Gummelt s Decagons hi I was trying to make some images for the Gummelt s decagon section and I ve run into what appears to be an error in the article It states that the only two allowed overlaps are those shown in this image However the following sources seem to say that so long as the red areas only overlap other red areas anything goes Source 1 p 2 Source 2 p 2 Now as I was drawing this image I found that I could not get the current only two rule to hold as I built the tiling but if I used the so long as they match rule it would work Is the article wrong or have I got it mixed up Cheers