I find the scenarios presented by the ICW feature and the CB difficult to comprehend. I wish I knew what questions to ask my matches (i.e., which of the matches they are or are nor matching). For example, My mother matches A, B, C, D and E on an overlapping segment of chr 20. All are ICW each other, except D is not ICW E and E is not ICW D. All I can glean from this is that my mother is matching D and E on different sides of chr 20. Do I have enough information to tentatively assign the others to a certain side? If not, do I need to be asking each one where they match others on this stretch of chr 20? What is the minimally sufficient information I should request of each of them? Thanks, Barton -----Original Message----- From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Tim Janzen Sent: Sunday, September 29, 2013 10:43 AM To: autosomal-dna@rootsweb.com Subject: Re: [AUTOSOMAL-DNA] ICW - inconsistencies Dear Barton, One of the most significant deficiencies in Family Finder is the fact that you can't compare your matches against each other to see which of them match each other. 23andMe allowed their customers to do this over a year ago and it has been a huge help for genetic genealogists who are doing chromosome mapping. FTDNA should follow suit. The best you can do under the circumstances with Family Finder is to ask each of your matches on a specific segment to check their match list to see if the other people who match you on that particular segment also match them. If you have that information then you can assign one group to one chromosome and the other group to the opposite chromosome. There will still likely be some people that you can't assign to one chromosome or the other because they don't match anyone else that you match on that segment. At least some of those matches will be IBS. I agree with Melissa Robards that it would be reasonable to ask all of your Family Finder matches to also upload their data to GEDmatch so you can run comparisons between various matches there. However, some people won't be willing to upload their data to GEDmatch. I frankly don't find the ICW feature in Family Finder very helpful because of the fact that I have already mapped my close relatives' chromosomes using data from first, second and third cousins who have already done Family Finder or have been tested elsewhere. Sincerely, Tim Janzen -----Original Message----- From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Barton Lewis Sent: Sunday, September 29, 2013 9:25 AM To: autosomal-dna@rootsweb.com Subject: [AUTOSOMAL-DNA] ICW - inconsistencies I have a situation where ten people are overlapping on a segment from 21995381-40581772 on chr 8. There is no rhyme or reason as to who is ICW with who in that there are different permutations for many of the matches in terms of who they are ICW, such that I cannot tell who is on one side of the chr and who is on the other. There is uniformity for some of them in terms of who they are ICW, but not for others and certainly not as a whole, so that I cannot neatly assign some of the ten to one side and the others to the other. Does the ICW feature fail to pick up matches at a certain level? The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or 15.85 cM. Thanks, Barton ______________________________ For answers to Frequently Asked Questions about mailing lists, please see: http://dgmweb.net/MailingListFAQs.html ------------------------------- To unsubscribe from the list, please send an email to AUTOSOMAL-DNA-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message