possible or impossible?

I can't figure out how white can get rid of the rest of his tempo, unless he moves the rook or king.

Impossible. White's last move had to be e5-e6, which would have begun with Black in check.

lol jk

Nice proof game s0030135. You understood that white's light square bishop must have been captured on it's original square, and I like the way you lose tempo at the end with the black king.

Here's another one by cobra91.

Can both kings castle?

Yes.

Winning the internet.

Yes, it's 2 weeks ago that Shoopi posted something and I was getting bored lately so I wanted to do something too, so I made this puzzle: I think it's not as hard as it looks. If black does it's best to not move his Queenside Rook and King, can black still castle?

White's last move was not the King

Impossible to know.

I do think it is possible to know it...

The answer must be no then.

it doesn't have to be no

Yes it does. There's no way of telling if the rook or king have left and returned to their initial positions.

changed it

but you were right before I changed it

Seeing that the White's last move was Knight on g8, and since it couldn't get here from normal moves means this is a promoted Knight h7xg8=K. This means Black "could potentialy" castle unless this is proved through a entire reconstitution of the position with that set-up.

impossibru

with the number of pieces that black has, is it possible to get a pawn to that position? and can anyone try to get the position with moving the pieces in a legal way that you'll get to the position?

Nice work...

You're right s0030135! Nicely done making the game. Also Fralnp's explanation of the Knight being promoted is right! But g7-g8=N was simplier than the move h7xg8=N.