Allow overlapping of edges

Hi, I would like to create a graph like this:

http://i.stack.imgur.com/Tdq2T.png 

You could see that edges are forced to be overlapped. 

But whatever I try, I get this rendering:

http://i.stack.imgur.com/9NuaU.png

Is there anyway to force the edge overlap ? 

 

A/

AttachmentSize
desired.png22.19 KB
produced.png22.58 KB

Dot, by default, tries to

Dot, by default, tries to remove all edge crossings. You need to add additional contraints to make sure edges cross. In your case, try adding the line

{rank=same Egg->Face[style=invis]}

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