Author: Dann Corbit
Date: 20:38:57 05/10/02
Go up one level in this thread
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.
Phalanx:
r4rk1/p4ppp/2P5/q1pp1b2/4n3/P7/1BQNPPPP/R3KB1R b KQ - -
-> increment adds 1440 s to soft time limit
-> soft time limit 3154.28 s
-> hard time limit 41599.9 s
5 -> 0:00.59 39276 0 turns
6 15 87 57406 Ne4-g3 Pe2-e4 Bf5xe4 Qc2-c3 Qa5xc3 Bb2xc3
Ng3xh1 Nd2xe4 Pd5xe4
6 -> 0:01.99 138632 0 turns
7 55 248 193127 Ne4-g3 Bb2-c3 Bf5xc2
7 -> 0:03.79 372939 0 turns
8 55 407 409204 Ne4-g3 ??
8 -31 493 545391 Ne4-g3 Bb2-c3 Qa5-c7 Qc2-a2 Ng3xh1 Qa2xd5
Bf5-e6 Qd5-e5
8 -> 0:12.93 1658738 0 turns
9 29 1540 1983694 Ne4-g3 !!
9 29 1806 2469555 Ne4-g3 Qc2-c3
9 30 4603 6688416 Ra8-b8 Pg2-g4 Ne4xd2
9 -> 0:56.12 8290622 1 turn
10 -3 13269 18823212 Ra8-b8 Pc6-c7 Rb8-b7 Bb2-e5 Rf8-e8 Pg2-g4
Re8xe5 Pg4xf5 Rb7xc7 Bf1-h3
10 2 13648 19409220 Ne4-g3 !
10 9 14012 20090639 Ne4-g3 Qc2-c3 Qa5xc3 Bb2xc3 Ng3xh1 Pg2-g3
Ra8-e8 Bf1-g2 Bf5-d3 Bg2-f3 Re8-e7 Pc6-c7
10 -> 3:42.41 31495538 1 turn
11 28 23963 34057580 Ne4-g3 Qc2-c3 Qa5xc3 Bb2xc3 Ng3xh1 Nd2-b3
Ra8-c8 Nb3xc5 Rc8xc6 Bc3-d4 Rc6-h6 Bd4-e5
Rh6-c6
11 -> 7:28.13 64426007 0 turns
12 18 49717 71353565 Ne4-g3 Qc2-c3 Qa5xc3 Bb2xc3 Ng3xh1 Nd2-b3
Ra8-c8 Nb3xc5 Rc8xc6 Bc3-d4 Rc6-h6 Bd4-e5
Rf8-e8 Be5-f4
12 -> 25:56.31 204309622 0 turns
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