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Subject: Re: NEWS: brilliant moves by DeepFritz

Author: Uri Blass

Date: 11:24:07 04/09/01

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On April 09, 2001 at 12:54:37, Thomas Lagershausen wrote:

>
>>
>>Deep Fritz found one move in more than 22 hours and another move in more than 16
>>hours on PIII800.
>>
>>The move that it found in more than 16 hours is probably a winning move.
>
>I am very,very interested in this brilliant moves by Deep Fritz.Please can you
>post it.

Here is my game

Abir Har aven - Uri Blass [A03]
[Blass,U]

 33554424kB, f5book.ctg. PentiumIII800
 1.f4 d5 2.g3 h5 3.Nf3 h4 4.Nxh4 e5 5.Ng2 Nf6 6.e3 Nc6 7.d3 Bg4 8.Be2 Qd7 9.Nd2
0-0-0 10.Nf1 Bd6 11.Bd2 exf4  -0.94/19  30:00:58  12.gxf4  12...Rh3  -1.06/20
24:02:45  13.c3 g5

10...Bd6 was result of more than 22 hours of search of Deep Fritz(pIII800 64
mbytes hash) but unfortunately I did not save the line and the score.
I thought about the move 10.Nf1 of GM har aven made that it cannot be a good
move and I wanted to punish the opponent for it.

I know that my opponent is a GM in correspondence games and I suspected that he
planned a trap for computers by this move.

I decided to give deep fritz more than 80 hours to search on PIII800(I hoped
that it is going to find a tactical win).

I did not trust the result of Deep Fritz and I tried to continue against other
programs that did not like Bd6.
I did not find problems with this move so I decided to play it.

Deep Fritz did not find a tactical win but I guess that it find a very good
positional move.
I was happy to see that it changed it's mind after more than 22 hours because I
guessed that Har aven did not plan something against this move.

All the move from move 10 are result of at least 24 hours of search of Deep
Fritz.

I did not save previous analysis of Deep fritz but I saved analysis of Deep
Fritz for 13...g5
and here it is:

Abir Har aven - Uri Blass
2kr4/pppq1pp1/2nb1n2/3p4/5Pb1/2PPP2r/PP1BB1NP/R2QKN1R b KQ - 0 1

Analysis by Deep Fritz:

13...Bxe2!
  =  (0.22)   Depth: 1/3   00:00:00
13...Bxe2! 14.Qxe2
  ³  (-0.38)   Depth: 1/3   00:00:00
13...Bf5!
  ³  (-0.41)   Depth: 1/6   00:00:00
13...Bf5 14.Ng3
  ³  (-0.28)   Depth: 2/4   00:00:00
13...Bxe2!
  ³  (-0.38)   Depth: 2/5   00:00:00
13...Bxe2! 14.Qxe2 Re8
  ³  (-0.44)   Depth: 2/6   00:00:00
13...Bxe2 14.Qxe2 Re8 15.0-0-0
  ³  (-0.28)   Depth: 3/8   00:00:00
13...Be6!
  ³  (-0.31)   Depth: 3/8   00:00:00
13...Be6! 14.Ng3
  ³  (-0.34)   Depth: 3/8   00:00:00
13...Be6 14.Rg1 Re8 15.Qb3
  ³  (-0.31)   Depth: 4/12   00:00:00  1kN
13...Bxe2!
  ³  (-0.34)   Depth: 4/12   00:00:00  1kN
13...Bxe2! 14.Qxe2
  ³  (-0.38)   Depth: 4/12   00:00:00  2kN
13...Bxe2 14.Qxe2 Re8 15.0-0-0 Qe7 16.Ng3
  =  (-0.25)   Depth: 5/16   00:00:00  10kN
13...Be6!
  ³  (-0.28)   Depth: 5/16   00:00:00  10kN
13...Be6! 14.Rg1 Re8 15.Qb3 Qe7
  ³  (-0.34)   Depth: 5/16   00:00:00  10kN
13...Rdh8!
  ³  (-0.38)   Depth: 5/20   00:00:00  16kN
13...Rdh8! 14.Bxg4 Nxg4 15.Qb3 Qe6 16.c4 dxc4
  ³  (-0.50)   Depth: 5/20   00:00:00  19kN
13...Rdh8 14.Bxg4 Nxg4 15.Qb3 Qe6 16.c4 dxc4 17.Qxc4 Qxc4
  ³  (-0.50)   Depth: 6/28   00:00:00  31kN
13...Rdh8 14.b4 Bxe2 15.Qxe2 Ng4 16.b5 Ne7 17.b6 cxb6
  ³  (-0.50)   Depth: 7/27   00:00:00  109kN
13...Rdh8 14.b4 Bxe2 15.Qxe2 Qe6 16.b5 Ne7 17.Rg1 Nf5
  ³  (-0.44)   Depth: 8/27   00:00:00  337kN
13...Rdh8 14.b3 Bxe2 15.Qxe2 Ng4 16.0-0-0 Nxh2 17.e4 Ba3+ 18.Kb1 Nxf1 19.Rhxf1
  ³  (-0.59)   Depth: 9/30   00:00:01  928kN
13...Rdh8 14.b3 Bxe2 15.Qxe2 Ng4 16.e4 Nxh2 17.Rxh2 Rxh2 18.exd5 Re8 19.Nxh2
  ³  (-0.59)   Depth: 10/29   00:00:02  1468kN
13...Rdh8 14.b3 Bxe2 15.Qxe2 Ng4 16.e4 Nxh2 17.Rxh2 Rxh2 18.exd5 Re8 19.Nxh2
  ³  (-0.59)   Depth: 11/39   00:00:05  3114kN
13...Rdh8 14.b3 Qe6 15.Rc1 g6 16.c4 d4 17.c5 Be7 18.Rc4 dxe3
  ³  (-0.56)   Depth: 12/36   00:00:27  17417kN
13...Re8!
  ³  (-0.59)   Depth: 12/36   00:00:39  25411kN
13...Re8! 14.b4 Ne7 15.Bxg4 Nxg4 16.Qe2 Reh8 17.e4 Nxh2 18.Rxh2 Rxh2 19.e5
  ³  (-0.69)   Depth: 12/39   00:01:03  40480kN
13...Re8 14.Rc1 Bxe2 15.Qxe2 Nh5 16.e4 f5 17.e5 Bxe5 18.fxe5 Nxe5
  ³  (-0.69)   Depth: 13/40   00:02:50  109196kN
13...Re8 14.b4 Bxe2 15.Qxe2 d4 16.0-0-0 Nd5 17.b5 dxc3 18.bxc6 cxd2+ 19.Kb2
  µ  (-0.81)   Depth: 14/41   00:07:09  267888kN
13...Re8 14.Bxg4 Nxg4 15.Qe2 d4 16.0-0-0 dxe3 17.Be1 Ne7 18.Bg3 Nd5 19.c4
  µ  (-0.97)   Depth: 15/43   00:20:24  781259kN
13...Re8 14.Bxg4 Nxg4 15.Qe2 d4 16.0-0-0 dxe3 17.Be1 Ne7 18.Bg3 Nd5 19.Rg1
  µ  (-0.94)   Depth: 16/44   00:30:51  1201442kN
13...Re8 14.Bxg4 Nxg4 15.Qe2 d4 16.0-0-0 dxe3 17.Be1 Nh6 18.Bg3 Nf5 19.d4
  µ  (-1.09)   Depth: 17/47   01:37:59  3892964kN
13...Re8 14.Bxg4 Nxg4 15.Qe2 g5 16.fxg5 Nce5 17.d4 Nf3+ 18.Kd1 Nxg5 19.Kc1
  µ  (-0.97)   Depth: 18/49   03:08:17  7642666kN
13...Re8 14.Bxg4 Nxg4 15.Qe2 f5 16.Rg1 d4 17.0-0-0 dxe3 18.Be1 Qe6 19.Kb1
  µ  (-1.03)   Depth: 19/48   09:21:04  23586724kN
13...g5!
  µ  (-1.06)   Depth: 19/50   16:29:00  42245850kN
13...g5! 14.fxg5 Ne5 15.Nf4 Nf3+ 16.Kf2 Bxf4 17.exf4 Nxd2 18.Ng3 Bxe2 19.Kxe2
  µ  (-1.16)   Depth: 19/51   19:22:30  49709144kN

(blass, tel-aviv 30.03.2001)


It is not careful to post analysis of my correspondence game during the game
because my opponent may read it and I am still not sure but only almost sure
that I am going to win inspite of the fact that I could prove by Fritz and a
chess tree that I have at least +1.5 pawns for myself after 13...g5.

g5 is a brilliant tactical move and I may analyze after the game if Bd6 is
really the best.

Uri



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