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Posers and Puzzles

Posers and Puzzles

  1. 09 Jan '07 07:34
    Found a method by which two rooks and a knight could mate a lone king in the middle of the board. anybody else?
  2. Subscriber BigDoggProblem
    The Advanced Mind
    09 Jan '07 08:41
    Originally posted by Tripcyc
    Found a method by which two rooks and a knight could mate a lone king in the middle of the board. anybody else?
    If you're thinking of Sam Loyd's problem, the position he found is illegal, and thus not really checkmate.



    This is called an 'imaginary check' in retro analysis - it is impossible to achieve in a legal game.
  3. 09 Jan '07 09:01
    Yes I am thinking of Loyd, only the story I've seen via Martin Gardner is: Loyd announces in one of his columns that a discovery has been made, and later publishes the solution as [ fen 4, NRkR, 4], a somewhat smaller board but very much exactly in the middle!-- to first the fury and then amusement of his readership.(otherwise he would've had to state in 'the middle of a section of the board' as I reckon his imagination.
  4. 09 Jan '07 09:04 / 3 edits
    Edit: Sorry, I made a mistake...
  5. 10 Jan '07 18:13 / 2 edits


    It's possible if you include the white king. Is that allowed?
  6. Subscriber BigDoggProblem
    The Advanced Mind
    10 Jan '07 20:15
    Originally posted by kbaumen
    [fen]8/8/8/2NRk3/2K5/8/5R2/8 w[/fen]

    It's possible if you include the white king. Is that allowed?
    That makes it a bit too easy...you don't need the Knight for that.

  7. 12 Jan '07 10:17
    Well, I've only seen it in a diagram with a 12-square board, one of Loyd's little jokes: fen[4, NRkR, 4]