Ancestry v2c
From SNPedia
The term "v2c" is used only here in SNPedia to refer to the DNA chip that AncestryDNA appears to started using around April 2018. The header information in the corresponding raw data files still says "V2.0", and Ancestry has not made any public announcements that we are aware of about this chip, yet it clearly shows significant differences compared to the v2 chip.
One significant difference: it appears as if the "missing in/dels" problem that caused a significant fraction of v2 files to lack data for all insertion and deletion SNPs has been fixed by Ancestry, since all v2c files that we've seen contain in/del data.
