Casey Well... It's hard to guarantee anything in this business. I don't usually use any segment below 5cM, unless it's a known close relative - and even then I shade them in tan to warn me it might be IBS. I would really get some more Matches for what you are trying to do - 23andMe and GEDmatch. You need others to Triangulate with longer segments. To Triangulate with what you have, you need to contact all the Matches that might give you a clue. If you use 5cM segments, you need to contact those Matches. I don't think matches below 5cM have much significance in most cases. I have compared myself against many non-Matches at GEDmatch to the 1cM level and often get a dozen or so "matching" segments with them. So matching on small segments doesn't usually mean anything. Jim - Sent from my iPhone - FaceTime! On Nov 1, 2013, at 5:56 PM, Casey's Ancestors <caseysancestors@yahoo.com> wrote: > Thanks Jim! > > Match #2 has no matches (besides me) over 6cM matching our segment. My 5.0-6.5cM segment matches that triangulate with match #2 match her between 3-5.3cM - should I contact those 5 testers? I had not done that because of the segment size. > > I have a known 3rd cousin (match #3) from this line that doesn't triangulate in common with match #1. When I compare match #1 & 3 in the chromosome browser I find 3 possible matches. Each of those are about 3cM on 3 different chromosomes (ch 8, 11 & 12). One of those segments also matches #2 1.85cM. Does this have any significance in this situation? Neither match #1 or 3 will upload to gedmatch. > > Thanks again, > Casey > > > > > >