private int[] exploreNextMove() {
		for (int col = 0; col < 7; col++) {
			if (board.validateStep(col)) {
				int row = board.availableSpace(col);
				if (board.checkConnectFour(player1, row, col)
						|| board.checkConnectFour(player2, row, col)) {
					return new int[] { row, col };
				}
			}
		}
		return new int[] { -1, -1 };
	}