OK, with that I think the 2-avatar closing files mate works. Without loss of generality (now that everything is symmetric), say defending avatarius (I'm just going to call it "king" for the rest of this) is somewhere on files a-d. We should have plenty of time to set up two avatars on, say, h4 and g5, then can walk them to f6 and g5. The defending king is somewhere a-e.
Next we want to pivot from g5 to e8; we can go through h5, and we just need to be sure to defend e8. The f6 avatar covers most of the ground, leaving only d7, and zugzwang makes it easy.
Next to pivot from f6 to d1. The steps f5,h5 will do for travel, and again we just need to ensure safety of the landing square. This time it looks like we need to use the friendly king, using zugzwang to ensure d2 is not occupied so that our king can move to e1.
The hardest pivot might be from e8 to c3. I think the friendly king needs to get into the a-c files now in order to protect c3 while not blocking the d-file queen guard. I think this is possible through e1-d2-c2, keeping the e8 avatar to prevent escape while our king is on d2, using a bit of zugzwang to force our king's way in?
After that it's easier, with c3 protecting b4 for the next pivot (through e.g. d5, or f3/g4-f4), and then a final c3-a1 or c3-h8-a8 (depending on which half of the a file the enemy king is confined to).
OK, with that I think the 2-avatar closing files mate works. Without loss of generality (now that everything is symmetric), say defending avatarius (I'm just going to call it "king" for the rest of this) is somewhere on files a-d. We should have plenty of time to set up two avatars on, say, h4 and g5, then can walk them to f6 and g5. The defending king is somewhere a-e.
Next we want to pivot from g5 to e8; we can go through h5, and we just need to be sure to defend e8. The f6 avatar covers most of the ground, leaving only d7, and zugzwang makes it easy.
Next to pivot from f6 to d1. The steps f5,h5 will do for travel, and again we just need to ensure safety of the landing square. This time it looks like we need to use the friendly king, using zugzwang to ensure d2 is not occupied so that our king can move to e1.
The hardest pivot might be from e8 to c3. I think the friendly king needs to get into the a-c files now in order to protect c3 while not blocking the d-file queen guard. I think this is possible through e1-d2-c2, keeping the e8 avatar to prevent escape while our king is on d2, using a bit of zugzwang to force our king's way in?
After that it's easier, with c3 protecting b4 for the next pivot (through e.g. d5, or f3/g4-f4), and then a final c3-a1 or c3-h8-a8 (depending on which half of the a file the enemy king is confined to).