Bump for shoopi.
Since I first made this thread, I have been working on this task off and on. I wasn't able to make a problem that met the requirements. Tonight, I discovered that the task is acheiveable; I found a composition by another composer that meets the challenge. Thus, I am giving people another chance to try this.
Cool, I'll give this a shot.
Well, now I'm curious about that composition that you mention.
Anyway, this is really quite hard. However, I had a certain strategy in mind which seems to work after playing with it for a while:
Alright at first I thought only black was not allowd to have any knights, so this strategy does not work. I will work on a new one that meets the requirements later 
I like these challenges, they're fun.
Here you go:
Took me about one and a half minutes to produce such a game, not difficult.
@shoopi, pretty pointless showing us the end position if you dont publish the moves that got you there.
Took me about one and a half minutes to produce such a game, not difficult.
But I didn't ask for a game. I asked for a position in which black must have (past tense, meaning before the position that you construct) promoted a pawn to N.
@shoopi, pretty pointless showing us the end position if you dont publish the moves that got you there.
No no, shoopi has given what I asked for. I didn't ask for him to solve his own composition for us. That's our job.
Here you go:
Yes, I think that works. I see that you used the castling motif from another recent retro thread. :)
In the composition I found, the side to move was not stipulated. For bonus points, can you achieve this task without stipulating the side to move?
(When I was trying to do this task, I was not stipulating the side to move. I'd like to think I could do it if I'm allowed to stipulate the side to move. But now I have to prove it!)
Here you go:
I see that you used the castling motif from another recent retro thread. :)
Eww, you caught me 
I'll see if I can do it.
So, what are we meant to be doing here, taking shoopi's diagram and then working out what moves were played from the beginning of the game to reach the end position?
So, what are we meant to be doing here, taking shoopi's diagram and then working out what moves were played from the beginning of the game to reach the end position?
Yes, that's one thing we're doing.
sorry, but it seems a pretty pointless exercise, there are probably tens of thousands of ways to reach the diagram position!
sorry, but it seems a pretty pointless exercise, there are probably tens of thousands of ways to reach the diagram position!
The point is, in all of them, black promotes a pawn to a Knight.
Just letting you know that I can do it but I'm working on a position where there are no knights and both sides must have promoted to a knight. I don't know if I have the best strategy since it is extremely difficult... but I may have a solution soon.
Challenge: create a position where black must have promoted a pawn to N, but there are no knights on the board. Also, neither King is in check.