Posers and Puzzles

Posers and Puzzles

  1. Sigulda, Latvia
    Joined
    30 Aug '06
    Moves
    4048
    23 Nov '06 20:56
    Thanks to ilywrin, who sent this puzzle to me. It was very difficult, I couldn't solve it. Even Fritz 6 showed only a mate in four moves although this is a mate in three. And if someone can't figure it out who's to move, it's white to move and mate.

  2. Joined
    12 Mar '03
    Moves
    37905
    23 Nov '06 21:11
    Wow, now THAT is beautiful.
  3. SubscriberBigDoggProblem
    Court Jester
    lacking discretion
    Joined
    26 Nov '04
    Moves
    124154
    24 Nov '06 07:262 edits
    On this one, I thought it would be fun to explain how I solved it.

    I considered set play (pretend White 'passes' on his first move, and fulfill the stipulation for as many Black defenses as possible).

    1...Kd7 2.Qg4+ Kc6 [2...Kd8 3.Rf8#; 2...Ke8 3.Qc8#] 3.Qc8#

    In other words, I don't need to take any special measures against 1...Kd7; I just ensure my Q has access to the c3-h8 diagonal. This frees me to devote all resources to defeating 1...Kb7.

    If Black is allowed to play 1...Kb7 and 2...Ka7, White has difficulty constructing a mate. I want to play something like 2.Rf7+ to keep him out of a7. After this check, he either returns to c6 for 3.Rc7#, or gets nailed to an edge (2...Kb8 or 2...Ka6). To give mate against both of those, my Q must already be on a square that connects to both the 8th rank and the a-file. There is only one such square.

    1.Qd4!! A great key move. Without the above logic, a very hard first move to find. In fact, all the defenses but one are known already. The only one left to consider is the acceptance of the sacrifice, 1...cxd4 2.Rf7! Now possible because the stalemate is relieved. 2...Kc5 (or 2...d3) 3.Rc7#
  4. Sigulda, Latvia
    Joined
    30 Aug '06
    Moves
    4048
    24 Nov '06 09:31
    Originally posted by BigDoggProblem
    On this one, I thought it would be fun to explain how I solved it.

    I considered [b]set play
    (pretend White 'passes' on his first move, and fulfill the stipulation for as many Black defenses as possible).

    1...Kd7 2.Qg4+ Kc6 [2...Kd8 3.Rf8#; 2...Ke8 3.Qc8#] 3.Qc8#

    In other words, I don't need to take any special measures against 1... ...[text shortened]... [/b] Now possible because the stalemate is relieved. 2...Kc5 (or 2...d3) 3.Rc7#[/b]
    Nice. That indeed is the answer.
  5. Joined
    29 Apr '05
    Moves
    827
    24 Nov '06 10:061 edit
    Oh, I tried to solve it without board only and for me 1. Qh1 also worked. Gotta take a look at that now, why it doesnt work. 🙂
  6. Joined
    12 Mar '03
    Moves
    37905
    24 Nov '06 12:19
    Originally posted by crazyblue
    Oh, I tried to solve it without board only and for me 1. Qh1 also worked. Gotta take a look at that now, why it doesnt work. 🙂
    Qh1 then Kb7. If Rf7+ or Qh7+ then Ka6 holds another move.
  7. Joined
    06 Jul '06
    Moves
    1163
    25 Nov '06 13:26
    Originally posted by BigDoggProblem
    On this one, I thought it would be fun to explain how I solved it.

    I considered [b]set play
    (pretend White 'passes' on his first move, and fulfill the stipulation for as many Black defenses as possible).

    1...Kd7 2.Qg4+ Kc6 [2...Kd8 3.Rf8#; 2...Ke8 3.Qc8#] 3.Qc8#

    In other words, I don't need to take any special measures against 1... ...[text shortened]... [/b] Now possible because the stalemate is relieved. 2...Kc5 (or 2...d3) 3.Rc7#[/b]
    I looked at this and got drove to frustration so much that I turned the computer off and went out on the drink.
    Now I'm looking at a computer screen with a little envy and a lot of hangover, oh and a strange woman with humongous knockers making tea...... alls not lost then eh?.....

    so i say well done to Bigdogg for solving a tough one, and thanks to Kbaumen for getting me a new toy
  8. Backside of desert
    Joined
    09 Nov '06
    Moves
    14828
    25 Nov '06 15:05
    thank you for the wonderful explanation.🙂
  9. SubscriberBigDoggProblem
    Court Jester
    lacking discretion
    Joined
    26 Nov '04
    Moves
    124154
    25 Nov '06 17:49
    Originally posted by iraqi insurgent
    oh and a strange woman with humongous knockers making tea...... alls not lost then eh?.....
    As long as 'strange' doesn't refer to how she looks... 😵
  10. Joined
    06 Jul '06
    Moves
    1163
    25 Nov '06 20:26
    rofl
  11. Joined
    25 Nov '06
    Moves
    1434
    03 Dec '06 13:45
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