possible or impossible?

You're right JamieKowalski you gave te right answer!

Sorry Scottrf but you were a little bit too late...

Possible.

Aww to late. Bad connection.

You didn't recreate the position

okay 16...ng4 17.Bxg8 Nh6 18. Bc4

you forgot 18... a6 19. Bd3 a5 20. Bc4

This one is possible. Black and white could've just been moving their knights back and forth.

is this one (that looks like the previous one) possible WITHOUT USING KNIGHTS

Ok, I have one for you all. Is this possible?

Yes, the white light squared bishop was captured by the rook, but the king needs to walk all the way out first, and so does white's rook.

JamieKowalski:

Wow, that was fast, andrew!

thanks!

What about this one?

Oh god, this reminded me of one of the most epic threads on chess.com.

http://www.chess.com/forum/view/general/legal-and-illegal-positions

Here's a nice head-scratcher: