public bool IsCheck(Figure fig, int y, int x)
{
Figure temp = GetFigure(y, x);
int tempy = fig.GetY();
int tempx = fig.GetX();
Move(fig, y, x);
if (fig.GetColor() == Colors.BLACK && IsUnderAttack(this.black_king.GetY(), this.black_king.GetX(), Colors.BLACK) > 0 || (fig.GetColor() == Colors.WHITE && IsUnderAttack(this.white_king.GetY(), this.white_king.GetX(), Colors.WHITE) > 0))
{
Move(fig, tempy, tempx);
AddFigure(temp);
return(true);
}
Move(fig, tempy, tempx);
AddFigure(temp);
return(false);
}
public bool IsCheckMate()
{
List <Figure> attack_figures = new List <Figure>();
int count_attack;
Figure king;
if (Step == Colors.BLACK)
{
count_attack = IsUnderAttack(this.black_king.GetY(), this.black_king.GetX(), Colors.BLACK, attack_figures);
king = black_king;
}
else
{
count_attack = IsUnderAttack(this.white_king.GetY(), this.white_king.GetX(), Colors.WHITE, attack_figures);
king = white_king;
}
if (count_attack == 0)
{
return(false);
}
else if (count_attack == 1 && attack_figures[0].GetType() != typeof(Knight))
{
Figure figure = attack_figures[0];
if (figure.GetY() == king.GetY())
{
int start_i = Math.Min(figure.GetX(), king.GetX());
int end_i = Math.Max(figure.GetX(), king.GetX());
for (int i = start_i; i < end_i; i++)
{
if (king.GetColor() == Colors.BLACK)
{
if (IsUnderAttack(king.GetY(), i, Colors.WHITE) > 0)
{
return(false);
}
}
else if (IsUnderAttack(king.GetY(), i, Colors.BLACK) > 0)
{
return(false);
}
}
}
else if (figure.GetX() == king.GetX())
{
int start_i = Math.Min(figure.GetY(), king.GetY());
int end_i = Math.Max(figure.GetY(), king.GetY());
for (int i = start_i; i < end_i; i++)
{
if (king.GetColor() == Colors.BLACK)
{
if (IsUnderAttack(i, king.GetX(), Colors.WHITE) > 0)
{
return(false);
}
}
else if (IsUnderAttack(i, king.GetX(), Colors.BLACK) > 0)
{
return(false);
}
}
}
else
{
int razn_x = king.GetX() - figure.GetX();
int razn_y = king.GetY() - figure.GetY();
for (int i = 1; i < Math.Abs(razn_x); i++)
{
if (king.GetColor() == Colors.BLACK)
{
if (IsUnderAttack(king.GetY() - i * (razn_y / Math.Abs(razn_y)), king.GetX() - i * (razn_x / Math.Abs(razn_x)), Colors.WHITE) > 0)
{
return(false);
}
}
else if (IsUnderAttack(king.GetY() - i * (razn_y / Math.Abs(razn_y)), king.GetX() - i * (razn_x / Math.Abs(razn_x)), Colors.BLACK) > 0)
{
return(false);
}
}
}
}
for (int i = -1; i < 2; i++)
{
for (int j = -1; j < 2; j++)
{
if (king.IsCanMove(king.GetY() + i, king.GetX() + j) > 0 && !IsCheck(king, king.GetY() + i, king.GetX() + j))
{
return(false);
}
}
}
return(true);
}