#include <iostream>
using namespace std;
 
class Board; 
class Piece
{
public:
  Piece(bool w, string t) : _type(t),_isWhite(w) {}
  Piece() {}
  Piece(Piece & other) : _type(other._type), _isWhite(other._isWhite) {}
  bool isChass(bool, Board*) { return false; }
  virtual int move(int x_src, int y_src, int x_dst, int y_dst, Board*   board)=0;
  virtual ~Piece() {}
  bool get_isWhite() {return _isWhite;}
  string get_type() {return _type; }
  Piece& operator= (const Piece & other) { _type=other._type; _isWhite=other._isWhite;}
  bool inRange(int, int) { return true; }
 
protected:
  bool _isWhite;
  string _type;
};
 
class Blank : public Piece {
public: 
    Blank() {}
    int move(int x_src, int y_src, int x_dst, int y_dst, Board*   board) override {
       return 0; 
    }
};
 
class Board
{
public:
  Board();
  Board(const Board& other);
  ~Board();
  Board& operator=(const Board &other);
  Piece& getPiece(int i, int j){ return *_board[i][j]; }
  void game();
  void deletePiece(int x, int y) { delete _board[x][y]; }
  void allocateBlankPiece(int x, int y) { _board[x][y] = new Blank(); }
 
private:
  Piece*** _board;
  bool _isWhiteTurn;
};
 
int main() {
	// your code goes here
	return 0;
}