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Subject: Re: Interesting position, and game. (And here's another game.)

Author: Uri Blass

Date: 02:05:37 09/02/01

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COMP Hitech - COMP Deep Thought
North American Compu North American Compu, 1990

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.0-0 Bg7 5.c3 Nf6 6.Re1 0-0 7.d4 cxd4 8.cxd4 d5 9.e5
Ne4 10.Nc3 Nxc3 11.bxc3 Bg4 12.h3 Bf5 13.Bxc6 bxc6 14.Ba3 Rb8 15.Bc5 Qc7 16.Qc1
Rb7 17.Nh4 Be4 18.Qe3 Rfb8 19.f3 Bc2 20.Rec1 Ba4 21.f4 Bb5 22.f5 Kh8 23.e6 Bf6
24.exf7 Kg7 25.Nf3 gxf5 26.Re1 Kxf7 27.Qh6 Qg3 28.Qxh7+ Ke8 29.Qxf5 Qg7 30.Re6
Bc4 31.Rxc6 Kd8 32.Bd6 Bb5 33.Ne5 Bxe5 34.Bxe5 Qxe5 35.Qxe5 Bxc6 36.Qe6 Rb1+
37.Rxb1 Rxb1+ 38.Kh2 Rb6 39.g4 Bb7 40.Qg8+ Kc7 41.Qf7 Bc6 42.Qxe7+ Bd7 43.Qc5+
Rc6 44.Qxd5 Re6 45.Kg3 Re1 46.c4 Re2 47.Qa5+ Kb7 48.Qb4+ Kc8 49.Qa3 Kb8 50.d5
Re4 51.c5 Bxg4 1-0



Deep thought blundered by 26...Kxf7 when 26...Qg3 is good enough
and Deep Fritz can see nothing for white even after 26...Qg3

see analysis:
COMP Hitech - COMP Deep Thought
1r6/pr2pPkp/2p2b2/1bBp1p2/3P4/2P1QNqP/P5P1/R3R1K1 w - - 0 1

Analysis by Deep Fritz:

27.f8Q+--
  ³  (-0.28)   Depth: 1/4   00:00:00
27.f8Q+-- Rxf8
  µ  (-0.97)   Depth: 1/5   00:00:00
27.Ne5!
  µ  (-0.87)   Depth: 1/9   00:00:00
27.Ne5! Bxe5
  =  (-0.25)   Depth: 1/9   00:00:00
27.Qe6!
  =  (0.22)   Depth: 1/9   00:00:00
27.Qe6 f4
  =  (0.06)   Depth: 2/7   00:00:00
27.Qe6 Bc4 28.Ne5 Bxe5
  =  (0.13)   Depth: 3/16   00:00:00
27.Qe6 Bc4 28.Qxf5 Kxf7 29.Ne5+ Ke8
  =  (0.25)   Depth: 4/19   00:00:00  2kN
27.Qe6--
  =  (-0.06)   Depth: 5/20   00:00:00  11kN
27.Qe6--
  =  (-0.06)   Depth: 5/20   00:00:00  12kN
27.Qe6 Bc4 28.Bb4 f4 29.Ne5 Bxe5 30.Rxe5
  =  (0.03)   Depth: 6/24   00:00:00  53kN
27.Qe6 Bc4 28.Bb4 a5 29.f8Q+ Rxf8 30.Bxa5
  =  (-0.22)   Depth: 7/25   00:00:00  147kN
27.Qe6 Bc4 28.Bb4 a5 29.Ba3 f4 30.Bc5 Rb2
  ³  (-0.28)   Depth: 8/27   00:00:00  451kN
27.Ne5!
  =  (-0.25)   Depth: 8/27   00:00:01  638kN
27.Ne5! Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Kxf7 31.Rae1 Kf6 32.Rxe7
  =  (-0.22)   Depth: 8/27   00:00:01  649kN
27.Ne5 Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Kxf7 31.Rae1 Kf6 32.Rxe7
  =  (0.00)   Depth: 9/22   00:00:01  902kN
27.Ne5 Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Kxf7 31.Rae1 e6 32.Rxe6 a6
  =  (-0.19)   Depth: 10/28   00:00:04  2663kN
27.Ne5 Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Kxf7 31.Rae1 e6 32.Rxe6 a6
  =  (-0.12)   Depth: 11/28   00:00:10  6516kN
27.Ne5 Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Bc4 31.Rf5 Rf8 32.Rxf4 Rxf7
  =  (-0.12)   Depth: 12/30   00:00:17  11252kN
27.Ne5 Qxe3+ 28.Rxe3 f4 29.Ree1 Bxe5 30.Rxe5 Bd3 31.Rae1 Rf8 32.Rxe7 Rxf7
  =  (-0.06)   Depth: 13/33   00:00:40  26406kN
27.Ne5 Qxe3+ 28.Rxe3 Bxe5 29.Rxe5 Bd3 30.Bxe7 Kxf7 31.Bd6 Rg8 32.Rae1 Be4
  =  (-0.25)   Depth: 14/35   00:01:37  64133kN
27.a4!
  =  (-0.22)   Depth: 14/38   00:04:51  192607kN
27.a4 Bc4 28.Ne5 Qxe3+ 29.Rxe3 f4 30.Ree1 Bxe5 31.Rxe5 Rf8 32.Bxe7 Rxf7
  =  (-0.06)   Depth: 15/40   00:13:10  529732kN

(Blass, Tel-aviv 02.09.2001)


later move on the game 30...Bc4 sugggests that
deep thought did not search deep enough(Deep Fritz on p800 needed
only 18 seconds to fail low on 30...Bc4 and
20 seconds to change it's mind).

COMP Hitech - COMP Deep Thought
1r2k3/pr2p1q1/2p1Rb2/1bBp1Q2/3P4/2P2N1P/P5P1/R5K1 b - - 0 1

Analysis by Deep Fritz:

30...Qxg2+--
  +-  (5.81)   Depth: 1/3   00:00:00
30...Qxg2+-- 31.Kxg2
  +-  (8.31)   Depth: 1/3   00:00:00
30...Bxd4+!
  +-  (5.41)   Depth: 1/3   00:00:00
30...Bxd4+! 31.cxd4
  +-  (3.28)   Depth: 1/3   00:00:00
30...Qg3!
  +-  (3.16)   Depth: 1/5   00:00:00
30...Qg3!
  ²  (0.44)   Depth: 1/5   00:00:00
30...Qg3--
  ±  (1.06)   Depth: 2/3   00:00:00
30...Qg3-- 31.Qxf6 Qh4
  +-  (3.91)   Depth: 2/4   00:00:00
30...Bc4!
  +-  (3.78)   Depth: 2/6   00:00:00
30...Bc4! 31.Rxc6
  ²  (0.69)   Depth: 2/6   00:00:00
30...Bc4 31.Ne5 Bxe5 32.Qxe5
  ±  (0.75)   Depth: 3/13   00:00:00  1kN
30...Bc4 31.Rxc6 Kd8 32.Qe6
  ±  (1.00)   Depth: 4/12   00:00:00  2kN
30...Kd8!
  ±  (0.97)   Depth: 4/14   00:00:00  2kN
30...Kd8! 31.Ne5 Qg3 32.Nxc6+ Bxc6
  ±  (0.78)   Depth: 4/14   00:00:00  3kN
30...Kd8 31.Ne5 Qg3 32.Nf7+ Kc7 33.Bxe7 Qxc3
  ±  (0.87)   Depth: 5/22   00:00:00  9kN
30...Kd8--
  ±  (1.19)   Depth: 6/21   00:00:00  38kN
30...Kd8-- 31.Bd6 Rc8 32.Be5 Bxe5 33.Qxe5 Qh7
  ±  (1.25)   Depth: 6/21   00:00:00  44kN
30...Bc4!
  ±  (1.22)   Depth: 6/25   00:00:00  93kN
30...Bc4! 31.Rxc6 Kd8 32.Ne5 Bxe5 33.Qxe5 Qh7
  ±  (1.00)   Depth: 6/25   00:00:00  106kN
30...Bc4 31.Rae1 Rb2 32.Qg4 Qxg4 33.hxg4 Kf7 34.Bxa7
  ±  (1.22)   Depth: 7/21   00:00:00  203kN
30...Ba4!
  ±  (1.19)   Depth: 7/23   00:00:00  263kN
30...Ba4! 31.Rae1 Kd8 32.Ne5
  ±  (1.16)   Depth: 7/26   00:00:00  313kN
30...Ba4 31.Rae1 Kd8 32.Ne5 a5 33.Nxc6+ Bxc6 34.Rxc6
  ±  (1.31)   Depth: 8/21   00:00:00  508kN
30...Bc4!
  ±  (1.28)   Depth: 8/23   00:00:01  610kN
30...Bc4! 31.Rxc6 Kd8 32.Ne5 Bxe5 33.Qxe5 Qxe5 34.dxe5
  ±  (1.25)   Depth: 8/24   00:00:01  736kN
30...Bc4 31.Rae1 Rb2 32.g4 Kd8 33.Ne5 Bxe5 34.Qxe5 Qxe5 35.R1xe5 Rxa2 36.Rxe7
  +-  (1.53)   Depth: 9/27   00:00:02  1786kN
30...Bc4 31.Rae1 Rb2 32.g4 Kd8 33.Ne5 Bxe5 34.Qxe5 Qxe5
  +-  (1.53)   Depth: 10/29   00:00:07  4510kN
30...Bc4--
  +-  (1.84)   Depth: 11/28   00:00:12  7772kN
30...Bc4-- 31.Rae1 Kd8 32.Ne5 Bxe5 33.R1xe5 Rb1+ 34.Kh2 Rf1 35.Qg5 Qxg5
  +-  (2.69)   Depth: 11/31   00:00:18  11894kN
30...Ba4!
  +-  (2.66)   Depth: 11/32   00:00:20  13286kN
30...Ba4! 31.Rae1 Kd8 32.Ne5 Qg8 33.Ng6 Rb2 34.Bxe7+
  +-  (2.28)   Depth: 11/32   00:00:28  18297kN
30...Kd8!
  +-  (2.25)   Depth: 11/32   00:00:34  21992kN
30...Kd8! 31.Rae1 Rd7 32.Ne5 Bxe5 33.Qxe5 Qxe5 34.R1xe5 Rbb7 35.g4 Bc4 36.a3
  +-  (2.16)   Depth: 11/33   00:00:41  26699kN
30...Kd8 31.Rae1 Rd7 32.Ne5 Bxe5 33.Qxe5 Qxe5 34.R1xe5 Rbb7 35.g4 Bc4
  +-  (2.31)   Depth: 12/33   00:01:14  48349kN
30...Kd8 31.Rae1 Rd7 32.Ne5 Bxe5 33.Qxe5 Qxe5 34.R1xe5 Rbb7 35.g4 Bc4 36.a4
  +-  (2.37)   Depth: 13/33   00:02:20  90686kN

(Blass, Tel-aviv 02.09.2001)

Uri



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