44 minutes ago, Riamus said:However, if your distance is enough to get beyond the loaded chunks, they will just dig no matter what.
That is what I am thinking. The back wall is 70-ish meters from the entrance and about 50meters below ground. Probably 34-40 rock in between the surface and the base layer.
What is the total size/distance across a chunk? Is it the size of the prefab block/sections in cities? I have read it's a 16x16 square from bedrock to sky, but the zombie spawn much further out than that on horde night. I'd say at least 100 blocks away and run.