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Posers and Puzzles

Posers and Puzzles

  1. 13 Nov '06 23:53
    Find a position with 4 pieces, where it is possible to conclude what were the last 3 plies. In your solution a king may be in check; if no king is in check you are allowed to specify who moved last.
  2. Subscriber BigDoggProblem
    The Advanced Mind
    14 Nov '06 00:34
    Originally posted by David113
    Find a position with 4 pieces, where it is possible to conclude what were the last 3 plies. In your solution a king may be in check; if no king is in check you are allowed to specify who moved last.
  3. 14 Nov '06 00:54
    fxe6 en passant, preceded by e5, preceded by a1B right?
  4. Subscriber BigDoggProblem
    The Advanced Mind
    14 Nov '06 00:55
    Originally posted by Ian68
    fxe6 en passant, preceded by e5, preceded by a1B right?
    White's pawns are moving up the board, so a1B is impossible.
  5. 14 Nov '06 01:04
    Originally posted by BigDoggProblem
    White's pawns are moving up the board, so a1B is impossible.
    Oh yes, so how did the bishop get there?
  6. Subscriber BigDoggProblem
    The Advanced Mind
    14 Nov '06 02:38
    Originally posted by Ian68
    Oh yes, so how did the bishop get there?
    A bishop stuck in the corner like that can only give check via discovery, of course.
  7. 14 Nov '06 04:21
    Originally posted by BigDoggProblem
    A bishop stuck in the corner like that can only give check via discovery, of course.
    fxe6 en passant removes a pawn from e5 which is a discovered check, but the pawn was moved e7-e5 the previous move to block check from the bishop. The bishop can only have moved on the a1-h8 diagonal so with the black pawn still on e7 black's king would have been in check before and after white's previous move.

    Don't you need to move everything across 1 square: bishop on b1, pawn on f6 and king on g6?
  8. Subscriber BigDoggProblem
    The Advanced Mind
    14 Nov '06 05:02
    Originally posted by Ian68
    fxe6 en passant removes a pawn from e5 which is a discovered check, but the pawn was moved e7-e5 the previous move to block check from the bishop. The bishop can only have moved on the a1-h8 diagonal so with the black pawn still on e7 black's king would have been in check before and after white's previous move.

    Don't you need to move everything across 1 square: bishop on b1, pawn on f6 and king on g6?
    Is -1.fxe6 the only possible en passant capture?

    Moving the pieces one square to the right gives several possible last moves. Ba2 could have captured almost any piece on b1, giving check.
  9. Subscriber BigDoggProblem
    The Advanced Mind
    17 Nov '06 21:32
    The last moves in my solution were -1.dxe6ep e7-e5 -2.d4-d5+. I'm surprised no one got this.
  10. 17 Nov '06 22:26
    Originally posted by BigDoggProblem
    The last moves in my solution were -1.dxe6ep e7-e5 -2.d4-d5+. I'm surprised no one got this.
    well you posted the correct position right away. not much there to add then

    i knew this one from a book. white king is on d7 and author is N. Hoeg, Skakbladet 1916
  11. Subscriber BigDoggProblem
    The Advanced Mind
    18 Nov '06 04:09
    Originally posted by crazyblue
    well you posted the correct position right away. not much there to add then

    i knew this one from a book. white king is on d7 and author is N. Hoeg, Skakbladet 1916
    Ahh, many thanks for finding the original. I knew this idea seemed familiar.