Shortest-proof-game challenge

#640
Here is a proof not yet shortened

I have a feeling you could shorten this one considerably if you wanted to take the time. I would rather see you finish up your work at #585 and move on to #570.

wdym? you shortened it by 9 moves compared to white to move

Currently:

White to move - 49 moves (Hillosanation)

Black to move - 67.5 moves (tygxc)

well tygxc had a 78 white to move or something

Black to move is more complicated. How to do it was figured out by tygxc. I had tried to do it and gave up.

hi

i also want to play this game can i suggest a position

yes

anyone can

also which positions are still "active" i.e. still getting attempted

im asking the question to @n9531|1

@n9531l1

an attempt-

improvement-

another-

i dont get how i can improve this

found a 70 move solution

i guess

it is the best

so it is optimal?

yay!

try this one