Shortest-proof-game challenge

The only position I ever posted should have been the version without a rook on h1, since I never created a version with the rook on h1.

Interestingly, I did create several versions with a rook on g1, which were all cooked by Jacobi. But they also had different configurations for black, and I never posted those either.

SPG in 14.0, not unique. Position has no unique proof games.

@6036

I hate those positions that must end with white to move as black couldn't have made the last move.

SPG in 16.5, not unique.

Those are my favorite kind.

This might be a fun position for y'all to try out.

Easier challenge

@6042

It's legal. Rewan will tell us how much shorter it needs to be.

How short a game can you make to display this Christmas tree?

It's pretty. Do you have a proof game for it? I'm sure it will take more moves than #6045.

EvinSung posted this position in the Illegal Position thread, but there it was illegal because there was a black knight at d5. How short a proof game can you find for this legal position?

Here's a game in 34.5; Rewan will tell us how much shorter it needs to be.

White seems to have additional moves, so a more optimal black pathing will allow for a shorter game.

Not yet, but I think I'll work on your tree first.

Are you sure it's legal? So far I couldn't get that many bishops on those squares. White's last move also was an extra capture. But I'll look gain later!