1. SubscriberBigDoggProblem
    The Advanced Mind
    bigdogghouse.com/RHP
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    26 Nov '04
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    117330
    07 May '06 00:17

    Position after Black's 20th move. How did the game go?
  2. SubscriberSuzianne
    Misfit Queen
    Isle of Misfit Toys
    Joined
    08 Aug '03
    Moves
    35695
    07 May '06 13:53
    Originally posted by BigDoggProblem
    [fen]8/4b2k/ppppppp1/8/3r3n/1PPq4/2rP3P/1N2K1Nb w - - 0 21[/fen]
    Position after Black's 20th move. How did the game go?
    Just a guess, but:

    1. cxd4 Rc1+
    2. Kf2 Rf1#

    I suppose it can't be *that* easy... 🙂
  3. Joined
    12 Mar '03
    Moves
    37225
    07 May '06 14:57
    I'm afraid it is not about the 21st and 22nd moves of the game, but about moves 1 up to 20 😕

    Black's options to reach this position in 20 moves are limited, because the LEAST number of moves is 20:
    - 7 pawn moves (at least 6 of them are captures)
    - 3 bishop moves (Bf8-e7 and Bc8-b7 and Bb7-(xR)a1
    - 3 knight moves Ng8 - h6 (more likely than via e7) - f5 - h4
    - the knight on b8 has not moved and was captured on b8
    - 2 king moves including 0-0
    With the d-file temporarily open:
    - 1 queen move
    - 2 rook moves (after the castling) Rf8 - d8 (more lilely than via f4) - d4
    - 2 more rook moves Ra8 - (x) a2 - c2
  4. Joined
    12 Mar '03
    Moves
    37225
    07 May '06 20:53
    Building on the above, the following seems to do the job:

    1.c3 Nh6 2.Qa4 Nf5 3.Qxa7 Nh4 4.Qxb8 Rxa2 5.b3 Rc2 6.Ra6 bxa6 7.Qb6 Bb7 8.g4 Bxh1 9.Bg2 cxb6 10.Bc6 dxc6 11.Ba3 Qd3 12.Bd6 exd6 13.e4 Be7 14.e5 0–0 15.e6 fxe6 16.g5 Rf4 17.g6 Rd4 18.f4 hxg6 19.f5 Kh7 20.f6 gxf6
  5. SubscriberSuzianne
    Misfit Queen
    Isle of Misfit Toys
    Joined
    08 Aug '03
    Moves
    35695
    08 May '06 05:02
    Originally posted by Mephisto2
    Building on the above, the following seems to do the job:

    1.c3 Nh6 2.Qa4 Nf5 3.Qxa7 Nh4 4.Qxb8 Rxa2 5.b3 Rc2 6.Ra6 bxa6 7.Qb6 Bb7 8.g4 Bxh1 9.Bg2 cxb6 10.Bc6 dxc6 11.Ba3 Qd3 12.Bd6 exd6 13.e4 Be7 14.e5 0–0 15.e6 fxe6 16.g5 Rf4 17.g6 Rd4 18.f4 hxg6 19.f5 Kh7 20.f6 gxf6
    Oh, I see...haha... yes, even though I've seen many puzzles of this sort here, it didn't even cross my mind that's what it was, sorry...
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