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Subject: Re: book bust?

Author: Dann Corbit

Date: 20:00:11 05/10/02

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On May 10, 2002 at 22:35:02, Jon Dart wrote:

>There's a known position in the Classical Nimzo-Indian as follows:
>
>[D] r4rk1/p4ppp/2P5/q1pp1b2/4n3/P7/1BQNPPPP/R3KB1R b KQ - -
>
>Crafty has a book line here continuing Rab8 c7. My database shows several games
>with this line, including Rogers-Ward, BCF ch-T 1997-8, a draw. Eliskases played
>d4 against Bololjubow in 1937, another draw. But a search from this position
>gives the continuation Ng3, with advantage to Black:
>
>
>               10     3.31     --   1. ... Ng3
>               10     3.99  -0.98   1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4.
>                                    Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8
>               10->  10.66  -0.98   1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4.
>                                    Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8
>               11    13.44     ++   1. ... Ng3!!
>               11->  29.14  -1.37   1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4.
>                                    Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8
>               12    34.77     --   1. ... Ng3
>               12    37.50  -0.87   1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1
>                                    4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7.
>                                    f3 d3 8. fxg4 Rxe2+
>               12->   1:55  -0.87   1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1
>                                    4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7.
>                                    f3 d3 8. fxg4 Rxe2+
>               13     2:07  -0.87   1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1
>                                    4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7.
>                                    f3 d3 8. fxg4 Rxe2+
>              time=3:20  cpu=99%  mat=3  n=133137602  fh=93%  nps=664k
>              ext-> chk=5470267 cap=361754 pp=602423 1rep=458117 mate=32558
>              predicted=0  nodes=133137602  evals=24036969
>              endgame tablebase-> probes done=0  successful=0
>              hashing-> trans/ref=22%  pawn=6%  used=99%
>
>Arasan and Hiarcs give a similar result, at least at a few minutes' search time.
>Ng3 is surprising, to say the least. Whether it's really good or not, I'm not
>sure.

Chess Tiger:
r4rk1/p4ppp/2P5/q1pp1b2/4n3/P7/1BQNPPPP/R3KB1R b KQ - ce 62; acd 15; acs 600; pv
Ng3 Bc3 Qd8 e4 Nxh1 g3 Be6 Bg2 d4 Bb2 c4 c7 Qxc7 Bxh1 d3;|Ne4g3



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