13 Feb '05 14:33>1 edit
A (white or black) chess piece (or pawn) dropped on the floor accidentally. It was on h4. Can you tell me what it is?
Originally posted by QuirineWell apart from the fact that it can't be a black queen or rook I have no clue where to start on this.
[fen]2nR3K/pk1Rp1p1/p2p4/P1p5/1Pp5/2PP2P1/4P2P/n7b--[/fen]
A (white or black) chess piece (or pawn) dropped on the floor accidentally. It was on h4. Can you tell me what it is?
Originally posted by XanthosNZWhite has made the last move: pawn c7xNd8R+. There had to be a white pawn on c7 otherwise black's last move left him in check.
Well apart from the fact that it can't be a black queen or rook I have no clue where to start on this.
Originally posted by QuirineFrom Chess Mysteries of Sherlock Holmes. The book is a great introduction to retro problems.
[fen]2nR3K/pk1Rp1p1/p2p4/P1p5/1Pp5/2PP2P1/4P2P/n7b--[/fen]
A (white or black) chess piece (or pawn) dropped on the floor accidentally. It was on h4. Can you tell me what it is?
Originally posted by Mephisto2I'm just not cut out for these problems it seems.
White has made the last move: pawn c7xNd8R+. There had to be a white pawn on c7 otherwise black's last move left him in check.
It could not have been a queen or rook on d8, because the white king would have been in check since there is no way that black's last move was to play away a piece from the back rank standing between the queen and white king (it ...[text shortened]... he remaining piece is the white black squared bishop on h4 (thank god that is a black square).
Originally posted by BigDoggProblemindeed. You only failed to mention the author: Raymond Smullyan.
From Chess Mysteries of Sherlock Holmes. The book is a great introduction to retro problems.
Originally posted by LordOfTheChessboardread the solution posted above. The rook on d7 must have come via f1 -> f8 (probably the piece that took the black bishop) -> d8 ->d7. The one on d8 is simply the result of white's last move, taking the black knight with a pawn and promoting to rook.
this possition can not de reached from a normal game because how did the rook get to d7 to give check?
Originally posted by Mephisto2I think black could also have promoted his pawn to a second black bishop, but that doesn't change the final answer.
White has made the last move: pawn c7xNd8R+. There had to be a white pawn on c7 otherwise black's last move left him in check.
It could not have been a queen or rook on d8, because the white king would have been in check since there is no way that black's last move was to play away a piece from the back rank standing between the queen and white king (it ...[text shortened]... he remaining piece is the white black squared bishop on h4 (thank god that is a black square).
Originally posted by Mephisto2cool, your right, that would make it possible!😀
read the solution posted above. The rook on d7 must have come via f1 -> f8 (probably the piece that took the black bishop) -> d8 ->d7. The one on d8 is simply the result of white's last move, taking the black knight with a pawn and promoting to rook.