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Subject: wrong mainline

Author: Vincent Diepeveen

Date: 17:12:05 09/15/01

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On September 15, 2001 at 18:37:06, Slater Wold wrote:

>On September 15, 2001 at 17:12:37, Vincent Diepeveen wrote:

[D]8/p4bpk/7p/3rq3/3Npp2/PPQ3P1/3R1PKP/8 w - - 3 32

f3?

[snip]
>Let's try something with SE.  :)
>
>Nimzo 8 - W,S
>8/p4bpk/7p/3rq3/3Npp2/PPQ3P1/3R1PKP/8 w - - 0 1
>
>Analysis by Nimzo 8:
[snip]
>1.gxf4
>  ยต  (-0.81)   Depth: 9/23   00:00:04  4125kN
>1.gxf4
>  -+  (-1.41)   Depth: 9/23   00:00:05  5255kN
>1.gxf4 Qxf4 2.Qe3 Rg5+ 3.Kh1 Qg4 4.f3 exf3 5.Qf2 Bd5 6.b4
>  -+  (-1.57)   Depth: 9/23   00:00:07  7518kN
>1.gxf4 Qxf4 2.Qe3 Rg5+ 3.Kf1 Qxh2 4.Qxe4+ Bg6 5.Qe3 Rg1+ 6.Ke2
>  -+  (-1.84)   Depth: 10/25   00:00:20  22223kN
>1.gxf4
>  -+  (-2.29)   Depth: 11/26   00:00:46  53952kN
>1.gxf4 Qxf4 2.Kh1 Rg5 3.f3 exf3 4.Rf2 Bd5 5.Qc2+ g6 6.Qc3
>  -+  (-2.62)   Depth: 11/26   00:00:54  62970kN
>1.f3
>  -+  (-2.61)   Depth: 11/26   00:02:05  148328kN
>1.f3 e3 2.Rd3 fxg3 3.Ne2 gxh2 4.Qxe5 Rxe5 5.Kxh2 Kg6 6.f4
>  -+  (-2.26)   Depth: 11/26   00:02:15  161057kN
>1.f3 e3 2.Rd3 fxg3 3.Ne2 gxh2 4.Qxe5 Rxe5 5.Kxh2 Be6 6.Kg3
>  -+  (-2.24)   Depth: 12/28   00:02:36  186147kN

>(W,  15.08.2001)
>TA-DA!

note that after f3 the move Bh5 wins tactical bigtime. Nimzo amazingly
hasn't smelt it yet here. e3 is leading to the endgame from which
i think DB misevaluated it bigtime. So does nimzo of course, but
not so weird is that a preprocessor misses after f3 that Bh5 wins
bigtime, hmm perhaps it is dissappointing, because IMHO it's a simple
tactical win!

What might matter is that you perhaps had turned on 'futility' forward
pruning last 2 plies?

Perhaps checkout next time the tactical line it outputs first before
saying TADA :)

>Who says SE is a bad thing?  :)

I'm pretty sure that DIEP has more SE than nimzo ever will, but the
'piece threat' extensions are picking up for nimzo huge amount of tactics
usual!

Anyway, it's not about 'who has more extensions' here. it's about the fact
that f3 is a major blunder!

>Slate



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