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Subject: Re: A position from a recent GM game

Author: Andrew Smith

Date: 20:13:04 01/08/02

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On January 08, 2002 at 18:50:33, Dadi Jonsson wrote:

>This is an interesting position from a game that was played by two GMs today:
>
>[D] 8/1p6/1b1qbk1p/p3ppp1/P1P3P1/1P3PNP/4QB2/6K1 b - -
>
>I believe that this is a hard position for programs. How do your programs
>evaluate the position?

Gambit tiger considers it for a while and then changes it's mind to Bxf2. Maybe
it is not completely clear if e4 is winning, I didn't bother to play through it
though. Maybe some other engine will choose this move.

New position
8/1p6/1b1qbk1p/p3ppp1/P1P3P1/1P3PNP/4QB2/6K1 b - - 0 1

Analysis by Gambit Tiger 2.0:

1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 Qxb3 4.Nxf5 Bxf5 5.gxf5 Kxf5
  ²  (0.26)   Depth: 6   00:00:00  27kN
1...Bxf2+ 2.Qxf2 Qd1+ 3.Kg2 Qxb3 4.Nxf5 Bxf5 5.gxf5 Kf7
  =  (0.06)   Depth: 6   00:00:00  47kN
1...Bxf2+ 2.Qxf2 Qd1+ 3.Kg2 f4 4.Ne4+ Kg7 5.Qc5 Qe2+ 6.Nf2 Kf7 7.Qc7+ Kf8 8.Qxb7
  =  (0.02)   Depth: 7   00:00:01  87kN
1...Bxf2+ 2.Qxf2 Qd1+ 3.Kg2 Qxb3 4.Nxf5 Bxf5 5.gxf5 Kxf5 6.Qe2 Qxa4 7.Qe4+ Ke6
8.Qxb7 Qxc4
  =  (0.00)   Depth: 8   00:00:02  183kN
1...Bxf2+ 2.Qxf2 Qd1+ 3.Kg2 Qxb3 4.Nxf5 Bxf5 5.gxf5 Kxf5 6.Qe2 Qxa4 7.Qe4+ Kf6
8.Qxb7 Qxc4
  =  (0.00)   Depth: 9   00:00:04  333kN
1...Bxf2+ 2.Qxf2 Qd1+ 3.Kg2 Qxb3 4.Nxf5 Bxf5 5.gxf5 Qxc4 6.Qb6+ Qc6 7.Qxa5 Qc2+
8.Kg1 Qxf5 9.Qb6+
  =  (0.04)   Depth: 10   00:00:09  706kN
1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 4.hxg4 Qxb3 5.Nh5+ Kf7 6.Qxe5 Qc2+ 7.Kg1 Qd1+
8.Kf2 Qd2+ 9.Kg1 Qd1+
  =  (0.15)   Depth: 11   00:00:50  3405kN
1...e4 2.Kg2 Bxf2 3.Qxf2 Qd3 4.gxf5 exf3+ 5.Qxf3 Qxf3+ 6.Kxf3 Bxf5 7.Nxf5 Kxf5
  =  (-0.02)   Depth: 11   00:02:04  8202kN
1...e4 2.Kg2 Bxf2 3.Qxf2 Qd3 4.gxf5 exf3+ 5.Qxf3 Qxf3+ 6.Kxf3 Bxf5 7.Nxf5 Kxf5
8.Kf2 b6
  ²  (0.38)   Depth: 12   00:03:21  13400kN
1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 4.hxg4 Qxb3 5.Nh5+ Kf7 6.Qxe5 Qc2+ 7.Kg1 Qd1+
8.Kf2 Qd2+ 9.Kg1 Qd1+
  =  (0.15)   Depth: 12   00:04:39  18907kN
1...Bxf2+ 2.Kxf2 Qd4+ 3.Kg2 f4 4.Nh5+ Kf7 5.Qc2 e4 6.Qxe4 Qxe4 7.fxe4 Bd7 8.Kf1
Bc6 9.e5 b6
  =  (0.08)   Depth: 13   00:08:42  38149kN

(only, MyTown 12.11.2001)




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