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Subject: Has Shredder9 lost the tactical ability of Shredder 8?

Author: robert flesher

Date: 09:41:45 02/08/05

Here is a impressive clip from the chessbase site

Here the move 1.Nxh7!! leads to a convincing win. For instance 1...Kxh7 2.Qh3+
Kg8 3.f6 Nd4 4.Qh6 Ne6 5.Bxg6 fxg6 6.Rxd8 Bxg2+ 7.Kg1 Kf7 8.Qh7+ Ng7 9.Qxg7+ Ke6
10.Qe7 mate. The theme is repeated in other black defences: 1...Nd4 2.f6+ Kxh7
3. Qh3+ and Black is going to be mated after 3...Kg8 4.Qh6 Ne6 5.Bxg6 fxg6
6.Rxd8 Bxg2+ 7.Kg1 Kf7 8.Qh7+ Ng7 9.Qxg7+ Ke6 10.Qe7#; or 1...Rxd3 2.Rxd3 Kxh7
3.Qh3+ Kg8 4.Qh6 Nd4 5.fxg6 and mate to follow.

The key move 1.Nxh7 was found by the previous version of Shredder on a 1 GHz
PIII machine in 7 minutes and 20 seconds. Shredder 8 finds it in 1 minute 20
seconds.

Shredder has always been renowned for its excellent endgame technique. The
evaluation of passed pawns is much more accurate in the new version, and
combined with the increase in search depth this leads to the program's
recognising pawn marches more efficiently.


[D]3r1r2/pb3pkp/1pn2Np1/2p1PP2/8/b2BQ3/qP4PP/3R1R1K w - -

• So what DOES Shredder 9 play? nt stuart taylor 05:31:39 02/09/05
• Re: Has Shredder9 lost the tactical ability of Shredder 8? stuart taylor 05:27:14 02/09/05
• Re: Has Shredder9 lost the tactical ability of Shredder 8? James C. Logan 10:00:49 02/08/05
  • Then what is going on? Why doesn't my UCI version? Stephan? robert flesher 10:03:41 02/08/05
    • Re: Then what is going on? Why doesn't my UCI version? Stephan? Ingo Bauer 10:06:26 02/08/05
      • Re: Then what is going on? Why doesn't my UCI version? Stephan? John Merlino 12:04:28 02/08/05
      • The question is why is the same engine finding different moves? robert flesher 10:11:18 02/08/05
        • Re: The question is why is the same engine finding different moves? Ingo Bauer 10:17:14 02/08/05
• Shredder 9 analysis on a AMD 34000+ robert flesher 09:44:34 02/08/05
  • This position takes far longer on my 3400+ and Shredder 8 on a 1ghz? robert flesher 09:54:51 02/08/05
    • Re: This position takes far longer on my 3400+ and Shredder 8 on a 1ghz? Dann Corbit 10:41:44 02/08/05

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