Quickest Way to Pawn-Filled File

lol,

Here is some more information. It must be a legal game. All moves must be legal, and if a king were ever in check it must get out of check. Kings may not be captured. :-)

On the existence of a potential solution, I'll just say for now that if it were a homework assignment and I wrote all that I know on the topic, I would very likely get an A. I don't want to give too much away, since a bit of the fun here is to try to out-do a previous solution. That, in conjunction with various lower bound style statements on minimum move amounts will give you an idea of "how close" you are theoretically. I consider the problem solved if you can prove a lower bound using a set of statements and then give an example solution using exactly that number of ply.

The problem intrigues me but not as much as my productivity intrigues my boss right now.

I may take a run at it later if no one else has solved it in the mean time.

That's pretty funny.

It's interesting to work on, regardless of whether anyone has posted a solution.

if u are trying to get all 6 on e file.the  fastest would be just moving and capturing all at once so 2nd pawn is 1 move 3pawn is 2 moves etc.  cause like the b pawn is 7 rank pawn c 6th d 5th etc

the problem is gettin blacks pieces to be capturable.

so 1+2+3+4+5 =15moves-,- without using all pieces

One ply faster, for what it's worth.

Found another way to squeeze a half-move in there. Don't see how it could possibly be any faster than this.

Incredible!

Nice job! I can't think of any theoretical reasons why it could not be one tempo faster, but I certainly don't know any way to do it. And it seems like 11 1/2 moves is the absolute theoretical minimum.

Very impressive! So the key really was to use the rooks after all.

11 1/2 moves == "white's 12th move"

Uh, sorry, I mean the mixed number "11 1/2" full moves, not the integer "11" half-moves. If that make sense.

That is, 23 tempoes, if we are calling a tempo a "half-move" and two tempoes a "full-move."

Yes, the theoretical minimum that I can come up with is 23 tempos, a.k.a. white's 12th move.

I know of one solution ending on white's 12th move. Voila!

c file, nice!