Shortest-proof-game challenge

@6175

@6177

First try:

Here's one that might be a little harder.

41.5

Hello

Proof game in 32.5.

Proof game in 23.0.

I can do #6179 with the e5 pawn moved to f4, but otherwise I am always 1 piece short. If nobody else is attempting the position, I'd like to ask for a hint: did white's d-pawn make any captures?

It sounds like you're getting close. I'll give you the hint. White's d-pawn made one capture.

You may be the only one attempting the position.

Is it necessary for the d-pawn to make a capture, or are there methods that do not involve a capture by the d-pawn?

Capture is necessary for SPG.

This position is legal too!

First try, 36.5 moves. BishopTakesH7 will tell us how much shorter it needs to be.

That position shouldn't end in black to move because the puzzle starts with white to move. Black has mate in a 1 in that position.