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Subject: Re: Can your engine find Nd5?

Author: Roy Eassa

Date: 10:50:12 09/08/01

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On September 08, 2001 at 13:44:10, Vincent Diepeveen wrote:

>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

I'd give Diep credit for finding it at ply 13, since it plays Nd5 on the second
move and the main line transposes anyway.







>
>>
>>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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