // penalize knight remaining on first rank
{
developmentEval -= 50;
}
else if (BoardGround.RankFrom128(whiteKnightIndices[i]) == 2) // penalize knight remaining on second rank
{
developmentEval -= 10;
}
if (BoardGround.FileFrom128(whiteKnightIndices[i]) == 1) // knights on the rim are dim
{
developmentEval -= 5;
}
else if (BoardGround.FileFrom128(whiteKnightIndices[i]) == 8) // knights on the rim are dim
{
developmentEval -= 5;
}
}
for (int i = 0; i < whiteBishopIndices.Count; i++)
{
if (BoardGround.RankFrom128(whiteBishopIndices[i]) == 1) // penalize bishop remaining on first rank
{
developmentEval -= 50;
}
}
// piece development black
for (int i = 0; i < blackKnightIndices.Count; i++)
{
if (BoardGround.RankFrom128(blackKnightIndices[i]) == 8) // penalize knight remaining on eighth rank
{
developmentEval += 50;
}
else if (BoardGround.RankFrom128(blackKnightIndices[i]) == 7) // penalize knight remaining on seventh rank
{
developmentEval += 10;
}
if (BoardGround.FileFrom128(blackKnightIndices[i]) == 1) // knights on the rim are dim
{
developmentEval += 5;
}
else if (BoardGround.FileFrom128(blackKnightIndices[i]) == 8) // knights on the rim are dim
{
developmentEval += 5;
}
}
for (int i = 0; i < blackBishopIndices.Count; i++)
{
if (BoardGround.RankFrom128(blackBishopIndices[i]) == 8) // penalize bishop remaining on eighth rank
{
developmentEval += 50;
}
}
// king safety white
if (BoardGround.WhiteHasCastlingRights())
{
kingSafetyEval += 10; // not safe, but at least retaining ability to castle
}
else
{
if (whiteKingSquareIndex == 6 || whiteKingSquareIndex == 7) // generally safe kingside squares for king (g1,h1)
{
kingSafetyEval += 50;
for (int i = 0; i < whiteRookIndices.Count; i++)
{
if (BoardGround.FileFrom128(whiteRookIndices[i]) > 6)
{
kingSafetyEval -= 55; // penalize non-castling king manoeuvres where rook is boxed in by king
}
}
}
else if (whiteKingSquareIndex == 2 || whiteKingSquareIndex == 1 || whiteKingSquareIndex == 0) // generally safe queenside squares for king (a1,b1,c1)
{
kingSafetyEval += 50;
for (int i = 0; i < whiteRookIndices.Count; i++)
{
if (BoardGround.FileFrom128(whiteRookIndices[i]) < 3)
{
kingSafetyEval -= 55; // penalize non-castling king manoeuvres where rook is boxed in by king
}
}
}
}
// king safety black
if (BoardGround.BlackHasCastlingRights())
{
kingSafetyEval -= 10; // not safe, but at least retaining ability to castle
}
else
{
if (blackKingSquareIndex == 118 || blackKingSquareIndex == 119) // generally safe kingside squares for king (g8,h8)
{
kingSafetyEval -= 50;
for (int i = 0; i < blackRookIndices.Count; i++)
{
if (BoardGround.FileFrom128(blackRookIndices[i]) > 6)
{
kingSafetyEval += 55; // penalize non-castling king manoeuvres where rook is boxed in by king
}
}
}
else if (blackKingSquareIndex == 114 || blackKingSquareIndex == 113 || blackKingSquareIndex == 112) // generally safe queenside squares for king (a8,b8,c8)
{
kingSafetyEval -= 50;
for (int i = 0; i < blackRookIndices.Count; i++)
{
if (BoardGround.FileFrom128(blackRookIndices[i]) < 3)
{
kingSafetyEval += 55; // penalize non-castling king manoeuvres where rook is boxed in by king
}
}
}
}
int openingMaterialCount = 16 * pawnValue + 4 * (rookValue + knightValue + bishopValue) + 2 * queenValue;
int endgameMaterialCount = 2 * (rookValue + knightValue);
//float gameStage =
int finalEval = materialEval * 1000 + mobilityEval + kingSafetyEval + developmentEval;
TimerGround.Stop("Eval");
return(finalEval);
}