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Subject: Re: how much time do your program need to avoid hxg5

Author: blass uri

Date: 02:38:47 05/02/99

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On May 01, 1999 at 20:15:54, Francis Monkman wrote:

>During a game with Genius4 in 95, the following position arose
>after 17 moves by each side:
>
>White: Pa2,b2,c4,e5,f4,g2,h2 Ng3,g5 Bc1 Ra1,f1 Qe2 Kh1
>Black: Pa7,b7,c6,e6,f7,g7,h6 Na6,b6 (!) Bc5 Ra8,f8 Qe7 Kg8
>
>White was pleased to find the continuation:
>
>18 f5! hxg5

r4rk1/pp2qpp1/nnp1p2p/2b1P1N1/2P2P2/6N1/PP2Q1PP/R1B2R1K w - - 0

after the move 18.f5 the move hxg5 is a mistake.

Junior5.4 suggests Qc7 after a long time(almost 3 hours on pentium200MMX)
main line begin with 18...Qc7 19.f6 g6 20.Nf3 h5 21.Rd1 Rfd8....

Uri
>19 f6 gxf6
>20 Ne4 Rfd8
>21 Nxf6+ Qxf6
>22 Rxf6 Nd7
>23 Bxg5 Nxf6
>24 Bxf6 Kf8
>25 Qh5 Ke8
>26 Rf1 resigns
>
>It would seem obvious that White is winning within a 9-ply search,

no it is not obvious.
The fact that it is obvious that after 9 plies of the game black is losing does
not prove that after 9 plies of search black is losing.

white cannot find 19.f6 because it is afraid from different lines(not the game
line).

Uri

• Re: how much time do your program need to avoid hxg5 Francis Monkman 05:10:59 05/02/99
• Re: I am not sure if hxg5 and maybe black cannot sve the position. blass uri 02:54:47 05/02/99
  • Re: I am not sure if hxg5 and maybe black cannot sve the position. Francis Monkman 05:15:59 05/02/99
    • Re: I am not sure if hxg5 and maybe black cannot sve the position. blass uri 06:04:43 05/02/99
      • Re: I am not sure if hxg5 and maybe black cannot sve the position. Dave Gomboc 09:23:57 05/02/99
        • Re: I am not sure if hxg5 and maybe black cannot sve the position. blass uri 12:01:26 05/02/99
          • Re: I am not sure if hxg5 and maybe black cannot sve the position. Francis Monkman 15:26:19 05/02/99
        • Re: I am not sure if hxg5 and maybe black cannot sve the position. Francis Monkman 10:20:29 05/02/99
          • Re: I am not sure if hxg5 and maybe black cannot sve the position. Dave Gomboc 10:24:48 05/02/99
      • Re: I am not sure if hxg5 and maybe black cannot sve the position. Francis Monkman 07:10:10 05/02/99
        • Re: I am not sure if hxg5 and maybe black cannot sve the position. blass uri 08:04:24 05/02/99
          • Re: I am not sure if hxg5 and maybe black cannot sve the position. Francis Monkman 08:43:27 05/02/99
            • Re: we need more than 9 plies to prove that black is losing . blass uri 09:30:41 05/02/99
              • Re: we need more than 9 plies to prove that black is losing . Francis Monkman 10:17:50 05/02/99
                • Re: we need more than 9 plies to prove that black is losing . Dann Corbit 16:09:23 05/03/99

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