It looks illegal to me. After White retracts Ph7-h8=N#, a retraction by the black rook gives an illegal check, and the black king can only retract into an illegal double check.
That is correct!
poor white king
Try to make positions that require analysis to prove illegal, one with adjacent kings doesn’t count.
A little too obvious. White has made 10 pawn captures, but all the black units are still on the board.
Illegal with black to move.
this one's gotta be it
Illegal with black to move.
i still can see the bishops are trapped
this one's gotta be it
Still a bit too obvious, how did the pawn on f6 get there?
If it’s white to move it looks legal, last move for black was a capture on h4. Black to move is illegal because he has 6 knights and 4 surviving pawns meaning that white did not have a legal last move since the king would be in an impossible check by the bishop on h4 since nc8 kxc8 is impossible.
this one's gotta be it
Still a bit too obvious, how did the pawn on f6 get there?
through quantum traveling
also the main point (what makes it illegal) is that the rook on e1 drank the invisibility potion (yes, quantum traveling is in chess)
Because the bishop couldn't get out from c1.
Because the bishop couldn't get out from c1.
What about a promotion?
Because the bishop couldn't get out from c1.
What about a promotion?
The bishop on a8 needs to be a promotion for the check to be possible. No other pawns available for promotion (like mine).
Because the bishop couldn't get out from c1.
What about a promotion?
The bishop on a8 needs to be a promotion for the check to be possible. No other pawns available for promotion (like mine).
Would it be legal if the c2 pawn were on c3?
Because the bishop couldn't get out from c1.
What about a promotion?
The bishop on a8 needs to be a promotion for the check to be possible. No other pawns available for promotion (like mine).
Would it be legal if the c2 pawn were on c3?
Endgame Enthusiast is correct! Yes it would be, the last move was g2-g3+ and with the pawn on c3 the king can get to h1 legally.
I didn't even think of that aspect, the g pawn couldn't be the last move because with the configuration of the pawns the king could never get to the 1st rank..nice one, combines alot of themes.
I didn't even think of that aspect, the g pawn couldn't be the last move because with the configuration of the pawns the king could never get to the 1st rank..nice one, combines alot of themes.
Thank you!
I wish they'd make them coördinates bigger. I just spent five minutes working on a proof game.
But it's illegal either way up - pretty.
Yeah I usually put white on the bottom, I only occasionally flip the board. Do you see why it’s illegal either way up?