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Hanna
08-23-2016, 10:52 PM
I have matches on 23andme that are closer to me than matches I share more with. This is an example of my match list, I have a match that I share 0.18% on one segment but below the list I have matches where I share more with like 0.23% (one segment). How is this possible?

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-xfa1/t31.0-8/fr/cp0/e15/q65/14138057_568793226640105_3493651911210857314_o.jpg ?efg=eyJpIjoidCJ9

dp
08-23-2016, 11:41 PM
I have matches on 23andme that are closer to me than matches I share more with. This is an example of my match list, I have a match that I share 0.18% on one segment but below the list I have matches where I share more with like 0.23% (one segment). How is this possible?

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-xfa1/t31.0-8/fr/cp0/e15/q65/14138057_568793226640105_3493651911210857314_o.jpg ?efg=eyJpIjoidCJ9
Not only is the total number of cMs of sharing used but the number of segments is taken into account.
I have had better luck figuring out how I am kin to people that match me on high-numbered short chromosomes than low-numbered long ones.
A month ago I read that there is basically an equal input from all your maternal grandparents on your maternal copy of chromosomes [paternal can be biased]. That means that copy contains info from a minimum of 4 ancestors. If someone matches me for around 1/4 of a short chromosome I try to contact them.
For example: [My mother does not match this match here] Our genealogical match is one of my paternal great-grandmother was half-sisters (and 1st cousin) to one of this match's great-grandfather's. [I am her closest match on GEDmatch & FTDNA]
11149
dp :-)

Hanna
08-24-2016, 04:55 PM
I put into consideration the number of segments. If you look at my list I have a match at the top whom I share 0.18 cMs and a bit below him a match sharing 0.23cM, both one segment and both are big probably paternal matches.

dp
08-26-2016, 04:07 PM
I find it unlikely that they can call a 3rd cousin relationship exactly. See stats below.
Also I noticed they had a 3rd - 6th range. 4th cousins can be 0cM sharing so I don't see a basis for anything further than 4th not being listed as 3RD to DISTANT. For that matter, I cousin of mine told me that she didn't match one of her 3rd cousins.
I got these autosomal stats off ISOGG Wiki last year:

4th, 3rd 2R, 1/2 3 1R0-54
3rd 1R, 1/2 30-99
3rd, 2nd 2R, 1/2 2 1R, double 1/2 third16-111
2nd 1R, 1/2 2, 1/2 1st 2R19-197
2nd, 1st 2R, 1/2 1st 1R86-426
1st 1R, 1/2 1st220-638
1st548-1139

Sorry for all the categories. I have a lot of 1/2 cousins, and (x) Removed to keep straight :-)
dp

This is what is on the ISOGG side currently:
11186
Mmmm. An uncle and me match for 2106cM (at GEDmatch). I wonder if I drop the thresholds would they up to 2150.
EDIT: Oh well, dropped to 4 cM like on the ISOGG page. Came to: 2,132.3 CM.