public String toString() {
		// Fourni les codes couleur et l'indication des familles
		String s = "";
		String s1;
		String s2;
		for (int i = 0; i < 8; i++) {
			s1 = "";
			s2 = "";
			for (int j = 0; j < 8; j++) {
				s1 += matrix[i][j] + " ";
				s2 += (matrixb[i][j] ? 1 : 0) + " ";
			}
			s += s1 + "            " + s2 + '\n';
		}
		return s;
	}