Christmas Tree

Gary Kevin Ware's "Problem of the Week"

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Christmas Tree

Postby garykevinware » 23 February 2012, 2:23 am

Here is another problem that I could have used for my article, Get In Shape!, http://main.uschess.org/content/view/8496/463. The problem, and next week's solution text are from the book, The Joys of Chess: Heroes, Battles & Brilliancies by Christian Hesse.



Birger A. Knudsen #2

2 points for sending me a complete variation to the problem, at garykevinware@yahoo.com , by next Wednesday.
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Re: Christmas Tree

Postby garykevinware » 1 March 2012, 1:16 am

Here is the answer to last week's problem:
Knudsen #2-
"In Knudsen's Christmas tree problem, the key lies precisely in not breaking the symmetry."
1 Qe4! "The key move intentionally maintains the symmetry, and forces Black to then break it. Mate is then guaranteed after each of the 21 possible ways of breaking the symmetry:"
1...fxe4 2 Bxg4#
1...dxe4 2 Bxc4#
1...f4 2 Bxg4#
1...d4 2 Bxc4#
1...Rgxe4 2 Ng5#
1...Rcxe4 2 Nc5#
1...Rg5 2 Nxg5# (2 Nf4#)
1...Rc5 2 Nxc5# (2 Nd4#)
1...Rf4 2 Nxf4# (2 Ng5#)
1...Rd4 2 Nxd4# (2 Nc5#)
1...Rc3 2 Nd4#
1...Rg3 2 Nf4#
1...Rb4 2 Nc5#
1...Rg4 2 Nf5#
etc.
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