Posers and Puzzles

Posers and Puzzles

  1. Joined
    25 Aug '06
    Moves
    0
    02 Nov '07 11:32

    Shortest Proof Game in 4.0 moves (Fischer Random Chess)
  2. Standard membersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52874
    02 Nov '07 13:59
    Originally posted by David113
    [fen]bqnrnkrb/pppppppp/8/8/8/8/PPPPPPPP/BQRKNRNB[/fen]
    Shortest Proof Game in 4.0 moves (Fischer Random Chess)
    How about three moves? Is that ok?
    1 N-f3 a5
    2 N-g5 a4
    3 NXh7 #
  3. Joined
    30 Oct '04
    Moves
    7797
    02 Nov '07 14:27
    Originally posted by sonhouse
    How about three moves? Is that ok?
    1 N-f3 a5
    2 N-g5 a4
    3 NXh7 #
    A proof game is usually a game where you show the moves to obtaining a legal position. But I am unfamiliar with Fischer random chess starting position. Would someone more knowledgeable clarify?
  4. Standard membersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52874
    02 Nov '07 14:341 edit
    Originally posted by ilywrin
    A proof game is usually a game where you show the moves to obtaining a legal position. But I am unfamiliar with Fischer random chess starting position. Would someone more knowledgeable clarify?
    Ok, read a wiki about it so it looks to me like it would have to be Knights out, knights in kind of thing.
    1 N(g)-f3 N-f6
    2 N g1 N-e8
    3 N(e)-f3 N(c)d6
    4 N-E1 N-C8
    As for the Fischer Random thing, there are 960 legal starting positions, this being just one.
  5. Joined
    07 Sep '05
    Moves
    35068
    02 Nov '07 14:462 edits
    I think I've got it.

    The problem asks you to find a valid Fischer Random game ending in this position after 4 moves. Note this isn't a valid Fischer Random starting position - I think white and black have to be set up the same.

    So: start from the following position:



    Then the game goes:

    1. Nd3 Nf6
    2. Rc1 Rg8
    3. Kd1 Kf8
    4. Ne1 Ne8
  6. Standard membersonhouse
    Fast and Curious
    slatington, pa, usa
    Joined
    28 Dec '04
    Moves
    52874
    02 Nov '07 14:521 edit
    Originally posted by mtthw
    I think I've got it.

    The problem asks you to find a valid Fisher Random game ending in this position after 4 moves. Note this isn't a valid Fisher Random starting position - I think white and black have to be set up the same.

    So: start from the following position:

    [fen]bqnrkrnb/pppppppp/8/8/8/8/PPPPPPPP/BQNRKRNB[/fen]

    Then the game goes:

    1. Nd3 Nf6
    2. Rc1 Rg8
    3. Kd1 Kf8
    4. Ne1 Ne8
    So you are turning it into a valid random fischer thing?
  7. Joined
    07 Sep '05
    Moves
    35068
    02 Nov '07 15:00
    Originally posted by sonhouse
    So you are turning it into a valid random fischer thing?
    I'm turning it from a valid Fischer random thing into the given position. I think the difference between this and a usual proof game is that you aren't given the starting position.
  8. Joined
    25 Aug '06
    Moves
    0
    03 Nov '07 16:13
    Originally posted by mtthw
    I think I've got it.

    The problem asks you to find a valid Fischer Random game ending in this position after 4 moves. Note this isn't a valid Fischer Random starting position - I think white and black have to be set up the same.

    So: start from the following position:

    [fen]bqnrkrnb/pppppppp/8/8/8/8/PPPPPPPP/BQNRKRNB[/fen]

    Then the game goes:

    1. Nd3 Nf6
    2. Rc1 Rg8
    3. Kd1 Kf8
    4. Ne1 Ne8
    That is indeed correct 🙂
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