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Subject: Re: a little deeper

Author: Slater Wold

Date: 20:58:14 07/17/02

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On July 17, 2002 at 21:49:14, Joshua Lee wrote:

>On July 17, 2002 at 18:52:47, Slater Wold wrote:
>
>>W,S - Deep Junior 7
>>1br1r1k1/1b1q1pp1/p1p2n1p/1p2n3/1P6/PNN1P3/2QBBPPP/4RRK1 b - - 0 1
>>
>>Analysis by Deep Junior 7:
>>
>>1...Neg4 2.h3 Nh2
>>  ³  (-0.36)   Depth: 3   00:00:00
>>1...Neg4!
>>  ³  (-0.66)   Depth: 6   00:00:00  3kN
>>1...Neg4!
>>  ³  (-0.66)   Depth: 6   00:00:00  3kN
>>1...Neg4 2.Nc5 Bxh2+ 3.Kh1 Qc7 4.Nxb7 Qxb7 5.f3 Nd5 6.fxg4 Nxe3 7.Bxe3
>>  =  (-0.15)   Depth: 9   00:00:00  150kN
>>1...c5 2.bxc5 Qc6 3.e4 Nc4 4.Bf3 Nxd2 5.Qxd2
>>  ³  (-0.34)   Depth: 9   00:00:00  180kN
>>1...Nc4 2.Bxc4 bxc4
>>  ³  (-0.36)   Depth: 9   00:00:00  266kN
>>1...Nc4 2.Bxc4
>>  =  (-0.06)   Depth: 12   00:00:00  775kN
>>1...c5 2.bxc5 Qc6 3.e4 Nc4 4.Bf3 Qc7 5.g3 Nxa3
>>  ³  (-0.44)   Depth: 12   00:00:00  1177kN
>>1...c5 2.bxc5 Nc4 3.Bc1 Qc6 4.e4 Nxe4 5.Nxe4 Qxe4 6.Qxe4 Bxe4 7.Bh5
>>  µ  (-0.72)   Depth: 15   00:00:04  10707kN
>>1...c5 2.Nxc5 Nf3+ 3.Bxf3 Qd6 4.g3 Bxf3 5.e4 Qe5 6.Nxa6 Nxe4 7.Re3 Red8 8.Nxb8
>>Qxb8 9.Be1 Ng5 10.Re7
>>  ³  (-0.51)   Depth: 18   00:01:17  170263kN
>>1...c5 2.Nxc5 Nf3+ 3.Bxf3 Qd6 4.g3 Bxf3 5.e4 Ng4 6.Nd5 Qe5 7.Bc3 Qh5 8.h4 Be5
>>9.Bxe5
>>  ³  (-0.61)   Depth: 20   00:04:14  539289kN
>>1...c5 2.bxc5 Nc4 3.Bc1 Qc7 4.g3 Ba7 5.a4 Bxc5 6.axb5 axb5 7.Nxb5 Qc6 8.e4 Bxf2+
>>9.Rxf2 Qxb5
>>  µ  (-0.71)   Depth: 21   00:21:03  2726068kN
>>
>>(W,  17.07.2002)
>
>While not 22 Nxc5 RxN! 23 pxR Nf3+ etc. it's clear that The Move order would
>work itself out but how about the position with Black to Play RxN! will DJ7 find
>that? I am very impressed DJ7 might be the next program i get

No.  DJ thinks Rxc5 is a *lot* worse than Nf3+.  That's why the lines don't
match.

So perhaps the correct positon to look at would be Rxc5.  However, with about 30
minutes of looking, I don't see the benefit sac'ing the rook.  Neither did
several engines I tested.



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