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Subject: Re: Can any program reproduce the closing moves of the evergreen game?

Author: Dann Corbit

Date: 19:08:20 12/15/98

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After ten minutes Crafty still likes Rxe7, but does not see the same line as was
actually played out.  It seems fairly obvious now, that the best defense was to
simply ignore the offer.  So this one was a real sucker punch.

12->  10:23   1.16 1. Rxe7+ Kd8 2. Rxd7+ Kc8 3. Rd8+ Kxd8
                   4. Bf5+ Qxd1+ 5. Qxd1+ Nd4 6. Bh3 Be4
                   7. cxd4 Ba5 8. Be7+ Ke8 9. Qa4+ c6
                   10. g3 Rb1+ 11. Bf1 Bb6

For the second game, the queen sacrifice was seen instantly.  So an auxilliary
question is, how far back can we take it in the sequence and still see the mate?
 Even though it is not very deep, this would have to be regarded as a true and
irrefutable sacrifice, would it not?

  2   0.00 Mat02 1. Qf6+ Nxf6 2. Be7#
  2->   0.01 Mat02 1. Qf6+ Nxf6 2. Be7#
              time=0.01  cpu=100%  mat=-12  n=771  fh=81%  nps=10000
              ext-> checks=40 recaps=4 pawns=0 1rep=11
              predicted=0  nodes=771  evals=259
              endgame tablebase-> probes done=0  successful=0



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