*dsb
Illegal Position Contest!

#5904
It's impossible because the white bishops are gone and the white pawns haven't moved
A white bishop being gone doesn't cause any legality problem. Think about the easy 10-move proof game you could make if the black pawn on b4 were on c5 instead.

#5904
It's impossible because the white bishops are gone and the white pawns haven't moved
A white bishop being gone doesn't cause any legality problem. Think about the easy 10-move proof game you could make if the black pawn on b4 were on c5 instead.
Oh

Here is an illegal position with a simple explanation. I'm posting it to let the newcomers December_TwentyNine, DefenderPug2, and MyNameIsNotBuddy see which of them can be first to explain correctly what makes it illegal. Others should wait and let one of them post first.

Here is an illegal position with a simple explanation. I'm posting it to let the newcomers December_TwentyNine, DefenderPug2, and MyNameIsNotBuddy see which of them can be first to explain correctly what makes it illegal. Others should wait and let one of them post first.
This was the closest I could get

There just aren't enough black pieces to capture for the pawns to get in the desired position
I'll give you credit for a correct answer, since you have the right idea, but it's better to specify the number of captures needed and available. And you worked too hard by trying to make a proof game. That's not needed to count the number of pawn captures required. The following would suffice as a correct illegality proof:
The white pawns need five captures to get into place, but Black is only missing four men.
Regarding the other suggestions, there's no problem getting the king side pawn structure given one more capture, and the black king can easily get into place. To verify this, remove the black pawn on a6 and see if you can make a proof game to show the position is legal.

There just aren't enough black pieces to capture for the pawns to get in the desired position
I'll give you credit for a correct answer, since you have the right idea, but it's better to specify the number of captures needed and available. And you worked too hard by trying to make a proof game. That's not needed to count the number of pawn captures required. The following would suffice as a correct illegality proof:
The white pawns need five captures to get into place, but Black is only missing four men.
Regarding the other suggestions, there's no problem getting the king side pawn structure given one more capture, and the black king can easily get into place. To verify this, remove the black pawn on a6 and see if you can make a proof game to show the position is legal.
Okay
they can get captured by blacks knights
actually blacks b4 pawn captured whites lsb which is impossible