/// <summary>
/// Find all possible Moves of a Chesspiece in position of a State but not check the Chess Rule
/// </summary>
/// <param name="arrState"></param>
/// <param name="pos"></param>
/// <returns></returns>
public static ArrayList FindAllPosibleMovesNotRule(ChessState[,] arrState, Point pos, eChessSide ownside)
{
ArrayList arrMove = new ArrayList();
switch (arrState[pos.X, pos.Y].Type)
{
case eChessPieceType.Bishop:
arrMove = ChessPiece_Bishop.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.King:
arrMove = ChessPiece_King.FindAllPosibleMoves(arrState, pos, ownside);
break;
case eChessPieceType.Knight:
arrMove = ChessPiece_Knight.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.Pawn:
arrMove = ChessPiece_Pawn.FindAllPosibleMoves(arrState, pos, ownside);
break;
case eChessPieceType.Queen:
arrMove = ChessPiece_Queen.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.Rook:
arrMove = ChessPiece_Rook.FindAllPosibleMoves(arrState, pos);
break;
}
return(arrMove);
}
/// <summary>
/// Find all possible Moves of a Chesspiece in position of a State
/// </summary>
/// <param name="arrState"></param>
/// <param name="pos"></param>
/// <returns></returns>
public static ArrayList FindAllPosibleMoves(ChessState[,] arrState, Point pos, eChessSide ownside)
{
ArrayList arrMove = new ArrayList();
switch (arrState[pos.X, pos.Y].Type)
{
case eChessPieceType.Bishop:
arrMove = ChessPiece_Bishop.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.King:
arrMove = ChessPiece_King.FindAllPosibleMoves(arrState, pos, ownside);
break;
case eChessPieceType.Knight:
arrMove = ChessPiece_Knight.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.Pawn:
arrMove = ChessPiece_Pawn.FindAllPosibleMoves(arrState, pos, ownside);
break;
case eChessPieceType.Queen:
arrMove = ChessPiece_Queen.FindAllPosibleMoves(arrState, pos);
break;
case eChessPieceType.Rook:
arrMove = ChessPiece_Rook.FindAllPosibleMoves(arrState, pos);
break;
}
if (arrMove.Count == 0)
{
return(arrMove);
}
ArrayList arr_CanMoves = new ArrayList();
ChessState[,] NewState = new ChessState[10, 10];
for (int i = 0; i <= 9; i++)
{
for (int j = 0; j <= 9; j++)
{
NewState[i, j] = new ChessState(arrState[i, j].Type, arrState[i, j].Side, arrState[i, j].Moves);
}
}
foreach (ChessMove m in arrMove)
{
//If one move that makes king will be checked -> remove
PredictMove(NewState, m);
if (Checked(NewState, arrState[pos.X, pos.Y].Side, ownside) == false)
{
arr_CanMoves.Add(m);
}
UnPredictMove(NewState, m);
}
return(arr_CanMoves);
}
public static ArrayList FindWhoCheckAndKingPosition(ChessState[,] arrState, eChessSide side, eChessSide ownside)
{
ArrayList WhoCheck = new ArrayList();
ArrayList cantMoves = new ArrayList();
int i, j;
for (i = 1; i < 9; i++)
{
for (j = 1; j < 9; j++)
{
if (arrState[i, j].Side != side)
{
if (arrState[i, j].Type == eChessPieceType.Bishop)
{
cantMoves = ChessPiece_Bishop.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.King)
{
cantMoves = ChessPiece_King.FindAllPosibleMoves(arrState, new Point(i, j), ownside);
}
else if (arrState[i, j].Type == eChessPieceType.Knight)
{
cantMoves = ChessPiece_Knight.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Pawn)
{
cantMoves = ChessPiece_Pawn.FindAllPosibleMoves(arrState, new Point(i, j), ownside);
}
else if (arrState[i, j].Type == eChessPieceType.Queen)
{
cantMoves = ChessPiece_Queen.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Rook)
{
cantMoves = ChessPiece_Rook.FindAllPosibleMoves(arrState, new Point(i, j));
}
foreach (ChessMove p in cantMoves)
{
if (arrState[p.MoveTo.X, p.MoveTo.Y].Side == side && arrState[p.MoveTo.X, p.MoveTo.Y].Type == eChessPieceType.King)
{
WhoCheck.Add(p);
break;
}
}
}
}
}
return(WhoCheck);
}
/// <summary>
/// Check Is that one side is checked?
/// </summary>
/// <param name="arrState"></param>
/// <param name="side"></param>
/// <returns></returns>
public static bool Checked(ChessState[,] arrState, eChessSide side, eChessSide ownside)
{
int i, j;
ArrayList cantMoves = new ArrayList();
for (i = 1; i < 9; i++)
{
for (j = 1; j < 9; j++)
{
if (arrState[i, j].Side != side)
{
if (arrState[i, j].Type == eChessPieceType.Bishop)
{
cantMoves = ChessPiece_Bishop.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.King)
{
cantMoves = ChessPiece_King.FindAllPosibleMoves(arrState, new Point(i, j), ownside);
}
else if (arrState[i, j].Type == eChessPieceType.Knight)
{
cantMoves = ChessPiece_Knight.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Pawn)
{
cantMoves = ChessPiece_Pawn.FindAllPosibleMoves(arrState, new Point(i, j), ownside);
}
else if (arrState[i, j].Type == eChessPieceType.Queen)
{
cantMoves = ChessPiece_Queen.FindAllPosibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Rook)
{
cantMoves = ChessPiece_Rook.FindAllPosibleMoves(arrState, new Point(i, j));
}
foreach (ChessMove p in cantMoves)
{
if (arrState[p.MoveTo.X, p.MoveTo.Y].Side == side && arrState[p.MoveTo.X, p.MoveTo.Y].Type == eChessPieceType.King)
{
return(true);
}
}
}
}
}
return(false);
}
/// <summary>
/// Evaluate value of ChessBoard for a side
/// </summary>
/// <param name="arrState"></param>
/// <param name="myside"></param>
/// <returns></returns>
private static int EvaluateChessBoard(ChessState[,] arrState, eChessSide myside)
{
int value = 0;
eChessSide opSide = eChessSide.Black;
if (myside == eChessSide.Black)
{
opSide = eChessSide.White;
}
bool isGonnaDraw = true;
bool isEndGame = IsEndGame(arrState, myside);
int countMyKnight = 0;
int countOpKnight = 0;
bool myWhiteBishopAvailable = false;
bool myBlackBishopAvailable = false;
bool opWhiteBishopAvailable = false;
bool opBlackBishopAvailable = false;
int i, j;
for (i = 1; i <= 8; i++)
{
for (j = 1; j <= 8; j++)
{
if (arrState[i, j].Type > 0)
{
if (arrState[i, j].Side == myside)
{
switch (arrState[i, j].Type)
{
case eChessPieceType.Bishop:
value += (int)PieceValue.Bishop;
value += ChessPiece_Bishop.GetPositionValue(new Point(i, j), myside, _ownSide);
if ((i + j) % 2 == 0)
{
myBlackBishopAvailable = true;
}
else
{
myWhiteBishopAvailable = true;
}
break;
case eChessPieceType.Knight:
value += (int)PieceValue.Knight;
value += ChessPiece_Knight.GetPositionValue(new Point(i, j), myside, _ownSide);
countMyKnight += 1;
break;
case eChessPieceType.Pawn:
value += (int)PieceValue.Pawn;
value += ChessPiece_Pawn.GetPositionValue(new Point(i, j), myside, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.Queen:
value += (int)PieceValue.Queen;
value += ChessPiece_Queen.GetPositionValue(new Point(i, j), myside, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.Rook:
value += (int)PieceValue.Rook;
value += ChessPiece_Rook.GetPositionValue(new Point(i, j), myside, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.King:
value += (int)PieceValue.King;
value += ChessPiece_King.GetPositionValue(new Point(i, j), myside, isEndGame, _ownSide);
break;
}
}
else
{
switch (arrState[i, j].Type)
{
case eChessPieceType.Bishop:
value -= (int)PieceValue.Bishop;
value -= ChessPiece_Bishop.GetPositionValue(new Point(i, j), opSide, _ownSide);
if ((i + j) % 2 == 0)
{
opBlackBishopAvailable = true;
}
else
{
opWhiteBishopAvailable = true;
}
break;
case eChessPieceType.Knight:
value -= (int)PieceValue.Knight;
value -= ChessPiece_Knight.GetPositionValue(new Point(i, j), opSide, _ownSide);
countOpKnight += 1;
break;
case eChessPieceType.Pawn:
value -= (int)PieceValue.Pawn;
value -= ChessPiece_Pawn.GetPositionValue(new Point(i, j), opSide, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.Queen:
value -= (int)PieceValue.Queen;
value -= ChessPiece_Queen.GetPositionValue(new Point(i, j), opSide, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.Rook:
value -= (int)PieceValue.Rook;
value -= ChessPiece_Rook.GetPositionValue(new Point(i, j), opSide, _ownSide);
isGonnaDraw = false;
break;
case eChessPieceType.King:
value -= (int)PieceValue.King;
value -= ChessPiece_King.GetPositionValue(new Point(i, j), opSide, isEndGame, _ownSide);
break;
}
}
}
}
}
/* 2 Bishop is useful for us
* Bishop is more useful than knight in the end
*
* The game is not draw when
* - 1 of each player has Pawn or Rook or Queen
* - 1 of each player has 2 Knight or 2 Bishop in different color
* - 1 of each player has 1 Knight and 1 Bishop
*/
if (countMyKnight > 1 || countOpKnight > 1)
{
isGonnaDraw = false;
}
if ((countMyKnight >= 1 && (myBlackBishopAvailable || myWhiteBishopAvailable)) || (countOpKnight >= 1 && (opBlackBishopAvailable || opWhiteBishopAvailable)))
{
isGonnaDraw = false;
}
if (myBlackBishopAvailable && myWhiteBishopAvailable)
{
value += 10;
isGonnaDraw = false;
}
if (opWhiteBishopAvailable && opBlackBishopAvailable)
{
value -= 10;
isGonnaDraw = false;
}
if ((opBlackBishopAvailable && myWhiteBishopAvailable) || (opWhiteBishopAvailable && myBlackBishopAvailable))
{
isGonnaDraw = false;
}
if (isGonnaDraw)
{
return(0);
}
if (isEndGame)
{
if (countMyKnight > 1)
{
value -= 10;
}
if (countOpKnight > 1)
{
value += 10;
}
if (myBlackBishopAvailable || myWhiteBishopAvailable)
{
value += 10;
}
if (opBlackBishopAvailable || opWhiteBishopAvailable)
{
value -= 10;
}
}
return(value);
}
/// <summary>
/// Find all Possible Moves of a King of a side
/// </summary>
/// <param name="side"></param>
/// <returns></returns>
public static bool[,] FindAllKingCanMove(ChessState[,] arrState, eChessSide side, eChessSide ownside)
{
bool[,] Result = new bool[10, 10];
ArrayList cantMoves = new ArrayList();
int i, j;
//Init Result
for (i = 1; i < 9; i++)
{
for (j = 1; j < 9; j++)
{
Result[i, j] = true;
}
}
for (i = 0; i <= 9; i++)
{
Result[0, i] = false;
Result[i, 0] = false;
Result[9, i] = false;
Result[i, 9] = false;
}
for (i = 1; i < 9; i++)
{
for (j = 1; j < 9; j++)
{
if (arrState[i, j].Side != side)
{
if (arrState[i, j].Type == eChessPieceType.Bishop)
{
cantMoves = ChessPiece_Bishop.FindAllImposibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.King)
{
cantMoves = ChessPiece_King.FindAllImposibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Knight)
{
cantMoves = ChessPiece_Knight.FindAllImposibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Pawn)
{
cantMoves = ChessPiece_Pawn.FindAllImposibleMoves(arrState, new Point(i, j), ownside);
}
else if (arrState[i, j].Type == eChessPieceType.Queen)
{
cantMoves = ChessPiece_Queen.FindAllImposibleMoves(arrState, new Point(i, j));
}
else if (arrState[i, j].Type == eChessPieceType.Rook)
{
cantMoves = ChessPiece_Rook.FindAllImposibleMoves(arrState, new Point(i, j));
}
foreach (ChessMove p in cantMoves)
{
Result[p.MoveTo.X, p.MoveTo.Y] = false;
}
}
}
}
return(Result);
}