public bool IsRoquePossible(bool firstRook, ChessGame game)
{
ChessKing king = Figures.OfType <ChessKing>().First();
if (!king.IsRoquePossible())
{
return(false);
}
List <ChessRook> rooks = Figures.OfType <ChessRook>().ToList();
ChessRook rook = firstRook
? rooks.FirstOrDefault(r => r.CurrentField.Column == 'A')
: rooks.FirstOrDefault(r => r.CurrentField.Column == 'H');
if (rook == null)
{
return(false);
}
if (!rook.IsRoquePossible())
{
return(false);
}
int row = Color == Color.WHITE ? 1 : 8;
if (game.IsFieldUnderAttack(Color, row, 'E'))
{
return(false);
}
List <ChessField> fieldsBetween = new List <ChessField>();
if (firstRook)
{
fieldsBetween.Add(game.Board.GetField(row, 'B'));
fieldsBetween.Add(game.Board.GetField(row, 'C'));
fieldsBetween.Add(game.Board.GetField(row, 'D'));
}
else
{
fieldsBetween.Add(game.Board.GetField(row, 'F'));
fieldsBetween.Add(game.Board.GetField(row, 'G'));
}
foreach (ChessField field in fieldsBetween)
{
if (field.Status != FieldStatus.EMPTY)
{
return(false);
}
if (game.IsFieldUnderAttack(Color, field.Row, field.Column))
{
return(false);
}
}
return(true);
}
public bool Check()
{
ChessPlayer enemy = CurrentPlayer == WhitePlayer ? BlackPlayer : WhitePlayer;
Color enemyColor = CurrentPlayer == WhitePlayer ? Color.BLACK : Color.WHITE;
ChessKing enemyKing = enemy.Figures.OfType <ChessKing>().First();
ChessField enemyKingField = enemyKing.CurrentField;
if (IsFieldUnderAttack(enemyColor, enemyKingField.Row, enemyKingField.Column))
{
return(true);
}
return(false);
}
public ChessPlayer(Color color, ChessBoard board)
{
Color = color;
Figures = new ChessFigure[16];
Figures[0] = new ChessKing(color, board);
Figures[1] = new ChessQueen(color, board);
Figures[2] = new ChessBishop(color, board, true);
Figures[3] = new ChessBishop(color, board, false);
Figures[4] = new ChessKnight(color, board, true);
Figures[5] = new ChessKnight(color, board, false);
Figures[6] = new ChessRook(color, board, true);
Figures[7] = new ChessRook(color, board, false);
Figures[8] = new ChessPawn(color, board, 'A');
Figures[9] = new ChessPawn(color, board, 'B');
Figures[10] = new ChessPawn(color, board, 'C');
Figures[11] = new ChessPawn(color, board, 'D');
Figures[12] = new ChessPawn(color, board, 'E');
Figures[13] = new ChessPawn(color, board, 'F');
Figures[14] = new ChessPawn(color, board, 'G');
Figures[15] = new ChessPawn(color, board, 'H');
}
public bool CheckMate()
{
bool isMate = false;
ChessPlayer enemy = CurrentPlayer == WhitePlayer ? BlackPlayer : WhitePlayer;
Color enemyColor = CurrentPlayer == WhitePlayer ? Color.BLACK : Color.WHITE;
ChessKing enemyKing = enemy.Figures.OfType <ChessKing>().First();
ChessField enemyKingField = enemyKing.CurrentField;
if (IsFieldUnderAttack(enemyColor, enemyKingField.Row, enemyKingField.Column))
{
isMate = true;
//1. King can move to other field
List <ChessField> kingToMoveFields = enemyKing.FieldsToMove;
foreach (ChessField field in kingToMoveFields)
{
if (!IsFieldUnderAttack(enemyColor, field.Row, field.Column))
{
isMate = false;
break;
}
}
//2. Attacking figures can be killed
List <ChessFigure> currentFigures = CurrentPlayer.Figures.Where(f => !f.IsKilled).ToList();
List <ChessFigure> attackingFigures = new List <ChessFigure>();
foreach (ChessFigure figure in currentFigures)
{
if (figure.FieldsToMove.Contains(enemyKingField))
{
attackingFigures.Add(figure);
}
}
List <ChessFigure> attackingToKill = new List <ChessFigure>();
foreach (ChessFigure attackingFigure in attackingFigures)
{
foreach (ChessFigure defendingFigure in enemy.Figures.Where(f => !f.IsKilled))
{
if (defendingFigure.FieldsToMove.Contains(attackingFigure.CurrentField))
{
attackingToKill.Add(attackingFigure);
}
}
}
foreach (ChessFigure figure in attackingToKill)
{
attackingFigures.Remove(figure);
}
//3. It's possible to move figure between attacking figure and king
foreach (ChessFigure attackingFigure in attackingFigures)
{
List <ChessField> fieldsBetween = new List <ChessField>();
if (attackingFigure is ChessRook || attackingFigure is ChessQueen)
{
if (enemyKingField.Column == attackingFigure.CurrentField.Column)
{
int minRow = Math.Min(enemyKingField.Row, attackingFigure.CurrentField.Row);
int maxRow = Math.Max(enemyKingField.Row, attackingFigure.CurrentField.Row);
for (int i = minRow + 1; i < maxRow; i++)
{
fieldsBetween.Add(Board.GetField(i, enemyKingField.Column));
}
}
else if (enemyKingField.Row == attackingFigure.CurrentField.Row)
{
char minColumn = (char)Math.Min(enemyKingField.Column, attackingFigure.CurrentField.Column);
char maxColumn = (char)Math.Max(enemyKingField.Column, attackingFigure.CurrentField.Column);
for (int i = minColumn + 1; i < maxColumn; i++)
{
fieldsBetween.Add(Board.GetField(enemyKingField.Row, (char)i));
}
}
}
if (attackingFigure is ChessBishop || attackingFigure is ChessQueen)
{
int minRow = Math.Min(enemyKingField.Row, attackingFigure.CurrentField.Row);
int maxRow = Math.Max(enemyKingField.Row, attackingFigure.CurrentField.Row);
char minColumn = (char)Math.Min(enemyKingField.Column, attackingFigure.CurrentField.Column);
char maxColumn = (char)Math.Max(enemyKingField.Column, attackingFigure.CurrentField.Column);
if ((enemyKingField.Row < attackingFigure.CurrentField.Row &&
enemyKingField.Column < attackingFigure.CurrentField.Column) ||
(enemyKingField.Row > attackingFigure.CurrentField.Row &&
enemyKingField.Column > attackingFigure.CurrentField.Column))
{
for (int i = minRow + 1, j = minColumn + 1; i < maxRow && j < maxColumn; i++, j++)
{
fieldsBetween.Add(Board.GetField(i, (char)j));
}
}
else
{
for (int i = maxRow - 1, j = minColumn + 1; i > minRow && j < maxColumn; i--, j++)
{
fieldsBetween.Add(Board.GetField(i, (char)j));
}
}
}
List <ChessFigure> enemyFigures = enemy.Figures.Where(f => f != enemyKing).ToList();
foreach (ChessField field in fieldsBetween)
{
foreach (var figure in enemyFigures)
{
if (figure.FieldsToMove.Contains(field))
{
attackingFigures.Remove(attackingFigure);
}
}
}
}
if (attackingFigures.Count < 1)
{
isMate = false;
}
}
return(isMate);
}
