Shortest-proof-game challenge

Here's a game, might be shorter.

When are we going to be able to have crazy house rules ? Or player made chaos?

You can choose the rules for positions you post here. There's no guarantee others here will be interested in them.

I do it in 12.0.

Man, you guys are killing it with these specific challenges!

Looks like the formatting preferences still aren't being saved contrary to Martin's claims. Here's the last position I posted:

I call it the "rook rage" checkmate. Normal Shortest game challenge for this one!

@5855

First try:

Slightly shorter.

After you improve on Kyobir's 22-move game, see if you can improve on the 53.5 move game for this old position.

Looks to me like the key to getting this shorter would be to make sure Black keeps capturing and ends with a capture on b4/d4.

Here's one way to get it shorter.

In reverse, this is optimal: https://puzzling.stackexchange.com/questions/45647/chess-the-lone-king

@5858

Slightly shorter

@5858

Slightly shorter

Fastest game where White to move is checkmate and Black to move is checkmate:

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Asymmetrical:

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More:

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Second challenge: find the fastest position where white/black to move is mate, but the queens never move and the queens are not the mating pieces.