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Posers and Puzzles

Posers and Puzzles

  1. 17 Sep '07 15:58 / 1 edit
    I want to construct a proof game for the following position:

    White moved last.
    Please help
  2. 17 Sep '07 19:38
    Originally posted by David113
    I want to construct a proof game for the following position:
    [fen]1B6/n1NPpP1p/pPPkrp2/PRppp3/b7/Kp6/Rr1P3P/n1b5[/fen]
    White moved last.
    Please help
    What about b7-b8=B
    or Na8-c7 alt. Na8xc7
    or Rb4-b5 alt. Rb4xb5

    Is the problem that there is only one possible move...?
  3. 17 Sep '07 20:03 / 1 edit
    There are a few possible last moves. What I need is not the last moves but a complete game score (which of course is not unique). It is probably not very difficult but somehow I always make a mistake and get stuck.
    The general structure of the game, without giving many specific moves, will also help.
    general structure = which piece captured which, in what order, in what order did the pieces come to their final squares, etc.
  4. Standard member SwissGambit
    Caninus Interruptus
    17 Sep '07 20:03 / 1 edit
    Originally posted by David113
    I want to construct a proof game for the following position:
    [fen]1B6/n1NPpP1p/pPPkrp2/PRppp3/b7/Kp6/Rr1P3P/n1b5[/fen]
    White moved last.
    Please help
    White captured bQ on the d-file. Black made 4 captures to get the pawn structure [b- and c-pawns cross-capture to get behind wP's, and g- and f- shifted one left each]. This accounts for all captures.

    wPg2 is not on the board, and could not have been captured; it must have promoted.

    Retraction could run: 1.Rb4 Bb5 2.Ka4 Be2 3.Rg4 Nb5 4.Ra3 Nd4 5.b5 cb6[+R] 7.Rc3 Kc5 8.Rcg3 etc. The 3rd Rook is the promoted g-pawn.

    Edit: This is a good enough hint to allow construction of a PG. Giving the whole thing would be a bit tedious.
  5. 17 Sep '07 20:10
    Originally posted by SwissGambit
    White captured bQ on the d-file. Black made 4 captures to get the pawn structure [b- and c-pawns cross-capture to get behind wP's, and g- and f- shifted one left each]. This accounts for all captures.

    wPg2 is not on the board, and could not have been captured; it must have promoted.

    Retraction could run: 1.Rb4 Bb5 2.Ka4 Be2 3.Rg4 Nb5 4.Ra3 Nd4 5.b5 ...[text shortened]... od enough hint to allow construction of a PG. Giving the whole thing would be a bit tedious.
    Thanx