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  1. Standard member JonathanB of London
    Curb Your Enthusiasm
    25 Mar '08 16:12 / 3 edits
    Following the recent mate in 9 thread Thread 90174, here's another chance to find a forced mate ...

    Black to play and force mate...




    It's pretty tough - I failed to solve it anyway. The answer - and a clue/easier version of the puzzle - can be found here:-

    http://streathambrixtonchess.blogspot.com/2008/03/king-hunt.html


    btw: the position comes from Hoffman-Petroff, Warsaw 1844 and I found it in Nunn/Cozens' book "The King Hunt"
  2. 25 Mar '08 16:40
    Originally posted by JonathanB of London
    Following the recent mate in 9 thread Thread 90174, here's another chance to find a forced mate ...

    [b]Black to play and force mate...


    [fen]r1bN1rk1/pppp2pp/8/2bnP3/8/6K1/PB4PP/RN1Q3R[/fen]


    It's pretty tough - I failed to solve it anyway. The answer - and a clue/easier version of the puzzle - can be found here:-

    h ...[text shortened]... comes from Hoffman-Petroff, Warsaw 1844 and I found it in Nunn/Cozens' book "The King Hunt"[/b]
    I must be missing something...

    1... Bf2+
    2 Kg4 d6+
    if
    3 Kh5 Nf4+
    4 Kg5 h6#
    if
    3 Kg5 h6+
    4 Kg6 (or Kh5) Nf4#

    1... Bf2+
    2 Kh3 d6+
    3 Qg4 Nf4#
  3. 25 Mar '08 16:46 / 1 edit
    1... Bf2+
    2 Kh3 d6+
    3 g4 Nf4#
  4. Standard member JonathanB of London
    Curb Your Enthusiasm
    25 Mar '08 16:51
    Originally posted by Green Paladin
    1... Bf2+
    2 Kh3 d6+
    3 g4 Nf4#
    OK,
    1. ... Bf2+
    2. Kh3 d6+

    is correct but what about

    3. e6
  5. Standard member JonathanB of London
    Curb Your Enthusiasm
    25 Mar '08 16:52 / 1 edit
    Originally posted by Green Paladin
    I must be missing something...
    yep - see my post above.
  6. 25 Mar '08 16:56
    Doh! All right, let me give this a bit more thought.
  7. 25 Mar '08 17:44
    How about this?

    1... Bf2+
    2 Kh3 d6+
    3 e6 Nf4+
    4 Kg4 Nxe6
    5 Nxe6 Bxe6+
    6 Kg5 h6+
    7 Kh5 Rf5+
    8 Kg4 Rf6+
    9 Kh5 g6+
    10 Kxh6 Be3#
  8. 25 Mar '08 17:55
    6... h6+
    7 Kg6 Bf5+
    8 Kh5 g6+
    9 Kxh6 Be3#
  9. 25 Mar '08 17:58
    6 Kh5 g6+
    7 Kh6 Be3#
  10. Standard member JonathanB of London
    Curb Your Enthusiasm
    25 Mar '08 18:05
    Originally posted by Green Paladin
    How about this?

    1... Bf2+
    2 Kh3 d6+
    3 e6 Nf4+
    4 Kg4 Nxe6
    5 Nxe6 Bxe6+
    6 Kg5 h6+
    7 Kh5 Rf5+
    8 Kg4 Rf6+
    9 Kh5 g6+
    10 Kxh6 Be3#
    nice one. :-)

    Petroff mated two moves faster if you want to keep looking but obviously your way is good enough!

    btw:
    Hoffman-Petroff reached your positoin after the 5th move (via a different move order). Seem to remember reading Black could have improved and held out a couple of moves longer but can't remember how. I wont have access to the book for a couple of days. I'll post the solution when I can.
  11. 25 Mar '08 18:05 / 1 edit
    7... Rf5+
    8 Kg6 Rg5#



    Whew! Thanks.
  12. Standard member JonathanB of London
    Curb Your Enthusiasm
    25 Mar '08 19:15
    Originally posted by Green Paladin
    7... Rf5+
    8 Kg6 Rg5#



    Whew! Thanks.
    but if 8. Kg4 it goes on a bit longer...

    I told you it was tough :-)
  13. 25 Mar '08 19:22 / 2 edits
    Originally posted by JonathanB of London
    but if 8. Kg4 it goes on a bit longer...

    I told you it was tough :-)
    My first solution gives 8 Kg4. This is just a variation.

    Edit: The variation below wasn't in response to your post... we posted at the same time then I edited mine. Sorry for the confusion.

    7... Rf5+
    8 Kg6 Rg5#