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Subject: Re: Can your engine find Nd5?

Author: Vincent Diepeveen

Date: 10:44:10 09/08/01

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On September 07, 2001 at 16:12:50, Aaron Gordon wrote:

>While analyzing a game between Shirov and Polgar I came across this position..
>
>[D]rnb2bk1/1pqnr2p/p2pp1P1/6PB/4P3/2N1B3/PPP4P/R2Q1RK1 w - - 0 1

00:05 0 0 46635 (3514) 6 1.300 g6xh7 Re7xh7 Qd1-f3 Kg8-h8 Bh5-g6 Nb8-c6 Bg6xh7 K
h8xh7
00:09 0 0 277710 (49246) 7 1.537 g6xh7 Re7xh7 Bh5-g6 Rh7-h3 Bg6-f7 Kg8-g7 Bf7xe6
 Rh3xe3 Rf1-f7 Kg7-g6 Qd1-d4
00:14 0 0 720776 (119978) 8 1.658 g6xh7 Re7xh7 Bh5-g6 Rh7-h4 Bg6-f7 Kg8-g7 Qd1-f
3 Bf8-e7 Bf7xe6 Nd7-e5 Qf3-f5 Bc8xe6 Qf5xe6
00:32 0 0 2464184 (902620) 9 1.658 g6xh7 Re7xh7 Bh5-g6 Rh7-h4 Bg6-f7 Kg8-g7 Qd1-
f3 Bf8-e7 Bf7xe6 Nd7-e5 Qf3-f5 Bc8xe6 Qf5xe6
++ d1-f3
01:14 0 0 6549779 (2675079) 9 1.890 Qd1-f3 Qc7-d8 g6xh7 Re7xh7 Bh5-g6 Rh7-g7 Bg6
-f7 Kg8-h8 Bf7xe6 Bf8-e7 Qf3-h5 Rg7-h7 Qh5-g6
01:59 0 0 10910143 (2722070) 10 1.890 Qd1-f3 Qc7-d8 g6xh7 Re7xh7 Bh5-g6 Rh7-g7 B
g6-f7 Kg8-h8 Bf7xe6 Bf8-e7 Qf3-h5 Rg7-h7 Qh5-g6
++ g6-h7
02:17 0 0 12745184 (3151211) 10 2.507 g6xh7 Re7xh7 Bh5-g6 Rh7-h4 Qd1-f3 Qc7-d8 B
g6-f7 Kg8-h8 Qf3-g3 Rh4-h7 g5-g6 Rh7-h4 Bf7xe6
07:06 0 0 41115931 (5009913) 11 2.465 g6xh7 Kg8-h8 g5-g6 Bf8-g7 Kg1-h1 Nb8-c6 Qd
1-e1 Re7-e8 Rf1-g1 Nd7-f6 Bh5-e2 Nc6-e5 Qe1-g3
14:31 0 0 85192680 (7826459) 12 2.465 g6xh7 Kg8-h8 g5-g6 Bf8-g7 Kg1-h1 Nb8-c6 Qd
1-e1 Re7-e8 Rf1-g1 Nd7-f6 Bh5-e2 Nc6-e5 Qe1-g3
59:04 0 0 350910810 (38006451) 13 3.399 g6xh7 Kg8-h8 Nc3-d5 e6xd5 Qd1xd5 Re7xh7
Bh5-g6 Bf8-g7 Bg6xh7 Qc7-d8 Bh7-f5 Nd7-e5 Ra1-d1 Nb8-c6 Qd5xd6 Qd8xd6 Rd1xd6
01:18:54 0 0 469551084 (60480377) 14 3.399 g6xh7 Kg8-h8 Nc3-d5 e6xd5 Qd1xd5 Re7x
h7 Bh5-g6 Bf8-g7 Bg6xh7 Qc7-d8 Bh7-f5 Nd7-e5 Ra1-d1 Nb8-c6 Qd5xd6 Qd8xd6

DIEP dual 1.2Ghz AMD 350mb hash or something.

I'm sure i would have found Nd5 if it was a tactical win. I get 1.7 for it
initially though, of course this also goes up but it's about 0.7 worse
than gxh7 here. In the end the score is even slightly higher than for
gxh7 if i play it, but it's all positional difference so no big deal
i guess.

Nd5 looks nicer though than gxh7

>
>Fritz and most others keep wanting to do gxh7 but the actual move that was
>played was Nd5 and shows a +3 pawn lead after a couple minutes of searching.
>
>Let me know what you guys can come up with...



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