1. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    29 Oct '02 20:46
    Another problem of The chess mysteries of Sherlock Holmes by
    Raymond Smullyan:

    I'll shorten the story.
    Sherlock Holmes enters a room and sees a chess-set with a shilling
    on h4, representing a missing piece. He is then challenged to deduce
    what the missing piece is. Of course he succedes.

    White: Kh8, Rd7, Rd8, a5, b4, c3, d3, e2, g3, h2
    Black: Kb7, Na1, Nc8, a6, a7, c4, c5, d6, e7, g7
    h4: a shilling, representing the missing piece

    Who can tell me what the missing piece is?
  2. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    29 Oct '02 21:42
  3. DonationAcolyte
    Now With Added BA
    Loughborough
    Joined
    04 Jul '02
    Moves
    3790
    30 Oct '02 09:34
    Do we have to assume that both players played sensibly?
  4. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    30 Oct '02 09:43
    Sensibly I don't know.
    They played according to the rules of chess, so this position can be
    reached playing from the begin-position.
  5. Asheville
    Joined
    20 Sep '02
    Moves
    8123
    31 Oct '02 18:03
    Obviously, it is Black's move, but is there anything else we need to
    know to solve this? I'm stuck, since I don't see any way to prove that
    one piece is any more correct than any other. (Except that it cannot be
    a Black Rook or Queen). Also, how is it that white was able to move
    the rook to d7 with check? It could only have come from c7, where it
    would still be checking the king. I don't see that any piece on h4 could
    fix this issue.

    What am I missing?

    Rein
  6. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    31 Oct '02 19:36
    Did the rook on d7 really come from c7?
    Or did white play another last move?

    To answer your question if you need to know more: no! You've got all
    the information you need to solve this problem!
    I must say it's rather complicated...
  7. Joined
    01 Dec '01
    Moves
    14745
    31 Oct '02 19:49
  8. Joined
    01 Dec '01
    Moves
    14745
    31 Oct '02 19:52
    sorry - entered.
    White's last move could have been cxd8+ promotes to rook.
    but then...
    Gil
  9. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    31 Oct '02 19:57
    What did the pawn capture?
  10. Joined
    01 Dec '01
    Moves
    14745
    31 Oct '02 20:09
    didn't figure it out yet. But the missing piece is NOT a white pawn.
  11. Joined
    01 Dec '01
    Moves
    14745
    01 Nov '02 10:11
    going ahead slowly: i think it was a bishop:
    - 2 knights still on the board
    - with Queen or Rook white would be in check before and after blacks
    last move

    later , i am going to reason further from there....
  12. DonationRhymester
    and RedHotTed
    Red Hot Rebel Clan
    Joined
    06 Apr '01
    Moves
    206613
    01 Nov '02 12:12
    Is this the way the board was set up?

    http://hometown.aol.co.uk/rhymsta/Puzzles.html
  13. DonationAcolyte
    Now With Added BA
    Loughborough
    Joined
    04 Jul '02
    Moves
    3790
    01 Nov '02 14:02
    I think that's what Hotpawn said - thanks Andrew! Colin
  14. Dieren, Holland
    Joined
    14 Sep '02
    Moves
    10337
    01 Nov '02 14:13
    Yes it is.

    Thank you very much, Andrew!

    Otto
  15. Joined
    01 Dec '01
    Moves
    14745
    01 Nov '02 14:16
    are you sure the missing piece is on h4 and not on h3?
    I seem to be stuck somewhere. Sin.
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