nullprop/Chess-Challenge
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge branch 'Dev'

Browse source
This commit is contained in:
Sebastian Lague 2023-07-22 21:45:13 +02:00
commit 96cdff5d24
4 changed files with 66 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

48
Chess-Challenge/src/Framework/Application/Helpers/Tester.cs
View file

@ -113,6 +113,17 @@ namespace ChessChallenge.Application
Assert(boardAPI.GetKingSquare(false) == new Square(6, 7), "King square wrong");
Assert(boardAPI.GetPiece(new Square(4, 5)).IsPawn, "Wrong piece");
Assert(!boardAPI.GetPiece(new Square(4, 5)).IsWhite, "Wrong colour");
API.Move testMove = new("g5e6", boardAPI);
boardAPI.MakeMove(testMove);
Assert(boardAPI.GetPiece(new Square("g5")).IsNull, "Wrong piece");
Assert(boardAPI.GetPiece(new Square("e6")).IsKnight, "Wrong piece");
Assert(boardAPI.GetPiece(new Square("e6")).IsWhite, "Wrong piece col");
boardAPI.UndoMove(testMove);
Assert(boardAPI.GetPiece(new Square("e6")).IsPawn, "Wrong piece");
Assert(!boardAPI.GetPiece(new Square("e6")).IsWhite, "Wrong piece col");
Assert(boardAPI.GetPiece(new Square("g5")).IsKnight, "Wrong piece");
}
static void DrawTest()
@ -151,6 +162,43 @@ namespace ChessChallenge.Application
Assert(!boardAPI.IsDraw(), "Draw wrong");
boardAPI.MakeMove(new API.Move("c5d7", boardAPI));
Assert(boardAPI.IsDraw(), "Draw wrong");
string[] notInsufficient =
{
"3k4/4b3/8/8/8/3B4/1K6/8 w - - 0 1",
"3k4/3b4/8/8/8/4B3/1K6/8 w - - 0 1",
"3k4/3b4/8/8/8/2N5/1K6/8 w - - 0 1",
"3k4/3n4/8/8/8/2N5/1K6/8 w - - 0 1",
"8/4k3/8/8/8/2NN4/1K6/8 w - - 0 1",
"8/4k3/8/8/8/8/PK6/8 w - - 0 1",
"8/4k3/8/8/8/8/1K1R4/8 w - - 0 1",
"8/4k3/8/8/8/8/1KQ5/8 w - - 0 1"
};
string[] insufficient =
{
"3k4/8/8/8/8/8/1K6/8 w - - 0 1",
"3k4/8/8/8/8/2B5/1K6/8 w - - 0 1",
"3k4/8/8/8/8/8/1KN5/8 w - - 0 1",
"3k4/2b5/8/8/8/2B5/1K6/8 w - - 0 1",
"3k4/3b4/8/8/8/3B4/1K6/8 w - - 0 1"
};
foreach (string drawPos in insufficient)
{
boardAPI = API.Board.CreateBoardFromFEN(drawPos);
Assert(boardAPI.IsDraw(), "Draw wrong, position is insufficient mat");
boardAPI = API.Board.CreateBoardFromFEN(FenUtility.FlipFen(drawPos));
Assert(boardAPI.IsDraw(), "Draw wrong, position is insufficient mat");
}
foreach (string winnablePos in notInsufficient)
{
boardAPI = API.Board.CreateBoardFromFEN(winnablePos);
Assert(!boardAPI.IsDraw(), "Draw wrong, position is winnable");
boardAPI = API.Board.CreateBoardFromFEN(FenUtility.FlipFen(winnablePos));
Assert(!boardAPI.IsDraw(), "Draw wrong, position is winnable");
}
}
static void MiscTest()

7
Chess-Challenge/src/Framework/Chess/Board/Board.cs
View file

@ -266,9 +266,12 @@ namespace ChessChallenge.Chess
UpdateSliderBitboards();
// Pawn moves and captures reset the fifty move counter and clear 3-fold repetition history
if (!inSearch && (movedPieceType == PieceHelper.Pawn || capturedPieceType != PieceHelper.None))
if (movedPieceType == PieceHelper.Pawn || capturedPieceType != PieceHelper.None)
{
RepetitionPositionHistory.Clear();
if (!inSearch)
{
RepetitionPositionHistory.Clear();
}
newFiftyMoveCounter = 0;
}

5
Chess-Challenge/src/Framework/Chess/Helpers/BoardHelper.cs
View file

@ -60,6 +60,11 @@
return (fileIndex + rankIndex) % 2 != 0;
}
public static bool LightSquare(int squareIndex)
{
return LightSquare(FileIndex(squareIndex), RankIndex(squareIndex));
}
public static string SquareNameFromCoordinate(int fileIndex, int rankIndex)
{
return fileNames[fileIndex] + "" + (rankIndex + 1);

14
Chess-Challenge/src/Framework/Chess/Result/Arbiter.cs
View file

@ -84,20 +84,22 @@
int numBlackKnights = board.knights[Board.BlackIndex].Count;
int numWhiteMinors = numWhiteBishops + numWhiteKnights;
int numBlackMinors = numBlackBishops + numBlackKnights;
int numMinors = numWhiteMinors + numBlackMinors;
// King v King
if (numWhiteMinors == 0 && numBlackMinors == 0)
// Lone kings or King vs King + single minor: is insuffient
if (numMinors <= 1)
{
return true;
}
// Single minor piece vs lone king
if ((numWhiteMinors == 1 && numBlackMinors == 0) || (numBlackMinors == 1 && numWhiteMinors == 0))
// Bishop vs bishop: is insufficient when bishops are same colour complex
if (numMinors == 2 && numWhiteBishops == 1 && numBlackBishops == 1)
{
return true;
bool whiteBishopIsLightSquare = BoardHelper.LightSquare(board.bishops[Board.WhiteIndex][0]);
bool blackBishopIsLightSquare = BoardHelper.LightSquare(board.bishops[Board.BlackIndex][0]);
return whiteBishopIsLightSquare == blackBishopIsLightSquare;
}
return false;