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Subject: Re: Shredder 6 test: GambitTiger 2

Author: Uri Blass

Date: 05:06:38 01/01/02

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On January 01, 2002 at 04:38:44, Harald Faber wrote:

>After an intermediate 4.5-2.5 in favour of Shredder, GambitTiger 2 could win the
>last three games in a row so that the final result was 4.5-5.5. In the 8th game
>Shredder's eval jumped from +0.4 to -2 after Tiger's move, and furhtermore
>decreased to -4 another move later. Strange, such eval jumps are very seldom in
>Tiger.

It seems that Shredder is simply weaker than Deep Fritz both in positional
understanding and in tactics.
Here is Deep Fritz's opinion:

Deep Fritz never see advantage for white and can see a clear advantage for black
and also suggests the only move g4 in only 2 seconds

Shredder 6,K - GambitTiger 2,K
1Q6/5qkp/5p2/3pn3/P3b3/4P1P1/5P1P/R5K1 w - - 0 1

Analysis by Deep Fritz:

36.Qxe5--
  -+  (-2.94)   Depth: 1/2   00:00:00
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.h3 Nf3+ 37.Kf1 Qd7 38.h4 d4 39.exd4
  =  (-0.19)   Depth: 5/15   00:00:00  7kN
36.Qc8!
  =  (0.00)   Depth: 5/16   00:00:00  11kN
36.Kf1!
  =  (-0.12)   Depth: 5/16   00:00:00  14kN
36.Kf1 Nf3 37.g4 d4 38.a5 Qc4+ 39.Kg2
  =  (-0.12)   Depth: 6/19   00:00:00  38kN
36.h3!
  =  (-0.09)   Depth: 6/19   00:00:00  47kN
36.h3 Nf3+ 37.Kf1 d4 38.exd4 Qc4+ 39.Kg2 Nxd4+ 40.Kh2 Nf3+ 41.Kh1
  =  (0.00)   Depth: 7/20   00:00:00  96kN
36.h3--
  ³  (-0.31)   Depth: 8/23   00:00:00  199kN
36.h3-- Qd7 37.g4 h5 38.Qb5 Nf3+ 39.Kf1 Qc8 40.a5
  ³  (-0.34)   Depth: 8/23   00:00:00  215kN
36.Qc8!
  ³  (-0.31)   Depth: 8/23   00:00:00  361kN
36.Qc8! Qh5 37.h4 Qf3 38.Qh3 Nd3 39.Ra2 Qd1+
  =  (-0.19)   Depth: 8/23   00:00:00  396kN
36.Qc8--
  ³  (-0.50)   Depth: 9/21   00:00:00  521kN
36.Qc8--
  ³  (-0.50)   Depth: 9/26   00:00:01  853kN
36.g4!
  ³  (-0.47)   Depth: 9/26   00:00:02  1726kN
36.g4! h5 37.Rc1 Qg6 38.Rc7+ Nf7 39.Rc8 Kh7 40.Qg3 hxg4 41.Qh4+ Kg7
  ³  (-0.31)   Depth: 9/26   00:00:03  2053kN
36.g4 h5 37.Rc1 Qe6 38.Rc7+ Nf7 39.Qc8 Qxc8 40.Rxc8 hxg4 41.a5 Ne5
  ³  (-0.31)   Depth: 10/28   00:00:07  4787kN
36.g4 d4 37.exd4 Qd7 38.Ra3 Qxd4 39.Qc7+ Kg6 40.Qc1 Nxg4 41.Ra2 Kg7
  ³  (-0.59)   Depth: 11/30   00:00:21  12799kN
36.g4 d4 37.exd4 Nf3+ 38.Kg2 Qc4 39.Ra3 Nxd4+ 40.Kg3 Nc2 41.Rb3 Qxa4
  ³  (-0.62)   Depth: 12/34   00:00:53  33721kN
36.g4 d4 37.exd4 Qd7 38.Ra3 Qxd4 39.Qc7+ Kg6 40.Qc1 Nxg4 41.Qf1 Ne5
  µ  (-0.72)   Depth: 13/35   00:02:18  89756kN
36.g4 Qe6 37.h3 h5 38.f4 Nd7 39.f5 Bxf5 40.Qg3 hxg4 41.hxg4 Be4
  µ  (-0.91)   Depth: 14/36   00:06:22  249856kN
36.g4 Qe6 37.h3 h5 38.f4 Nd7 39.f5 Bxf5 40.Qg3 hxg4 41.hxg4 Be4
  µ  (-0.91)   Depth: 15/40   00:26:03  1030517kN

(Blass, Tel-aviv 01.01.2002)

Next best at depth 13 and 14 from Fritz point of view is Kf1

36.Kf1! Qe6 37.Qb7+ Kg6 38.Ke1 Qh3 39.Qb5
  -+  (-1.75)   Depth: 13/37   00:35:19  249590kN
36.Kf1 Qh5 37.Rb1 Bd3+ 38.Kg1 Qf3 39.Rb7+ Kh6 40.Qf8+ Kg5 41.Qg8+ Ng6
  -+  (-1.97)   Depth: 14/37   00:38:59  390931kN

(Blass, Tel-aviv 01.01.2002)


It seems that 36.g4 is simply forced for tactical reasons so I do not understand
shredder's 36.f4

After shredder's 36.f4 Deep Fritz gets the following analysis on p800

Shredder 6,K - GambitTiger 2,K
1Q6/5qkp/5p2/3pn3/P3bP2/4P1P1/7P/R5K1 b - f3 0 1

Analysis by Deep Fritz:

36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Nxh2 38.a5 Nf3 39.a6 Qg6 40.Qc7+ Kg8
  µ  (-0.97)   Depth: 6/16   00:00:00  9kN
36...Nf3+ 37.Kf2 Qh5 38.h4 Nxh4 39.Qa7+ Kg6 40.Qd4 Nf3
  µ  (-0.97)   Depth: 7/20   00:00:00  43kN
36...Nf3+!
  µ  (-1.28)   Depth: 8/22   00:00:00  104kN
36...Nf3+!
  -+  (-1.59)   Depth: 9/24   00:00:00  291kN
36...Nf3+! 37.Kf2 Qh5 38.Qc7+ Kh6 39.h4 Nxh4 40.Qc3 Qf3+ 41.Ke1 Ng2+ 42.Kd2
  -+  (-1.69)   Depth: 9/25   00:00:00  446kN
36...Nf3+!
  -+  (-2.00)   Depth: 10/28   00:00:01  884kN
36...Nf3+ 37.Kf2 Qh5 38.h4 Nxh4 39.g4 Qxg4 40.Rg1 Ng2 41.Qa7+ Kg8
  -+  (-2.28)   Depth: 11/33   00:00:06  4030kN
36...Nf3+ 37.Kf2 Qh5 38.h4 Nxh4 39.g4 Qxg4 40.Rg1 Ng2 41.Qc7+
  -+  (-2.50)   Depth: 12/33   00:00:19  12594kN
36...Nf3+!
  -+  (-2.81)   Depth: 13/33   00:00:29  18975kN
36...Nf3+!
  -+  (-3.13)   Depth: 14/36   00:01:19  53474kN
36...Nf3+! 37.Kf2 Qh5 38.h4 Nxh4 39.g4 Qxg4 40.Rg1 Ng2 41.Qc7+
  -+  (-3.25)   Depth: 14/38   00:02:23  97965kN
36...Nf3+!
  -+  (-3.56)   Depth: 15/38   00:03:55  158269kN

(Blass, Tel-aviv 01.01.2002)


Uri



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