Author: Dann Corbit
Date: 12:13:10 05/21/01
Go up one level in this thread
On May 21, 2001 at 13:06:51, Andreas Schwartmann wrote:
>I received an e-mail today asking me for help on GS 2930 test suite position
>#13. My chess abilities are not good enough, I am afraid, but what do you think
>about this? Here comes the mail:
>
>Andreas,
>
>I have been using the GS 2930 test suite to estimate the rating for the
>Deep Blue system. This is for use in a paper we are preparing. I
>downloaded the test suite from your web site. There are three problems
>that the system does not solve in 20 minutes. One of them in particular,
>#13, is not solved even for very deep searches. The given move is Bxg7,
>but Deep Blue Jr. gives a different move that has a somewhat higher score
>than Bxg7. The PV follows. Do you have any opinion on this? Thank you.
>
>Regards,
>
>Murray
>
>Rh5 Qc2 Qe7 Qb2 Ne5 Rc1 g4 Rf1 Kf1 Qb1 Kg2 Qe4 Kh3 Qb1 Rf5 Qf1 Kh4 Qg2 h3
>Qa8 Rf7 +1.49
It is not inconceivable that there are two good answers. Perhaps Vincent, Come,
or Djorde could comment.
Here is the game in question that the position comes from [move 21]:
[Event "?"]
[Site "?"]
[Date "1983.??.??"]
[Round "?"]
[White "Kasparov, Gary"]
[Black "Portisch, Lajos"]
[Result "1-0"]
[WhiteElo "2690"]
[BlackElo "2620"]
[ECO "E12"]
[Opening "Queen's Indian defence "]
[Variation "4.Nc3"]
1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e3 Nxc3
( 7...Nc6 8.Ne5 Qd6 9.Qa4 )
8.bxc3 Be7 9.Bb5+ c6 10.Bd3 c5 11.O-O Nc6 12.Bb2 Rc8 13.Qe2 O-O 14.Rad1
Qc7 15.c4 cxd4 16.exd4 Na5 17.d5 exd5
( 17...Nxc4 18.Qe4 g6 19.Bxc4 Qxc4 20.Qe5 f6 21.Qxe6+ Rf7 22.Rc1 $7 )
18.cxd5 Bxd5 19.Bxh7+ Kxh7 20.Rxd5 Kg8 21.Bxg7 Kxg7 22.Ne5 Rfd8 23.Qg4+
Kf8 24.Qf5 f6
( 24...Bd6 25.Qf6 )
25.Nd7+ Rxd7
( 25...Kf7 26.Qh7+ Ke6 27.Re1+ Kxd5 28.Qe4+ Kd6 29.Qe6# )
26.Rxd7 Qc5 27.Qh7 Rc7 28.Qh8+
( 28.Rd3 Qxf2+ 29.Kxf2
( 29.Rxf2 Rc1+ 30.Rf1 Bc5+ )
29...Bc5+ )
28...Kf7 29.Rd3 Nc4 30.Rfd1 Ne5 31.Qh7+ Ke6
( 31...Kf8 32.Rd8+ )
32.Qg8+ Kf5 33.g4+ Kf4 34.Rd4+ Kf3 35.Qb3+ Qc3 36.Qd5+ Ke2 37.Qe4+ 1-0
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