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fpchess: Implements the knight movement and rewrites the queen movement
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1559 8e941d3f-bd1b-0410-a28a-d453659cc2b4
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sekelsenmat
@ -292,9 +292,25 @@ begin
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end;
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end;
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{
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The knight has 8 possible destinations only:
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[X][ ][X]
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[X][ ][ ][ ][X]
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[ ][ ][K][ ][ ]
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[X][ ][ ][ ][X]
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[X] [X]
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}
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function TChessGame.ValidateKnightMove(AFrom, ATo: TPoint): Boolean;
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begin
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Result := True;
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Result := (AFrom.X = ATo.X + 1) and (AFrom.Y + 2 = ATo.Y); // upper left corner
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Result := Result or ((AFrom.X = ATo.X + 2) and (AFrom.Y + 1 = ATo.Y)); // upper left corner
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Result := Result or ((AFrom.X = ATo.X + 2) and (AFrom.Y - 1 = ATo.Y)); // lower left corner
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Result := Result or ((AFrom.X = ATo.X + 1) and (AFrom.Y - 2 = ATo.Y)); // lower left corner
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Result := Result or ((AFrom.X = ATo.X - 1) and (AFrom.Y - 2 = ATo.Y)); // lower right corner
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Result := Result or ((AFrom.X = ATo.X - 2) and (AFrom.Y - 1 = ATo.Y)); // lower right corner
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Result := Result or ((AFrom.X = ATo.X - 2) and (AFrom.Y + 1 = ATo.Y)); // upper right corner
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Result := Result or ((AFrom.X = ATo.X - 1) and (AFrom.Y + 2 = ATo.Y)); // upper right corner
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end;
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function TChessGame.ValidateBishopMove(AFrom, ATo: TPoint): Boolean;
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@ -458,309 +474,22 @@ begin
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end;
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ShowMessage(mensagem);}
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result := (AttackedSquares[Ato.X][Ato.y]);
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result := (AttackedSquares[Ato.X][Ato.y]);
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end;
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function TChessGame.ValidateQueenMove(AFrom, ATo: TPoint): Boolean;
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var
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AttackedSquares : BitBoard;
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i,j : Integer;
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x,y,l : integer; //l it's the same of the y or x, just an index.
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haveCaptured: boolean = false; //already have captured a piece
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willBeACapture : boolean = false;// the movement will be a capture
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validMove : boolean = false; //if the piece in the 'to' square is not of the same color of the player
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mensagem : String;
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begin
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for i:=1 to 8 do // initialize the bitboard of attacked pieces.
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for j:=1 to 8 do
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AttackedSquares[i][j]:= false;
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//////////////////////////////////////UP////////////////////////////////////////
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l := AFrom.y+1;
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if (l<=8) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[AFrom.x][l] in BlackPieces);
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validMove:= not (Board[AFrom.x][l] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[AFrom.x][l] in WhitePieces);
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validMove:=not (Board[AFrom.x][l] in BlackPieces)
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end;
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end
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else
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l :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (l <= 8) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[AFrom.x][l] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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l := l+1;
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if (l<=8) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[AFrom.x][l] in BlackPieces);
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validMove:= not (Board[AFrom.x][l] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[AFrom.x][l] in WhitePieces);
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validMove:=not (Board[AFrom.x][l] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END UP///////////////////////////////////////
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///////////////////////////////////DOWN/////////////////////////////////////////
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haveCaptured:=false;
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l := AFrom.y-1;
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if (l>=1) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[AFrom.x][l] in BlackPieces);
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validMove:= not (Board[AFrom.x][l] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[AFrom.x][l] in WhitePieces);
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validMove:=not (Board[AFrom.x][l] in BlackPieces)
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end;
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end
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else
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l :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (l >= 1) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[AFrom.x][l] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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l := l-1;
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if (l>=1) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[AFrom.x][l] in BlackPieces);
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validMove:= not (Board[AFrom.x][l] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[AFrom.x][l] in WhitePieces);
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validMove:=not (Board[AFrom.x][l] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////DOWN/////////////////////////////////////////
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////////////////////////////////////RIGHT////////////////////////////////////////
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haveCaptured:=false;
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l := AFrom.x+1;
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if (l<=8) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[l][AFrom.y] in BlackPieces);
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validMove:= not (Board[l][AFrom.y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[l][AFrom.y] in WhitePieces);
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validMove:=not (Board[l][AFrom.y] in BlackPieces)
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end;
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end
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else
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l :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (l <= 8) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[l][AFrom.y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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l := l+1;
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if (l<=8) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[l][AFrom.y] in BlackPieces);
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validMove:= not (Board[l][AFrom.y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[l][AFrom.y] in WhitePieces);
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validMove:=not (Board[l][AFrom.y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END RIGHT////////////////////////////////////
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///////////////////////////////////LEFT/////////////////////////////////////////
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haveCaptured:=false;
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l := AFrom.x-1;
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if (l>=1) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[l][AFrom.y] in BlackPieces);
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validMove:= not (Board[l][AFrom.y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[l][AFrom.y] in WhitePieces);
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validMove:=not (Board[l][AFrom.y] in BlackPieces)
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end;
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end
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else
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l :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (l >= 1) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[l][AFrom.y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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l := l-1;
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if (l>=1) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[l][AFrom.y] in BlackPieces);
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validMove:= not (Board[l][AFrom.y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[l][AFrom.y] in WhitePieces);
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validMove:=not (Board[l][AFrom.y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END LEFT/////////////////////////////////////
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//////////////////////////////////////UP LEFT///////////////////////////////////
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y := AFrom.y+1;
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x := AFrom.x-1;
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if (x>=1) and (y<=8) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end
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else
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y :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (x>=1) and (y <= 8) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[x][y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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y := y+1;
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x := x-1;
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if (x>=1) and (y<=8) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END UP LEFT//////////////////////////////////
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//////////////////////////////////////UP RIGHT//////////////////////////////////
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y := AFrom.y+1;
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x := AFrom.x+1;
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willBeACapture:=false;
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if (x<=8) and (y<=8) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end
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else
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y :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (x<=8) and (y <= 8) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[x][y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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y := y+1;
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x := x+1;
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if (x<=8) and (y<=8) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END UP RIGHT/////////////////////////////////
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//////////////////////////////////////DOWN LEFT/////////////////////////////////
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y := AFrom.y-1;
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x := AFrom.x-1;
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willBeACapture:=false;
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if (x>=1) and (y>=1) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end
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else
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y :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (x>=1) and (y >= 1) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[x][y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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y := y-1;
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x := x-1;
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if (x>=1) and (y>=1) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END DOWN LEFT////////////////////////////////
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//////////////////////////////////////DOWN RIGHT////////////////////////////////
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y := AFrom.y-1;
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x := AFrom.x+1;
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willBeACapture:=false;
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if (x<=8) and (y>=1) then begin
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end
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else
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y :=0; // if it is in the border of the board, put 0 in l to skip the while below.
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haveCaptured:=false;
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while ( (x<=8) and (y >= 1) and (validMove) and (not haveCaptured)) do begin
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AttackedSquares[x][y] := true;
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if (willBeACapture) then
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haveCaptured:=true;
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y := y-1;
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x := x+1;
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if (x<=8) and (y>=1) then begin //again to not have an 'out of bounds' error
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if (CurrentPlayerIsWhite) then begin
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willBeACapture:= (Board[x][y] in BlackPieces);
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validMove:= not (Board[x][y] in WhitePieces);
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end
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else begin
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willBeACapture:=(Board[x][y] in WhitePieces);
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validMove:=not (Board[x][y] in BlackPieces)
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end;
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end;
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end;
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///////////////////////////////////END DOWN RIGHT///////////////////////////////
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for i:=1 to 8 do begin //To show the bitboard
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for j:=1 to 8 do
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mensagem := mensagem + BoolToStr(AttackedSquares[i][j],'1','0') + ' ';
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mensagem := mensagem + #13;
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end;
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//ShowMessage(mensagem);
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result:= (AttackedSquares[Ato.X][Ato.y]);
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Result := ValidateRookMove(AFrom, ATo) or ValidateBishopMove(AFrom, ATo);
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end;
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function TChessGame.ValidateKingMove(AFrom, ATo: TPoint): Boolean;
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begin
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Result := False;
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// Verify the possibility of a Roque
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// ToDo
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// Simple move
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if (AFrom.X > ATo.X + 1) or (AFrom.X + 1 < ATo.X) then Exit;
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if (AFrom.Y > ATo.Y + 1) or (AFrom.Y + 1 < ATo.Y) then Exit;
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Result := True;
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