10000000000000000000000% illegal.
I can see you tried hard to create an illegal position that would make us think it might be legal without a careful analysis. This one was not too successful, but keep trying.
Very funny
what??
the board is reversed huh
ok
also im getting notifs again!
How do you know the board is reversed? There is 0 proof of that.
Some harder challenge?
What is this?
If White's side of the board is at the top, it's an illegal position.
If White's side of the board is at the bottom, it's either an illegal position in classical chess, or a legal position is some variant forms of chess such as Chess960.
Lazy person's way to make a position illegal: Specify White to move when Black is in check.
And then it will evolve into this...
atomic chess
Some harder challenge?
No successful attempts yet on my #4730 position.
Some harder challenge?
No successful attempts yet on my #4730 position.
Which, to remind everyone, is this:
Illegal because there already is a Black dark-squared bishop, so Black would have to promote, but Black has 8 pawns, so that is impossible. And also White hasn't moved yet.
What is this?
If White's side of the board is at the top, it's an illegal position.
If White's side of the board is at the bottom, it's either an illegal position in classical chess, or a legal position is some variant forms of chess such as Chess960.
No for White on top, because you could be Black in the position. Also no for White on bottom, because you are White in the position! 
No for White on top, because you could be Black in the position. Also no for White on bottom, because you are White in the position!
That's not clear. I can't tell if you're agreeing or disagreeing with me that the position is illegal in classical chess. If you're claiming it's legal, you need to provide a proof game.
(By the way, the FIDE Laws of Chess specify that White's pieces are light colored and Black's pieces are dark colored. Any position which requires Black to be playing white pieces is illegal, not just silly.)
Illegal because there already is a Black dark-squared bishop, so Black would have to promote, but Black has 8 pawns, so that is impossible. And also White hasn't moved yet.
A good analysis of this difficult position. But you neglected to mention that it's also illegal because Black has 17 men on the board.
what??
the board is reversed huh
ok
also im getting notifs again!
How do you know the board is reversed? There is 0 proof of that.
i guessed it was that trick
Illegal because there already is a Black dark-squared bishop, so Black would have to promote, but Black has 8 pawns, so that is impossible. And also White hasn't moved yet.
A good analysis of this difficult position. But you neglected to mention that it's also illegal because Black has 17 men on the board.
if a position where black has 17 men is not "difficult"
#4730 retry: The b pawn couldn't get over the the right! The e pawn could become the uppermost pawns on the f or h file, which are on f3 and h5, but the e pawn being one means it can't be the other. That means the b pawn, which is missing from the b file, has to be either the f3 pawn or the h5 pawn. However, it can't. It can't get to the f or h file because if it keeps on capturing to the right, it'll be on f6 or h8 (and actually promote in the latter scenario), not f3 or h5.
Black's Pawns are advancing towards the first rank, not the eighth.
#4730 retry: The b pawn couldn't get over the the right!
Huh? It only takes one capture for the black b-pawn to get from b7 to c2.
No for White on top, because you could be Black in the position. Also no for White on bottom, because you are White in the position!
That's not clear. I can't tell if you're agreeing or disagreeing with me that the position is illegal in classical chess. If you're claiming it's legal, you need to provide a proof game.
(By the way, the FIDE Laws of Chess specify that White's pieces are light colored and Black's pieces are dark colored. Any position which requires Black to be playing white pieces is illegal, not just silly.)
Well White is the lighter pieces, and Black has the darker ones! It isn't hard to see. (Oh, and here could be the position for if you're White.)
No for White on top, because you could be Black in the position. Also no for White on bottom, because you are White in the position!
That's not clear. I can't tell if you're agreeing or disagreeing with me that the position is illegal in classical chess. If you're claiming it's legal, you need to provide a proof game.
(By the way, the FIDE Laws of Chess specify that White's pieces are light colored and Black's pieces are dark colored. Any position which requires Black to be playing white pieces is illegal, not just silly.)
Well White is the lighter pieces, and Black has the darker ones! It isn't hard to see. (Oh, and here could be the position for if you're White.)
I'm still waiting for your proof game to show how the king and queen traded places in your position at #4742.
what??
the board is reversed huh
ok
also im getting notifs again!