1. Joined
    29 Apr '05
    Moves
    827
    13 Aug '07 13:48
    white to move. mate in 5. 🙂

  2. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    13 Aug '07 17:351 edit
    Originally posted by crazyblue
    white to move. mate in 5. 🙂

    [fen]6bk/PPPP1R1p/3rp2N/4p3/4P3/4K3/3rP3/8 w - - 0 1[/fen]
    1.d8B! Rxd8
    1.R~d3+ 2.ed Rxd3+ 3.Kxd3 Bxf7 4.Bf6#
    2.cxd8B! Rxd8 3.b8B! Rxb8 4.axb8B! Bxf7 5.Bxe5#

    Try: 1.d8Q? R~d3+ 2.exd3 Rxd3+ and White can't recapture due to stalemate.

    Hilarious problem with 4 Bishop promotions.
  3. Joined
    29 Apr '05
    Moves
    827
    13 Aug '07 17:48
    well done! here is a new one. white to move and mate in 3.

  4. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    13 Aug '07 19:55
    Originally posted by crazyblue
    well done! here is a new one. white to move and mate in 3.

    [fen]4K1R1/PP2P3/2k5/3pP3/3B4/6P1/8/8 w - - 0 1[/fen]
    1.b8R Kc7 2.a8B Kxb8 3.Kd7#
  5. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
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    92274
    13 Aug '07 19:59

    #5
  6. Joined
    09 Jun '07
    Moves
    1416
    13 Aug '07 20:50
    Originally posted by SwissGambit
    [fen]8/N1p5/P1Pp4/3k1B2/P2Pp3/2K5/5P2/8 b - - 0 1[/fen]
    #5
    1. Bd7! e3
    2. f3 e2
    3. Nc8 e1=B
    4. Kd3 Ba5
    5. Ne7#

    In my head so correct if wrong.
  7. Joined
    29 Apr '05
    Moves
    827
    14 Aug '07 00:32
    Originally posted by DeepRed
    1. Bd7! e3
    2. f3 e2
    3. Nc8 e1=B
    4. Kd3 Ba5
    5. Ne7#

    In my head so correct if wrong.
    That's mate, but not forced. What if Black plays 3... e1=Q? Getting difficult for White then.
  8. Joined
    29 Apr '05
    Moves
    827
    14 Aug '07 20:36
    1. a5 e3 2. Nc8 Kxc6 (otherwise Ne7 mate) 3. Na7+ Kd5 4. fxe3 c6/c5 5. e4 mate


    Havent seen this one in here before:

    White to move. Mate in 3.


  9. Joined
    29 Apr '05
    Moves
    827
    17 Aug '07 12:39
    Is it too difficult? Here's a hint: White will move queen twice and a rook once (not necessarily in that order) 😉
  10. e1
    Joined
    11 Aug '07
    Moves
    1109
    18 Aug '07 16:58
    Originally posted by crazyblue
    Is it too difficult? Here's a hint: White will move queen twice and a rook once (not necessarily in that order) 😉
    I see 4 moves, 1 queen & 3 rook moves. Hmmm, will have to think a bit more on this ...
  11. Joined
    12 Mar '03
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    37185
    18 Aug '07 17:51
    Originally posted by crazyblue
    Is it too difficult? Here's a hint: White will move queen twice and a rook once (not necessarily in that order) 😉
    1.Rh1! and black is in zugzwang. White threatens mate on d6 or c6 with the queen if black plays a knight move. But after a bishop move (Bd7 or Be8) then 2.Qb1 and 3.Qb4# do the job. Except when black plays 2. ... Bb5 (back to the original square) then 3.Qg1# does it. That is why only Rh1 works.
  12. e1
    Joined
    11 Aug '07
    Moves
    1109
    19 Aug '07 06:341 edit
    After not being able to solve it, I tried a couple of programs, but the best they would do was 4 moves. So I got out my old Fidelity Chess Challenger 10 and put it in Mate in 2 mode (1 hour per move). No luck. Then I tried the Postal Chess mode (1 day per move) and it solved it! Image that, a 30 year old computer chess game did the trick! 😀

    Then I came back here and saw that it was solved!! That stupid slow Chess Challenger!!! 😴
  13. Joined
    25 Aug '06
    Moves
    0
    19 Aug '07 09:23
    If you liked the idea in crazyblue's problem, you can see more "Bristols" here:

    http://user.sezampro.yu/~mivel/BRISTOL.HTM
  14. Joined
    05 Jun '07
    Moves
    906
    25 Aug '07 22:23


    I got this one from a friend. Reach a theoretically won position or zugzwang.
  15. Standard memberSwissGambit
    Caninus Interruptus
    2014.05.01
    Joined
    11 Apr '07
    Moves
    92274
    25 Aug '07 23:15
    Originally posted by twilight2007
    [fen]4KBkr/6Pp/7P/4P3/8/3P4/5p2/8 w f2 0 1[/fen]

    I got this one from a friend. Reach a theoretically won position or zugzwang.
    1.Be7 f1Q 2.Bf6 threat gh8 2...Qxf6 3.gxh8Q+! [not 3.exf6 stalemate] 3...Qxh8 4.d4! zz 4...Qg7 5.hxg7 h5 6.e6! The K has to move in any case, so this pawn is the right one to push 6...h4 7.e7 h3 8.Kd7 h2 9.e8Q+ and Black has come out one tempo too slow.
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