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Subject: Did Genius3 blunder when it played 22...Qxa2 against kasparov

Author: Uri Blass

Date: 01:06:05 09/14/02

Here is some analysis after 22...Qxa2 23.Rd7

You can see that old Deep Fritz still see a clear advantage for black(1.09
pawns)
Qb3 is not forced and it may be interesting to have better analysis by better
hardware(I used P850 128 mbytes hash tables)

When I clicked next best Deep Fritz told me 23...b5 -1.03/14

G.Kasparov - Genius3
[D]r4rk1/1p1R2bp/p1p3p1/8/6Q1/4BP1P/qP3P2/5RK1 b - - 0 1

Analysis by Deep Fritz:

23...Qxb2!
  -+  (-1.69)   Depth: 1/4   00:00:00
23...Qxb2!
  -+  (-2.69)   Depth: 1/4   00:00:00
23...Qxb2--
  -+  (-2.38)   Depth: 2/6   00:00:00
23...Qxb2-- 24.Rfd1
  -+  (-2.28)   Depth: 2/6   00:00:00
23...Qxb2 24.Rfd1 Qe2
  -+  (-2.38)   Depth: 3/11   00:00:00
23...Qxb2 24.Rfd1 Qe2 25.Qe6+ Kh8
  -+  (-2.41)   Depth: 4/12   00:00:00  2kN
23...Qxb2 24.Rfd1 Rae8 25.Bc5 Rf7
  -+  (-2.28)   Depth: 5/16   00:00:00  10kN
23...Qxb2 24.Rfd1 Rae8 25.Bc5 Rf5 26.Bd4
  -+  (-2.31)   Depth: 6/18   00:00:00  24kN
23...Qxb2 24.Rfd1 Rae8 25.Bc5 Rf5 26.Bd4 Bxd4 27.R1xd4 Re1+ 28.Kg2
  -+  (-2.34)   Depth: 7/18   00:00:00  109kN
23...Qxb2 24.Qc4+ Kh8 25.Qh4 Rg8 26.Rfd1 Qe2 27.R1d2 Qe1+ 28.Kg2
  -+  (-2.22)   Depth: 8/20   00:00:00  243kN
23...Qxb2 24.Qc4+ Kh8 25.Qh4 Qf6 26.Qxf6 Bxf6 27.Rxb7 Be5 28.Rc1 Rxf3 29.Rxc6
  -+  (-2.06)   Depth: 9/24   00:00:01  655kN
23...Qxb2 24.Qc4+ Kh8 25.Qh4 Qf6 26.Qxf6 Bxf6 27.Rxb7 Be5 28.f4 Bxf4 29.Rfb1
  -+  (-1.91)   Depth: 10/25   00:00:03  2038kN
23...Qxb2 24.Qc4+ Kh8 25.Qh4 Qf6 26.Qxf6 Bxf6 27.Rxb7 Be5 28.Kg2 Rab8 29.Rfb1
  -+  (-1.81)   Depth: 11/28   00:00:09  6045kN
23...Qb3!
  -+  (-1.84)   Depth: 11/28   00:00:15  10154kN
23...Qb3! 24.Rfd1 Rae8 25.Bc5 Rf5 26.Rd8 Qe6 27.b3 Rxd8 28.Rxd8+ Kf7 29.b4
  -+  (-1.88)   Depth: 11/31   00:00:18  11995kN
23...Qb3 24.Rfd1 Rae8 25.Bc5 Rf5 26.Rd8 Qe6 27.b4 Be5 28.R8d7 Qb3 29.Kg2
  -+  (-1.88)   Depth: 12/30   00:00:38  25999kN
23...Qb3 24.Rfd1 Rae8 25.Bc5 Rf5 26.Rd8 Qe6 27.Qb4 Rg5+ 28.Kh2 Be5+ 29.f4
  -+  (-1.81)   Depth: 13/33   00:01:32  62914kN
23...Qb3 24.Rfd1 Rae8 25.Bc5 Rf5 26.Rd8 Qe6 27.Qb4 Rg5+ 28.Kh2 Be5+ 29.f4
  -+  (-1.81)   Depth: 14/35   00:05:57  245638kN
23...Qb3--
  -+  (-1.50)   Depth: 15/37   00:12:09  503811kN
23...Qb3--
  -+  (-1.50)   Depth: 15/39   00:19:57  828708kN
23...Qb3 24.Rfd1 Rae8 25.R1d6 Rf7 26.Rd3 Qe6 27.Qxe6 Rxe6 28.Rd8+
  -+  (-1.50)   Depth: 16/39   00:54:30  2275419kN
23...Qb3 24.Rfd1 Rae8 25.Kg2 Rf5 26.R1d6 Bf6 27.Bd4 Rg5
  µ  (-1.25)   Depth: 17/43   02:12:05  5421062kN
23...Qb3 24.Rfd1 Rae8 25.Kg2 Rf5 26.R1d6 Bf6 27.Bd4 Rg5 28.Bxf6 Rxg4+
  µ  (-1.09)   Depth: 18/44   05:37:25  14023835kN

(blass, tel-aviv 14.09.2002)

Here is the first position when it was claimed in the winboard forum that
Genius3 blundered

[D]r4rk1/1p4bp/p1p3p1/3q4/6Q1/4BP1P/PP3P2/3R1RK1 b - - 0 22

I am not sure if Qxf3 is better because after Qxf3 Rd7 Qxg4 hxg4 Rf7 Rfd1 it
seems that white has rook on the 7th for the pawn and white may have enough
compensation to draw.

Uri

Re: Did Genius3 blunder when it played 22...Qxa2 against kasparov Eduard Nemeth 03:38:34 09/14/02
- Re: Did Genius3 blunder when it played 22...Qxa2 against kasparov Uri Blass 05:31:21 09/14/02
- Re: Genius 65 hold it ! Eduard Nemeth 04:03:32 09/14/02
  - Re: Strong Analysis from Fritz 7.008 ! Eduard Nemeth 04:11:12 09/14/02
    - Re: Strong Analysis from Fritz 7.008 ! general question Rolf Tueschen 06:14:12 09/14/02
      - Re: general answer Eduard Nemeth 07:52:03 09/14/02
Re: Did Genius3 blunder when it played 22...Qxa2 against kasparov Kurt Utzinger 01:27:44 09/14/02
- Re: Did Genius3 blunder when it played 22...Qxa2 against kasparov Uri Blass 01:35:55 09/14/02
  - Re: Did Genius3 blunder when it played 22...Qxa2 against kasparov Uri Blass 02:17:03 09/14/02

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