Illegal Position Contest!

probably not fool proof but 99% there

how?

whites king bishop pawn is blocking the way

also if its captured, white cant promote to a knight to get captured on a6 (h3 must live on)

On the other hand, EvinSung sometimes posts legal positions here.

Analyzing a player's pieces is a way to prove a position illegal. A proof game is the way to prove a position legal.

yeah, maybe there is a deadlock and your player analysis is wrong (when claiming legal)(sometimes)

p.s. it took an im to get the proof game, but i dont think castling is needed to be possible unless states

This is the proof game I was working on while thelegend759 was making one. It's a little shorter, but thelegend759 finished first.

think tygxc would shorten this

Probably. tygxc usually shortens any proof game I come up with. But this isn't the shortest proof game thread, so all we really needed was the first game from thelegend759.

1st rank pawns

4 kings

13 pawns needed per side

Was going to say this was possible, but it's not possible because the white pawns make it so his dark square bishop should still be trapped, and the black pawns make it so that if a pawn promoted to a dark square bishop, it would be trapped. 

The pawns wouldn’t be able to stack up like that there’s 8 pawns total at the start of the game. You have 6 left. Also wouldn’t pawn on b2 have to be captured by pawn on b6 for it to be there.

b6 could have captured anyhting else

Ahhhhh. Ok

If the bishop on e5 came from c1, it has jumped over a white pawn. If it's a promoted piece, it has jumped over a black pawn. Bishops can't legally do that.

This is just another way to word the illegality proof MyNameIsNotBuddy has already given.

This one might be a little too easy, but it's an improvement over your previous one, which was legal.

1. Nf6
2. e5
3. Ng7

It's impossible because the white bishops are gone and the white pawns haven't moved