public void move(int ax, int ay, int bx, int by) {
		char t = this.b[ax][ay].toString().charAt(1);
		boolean c = this.b[ax][ay].getColor();
		this.b[ax][ay] = new Blank(true);
		switch (t) {
			case 'P':
				this.b[bx][by] = new Pawn(c);
				break;
			case 'R':
				this.b[bx][by] = new Rook(c);
				break;
			case 'N':
				this.b[bx][by] = new Knight(c);
				break;
			case 'B':
				this.b[bx][by] = new Bishop(c);
				break;
			case 'K':
				this.b[bx][by] = new King(c);
				break;
			case 'Q':
				this.b[bx][by] = new Queen(c);
				break;
		}

	}