Please turn on javascript in your browser to play chess.
Posers and Puzzles

Posers and Puzzles

  1. Standard member MetBierOp
    Dutch
    10 Sep '07 16:18 / 7 edits


    - Add 5 White Queens
    - No Queen may defend another

    -edits-
    Messing with FEN
  2. 10 Sep '07 16:58 / 2 edits
    I think I'm going wrong somewhere. Firstly, the queen on E has to be on E6:
  3. 10 Sep '07 16:59
    Next, the queen on D has to be on D2:
  4. 10 Sep '07 16:59
    Next, the queen on C has to be on C7:

    Now wherever you put a queen on the A file it covers both F squares and vice-versa.
  5. Standard member wolfgang59
    Infidel
    10 Sep '07 18:19
    Cant fault that logic! The only 8 queen solution I have seen is where all the Queens are the same knight-move apart (ie 2up 1right, 2up 1right, 2up 1right).

    Initial set-up must be wrong.

    ?
  6. Standard member MetBierOp
    Dutch
    11 Sep '07 22:20 / 1 edit
    Originally posted by wolfgang59
    Cant fault that logic! The only 8 queen solution I have seen is where all the Queens are the same knight-move apart (ie 2up 1right, 2up 1right, 2up 1right).

    Initial set-up must be wrong.

    ?
    yes it is wrong Qh4 should be Qh3
    sorry for that

    [b]
  7. 12 Sep '07 02:09
    Here is my analysis of the problem in the next 3 posts (1 fen per post):

    I've place Pawns on squares that are not attacked:

  8. 12 Sep '07 02:09
    If a Queen were at e7, then that eliminates c7, d6 & d8 leaving only c2 and d2 for c and d files, therefore the e Queen must be on e4.

  9. 12 Sep '07 02:10
    Thus a2 and c7 must be Queens, eliminating possible Queens for the d file.



    I conclude that it is not possible
  10. Standard member SwissGambit
    Caninus Interruptus
    12 Sep '07 03:05


    The Qb5 should be on b4.
  11. Standard member Dutch Defense
    Stealer of Souls
    13 Sep '07 02:37 / 2 edits


    don't mind the kings
  12. Standard member SwissGambit
    Caninus Interruptus
    13 Sep '07 03:16
    Originally posted by Dutch Defense
    [fen]k6Q/5Q2/3Q4/1Q6/6Q1/4Q3/2Q5/Q6K w - - 0 1 [/fen]

    don\'t mind the kings
    Qa1 and Qh8 defend each other.
  13. 19 Sep '07 18:19
    Originally posted by MetBierOp
    [fen]8/8/8/1Q6/7Q/8/8/6Q1 w - - 0 1[/fen]

    - Add 5 White Queens
    - No Queen may defend another

    -edits-
    Messing with FEN
    It cannot be done
  14. Standard member c00ushion
    I'll take the Draw
    19 Sep '07 22:27
    Originally posted by Arachnarchist
    It cannot be done
    It cannot be done? I love these puzzles and this Problem CAN be done its not easy though,

    The 8 Queens go on these exact Squares this wont work anywhere else, Try it yourself, not one Queen is threatening another Queen.
    From Line A-H
    Queens:
    1:a5
    2:b3
    3:c1
    4:d7
    5:e2
    6:f8
    7:g6
    8:h4

    Try it out for yourself it works. Its Very Possible
  15. Standard member SwissGambit
    Caninus Interruptus
    19 Sep '07 22:36
    Originally posted by c00ushion
    The 8 Queens go on these exact Squares this wont work anywhere else,
    Not only can your configuration be rotated 3 different ways, but there is an example in this thread of a solution with a Q on a center square. So, it's not quite true that the Queens must go on 'exact squares'.