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Subject: Re: Some more test position with the same team(Nxa1 bad)

Author: Uri Blass

Date: 15:29:39 10/21/00

Go up one level in this thread

On October 21, 2000 at 17:52:39, Chessfun wrote:

>On October 21, 2000 at 16:23:40, Uri Blass wrote:
>
>>1)Avoid Nxd4 from Rebel8-Saitex Sparc
>>
>>[D]r1b2rk1/pp2nppp/2n1p3/q1ppP1B1/3P2QP/P1P5/2P1NPP1/R3KB1R b KQ h3 0 1
>
>Gambit 1.0 Cel 433 48 Mb.
>; 00:00:00.6  1.   Score: 1.74   depth: 7 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Ng3 Ng6 Nh5
>; 00:00:01.7  1.   Score: 1.93   depth: 8 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Nf5 Nf4
>Qa4
>; 00:00:02.5  1.   Score: 1.94   depth: 9 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Nf5 Ng3
>Nxg3 fxg3 Qa4
>; 00:00:06.0  1.   Score: 1.74   depth: 10 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Nf5 Ng3
>Qa4 Nxf5 exf5 Bd3
>; 00:00:14.4  1.   Score: 1.78   depth: 11 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Ng3 d4 Ne4
>Ng6 Qg5 Qa4 cxd4 cxd4
>; 00:00:32.6  1.   Score: 1.80   depth: 12 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Ng3 Ng6 Nh5
>d4 Bd3 dxc3+ Ke2 Qc7 Bxg6 hxg6
>; 00:01:31.3  1.   Score: 1.98   depth: 13 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Nf4 Qa4 Bd3
>Ng6 g3 Nxf4 Qxf4 Qxf4+ gxf4 Bd7
>; 00:03:14.7  1.   Score: 2.00   depth: 14 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Nc6 Nc1
>h6 Qg3 Rd8 Nb3 Qc7 Re1 c4
>; 00:08:44.2  1.   Score: 2.00   depth: 15 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Nc6 Rh3
>Qd8 Qxd8 Rxd8 Re3 f6 exf6 gxf6
>
>; Analysis completed
>
>Tiger 13.0 Cel 433 48 Mb.
>; 00:00:00.7  1.   Score: 1.74   depth: 7 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Nf4 Ng6 Nxg6
>hxg6
>; 00:00:01.9  1.   Score: 1.84   depth: 8 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Nf4 Ng6 Nxg6
>fxg6 Qg3
>; 00:00:02.3  1.   Score: 1.92   depth: 9 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Qc7 Nf4
>Nf5 Re1
>; 00:00:05.8  1.   Score: 1.94   depth: 10 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Qc7 Nf4
>Nf5 Re1 c4
>; 00:00:12.8  1.   Score: 1.88   depth: 11 Nxd4 Kd2 Ndc6 Bxe7 Nxe7 Qg5 Qc7 Nf4
>Nf5 Re1 h6 Qh5
>; 00:01:12.6  1.   Score: 2.00   depth: 12 Nxd4 Kd2 Ndf5 Bxe7 Nxe7 Qg5
>; 00:02:13.9  1.   Score: 1.94   depth: 13 Nxd4 Kd2 Ndf5 Bxe7 Nxe7 Qg5 Qc7 Ng3
>Ng6 Re1 f5 exf6ep gxf6 Qh6 Qf4+ Qxf4 Nxf4
>; 00:05:31.7  1.   Score: 2.02   depth: 14 Nxd4 Kd2 Ndf5 Bxe7 Nxe7 Qg5 Qc7 Ng1
>h6 Qg3 Bd7 Bd3 c4 Be2 Nf5
>
>; Analysis completed


Kd2 is wrong and the right move is Bxe7 and it leads to another test position:

[D]r1b2rk1/pp2nppp/4p3/q1ppP1B1/3n2QP/P1P5/2P1NPP1/R3KB1R w KQ - 0 1

Find Bxe7

>
>
>>2)Avoid Bxc4 from Junior5(p200MMX)-Fritz3(p90)(This one is hard because in order
>>to avoid Bxc4 you need first to find Bxc4)
>>
>>Junior5(p200) was unfortunately good enough to find Bxc4 and lost after
>>dxc3 Qxd8+ Kxd8 Ne5 Be6 Bxe6 fxe6 Nf7+ when the white knight was trapped at h8.
>>
>>[D]rnbqkbnr/pp3ppp/2p5/8/2ppP3/2N2N2/PP3PPP/R1BQKB1R w KQkq - 0 1


I see the tigers  cannot find Bxc4.
This can be result of one of the following reasons:

1)They do not search deep enough to see it
2)They have the right evaluation to tell them not to play it.

My experience with chess programs tells me that in the cases when programs do
not find Bxc4 it is because of reason 1

I checked it by giving them the position after Bxc4 dxc3 Qxd8+ Kxd8 and I found
that they see a clear advantage for white.

Uri

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