DNA Brick Wall Investigator
DNA Brick Wall Investigator
Turn your MyHeritage AutoCluster report into a research strategy. Upload the full HTML export and we calculate structural hierarchy (parent/child branches), filter out random ICW noise, and draw the visual correlation heatmap.
.html file, rename the file extension to .txt (e.g. report.txt) and upload it again. The content remains the same – iOS treats it as text and allows reading.Match Metadata
Add surnames, locations, tree information and other match metadata.
GEDCOM
Add your tree only after AutoCluster identifies an interesting cluster. GEDCOM is used for family-level evidence.
| Cluster | Score | Hierarchy / Role | Matches | Avg / Max cM | Est. MRCA Distance | Density | Fingerprint |
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DNA Academy - Quick Answers
How do I use a centimorgan (cM) calculator?
Simply enter the total centimorgan (cM) value you share with a match (e.g., 876 cM). Our calculator gives you an immediate probability list of relationships. For 876 cM, it might show 60% chance of grandparent, 30% of half-aunt/uncle, etc. This removes the guesswork when you see unfamiliar names in your match list.
What is a good centimorgan threshold for a reliable match?
Matches over 20 cM are generally considered genealogically useful. Matches under 10 cM are often “identical by chance” (IBC) and not from a recent ancestor. According to the ISOGG, we recommend focusing on matches > 50 cM for building your tree, as these are almost always valid. Test our calculator to see the probabilities.
What does "shared DNA segments" mean on my report?
A segment is a continuous stretch of DNA on a specific chromosome. Your total cM is the sum of all segments you share with a match. For example, you might share 120 cM spread across 4 segments (each on different chromosomes). Our calculator uses the total cM to determine relationship probabilities.
Can the calculator predict half-relationships (half-siblings, half-aunts)?
Yes! Our calculator includes half-relationships in its probability list. For example, 1,700 cM might show a 50% chance of grandparent and a 30% chance of half-sibling. The tool uses the latest Shared cM Project data to give you the most accurate probabilities, including half-aunt/uncle and half-first-cousin options. Try our calculator yourself.