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Subject: Re: Good Move by Kasparov

Author: Gian-Carlo Pascutto

Date: 07:37:07 03/30/02

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On March 30, 2002 at 10:07:27, Sune Fischer wrote:


>Yes, but the actual line is at least 12 plies then, I mean no wonder I can't
>spot it at 9 plies :)

It seems that you are right. This is Sjeng with material-only eval
and no extensions:

 2    -100     0      251  Bd3 Bxd3 Nxd3
 2    -100     0      410  Bd3 Bxd3 Nxd3
 3    -100     0      717  Bd3 Bxd3 Nxd3
 3    -100     0     1344  Bd3 Bxd3 Nxd3
 4    -100     1     2907  Bd3 Bxd3 Nxd3 Qa6
 4    -100     1     3862  Bd3 Bxd3 Nxd3 Qa6
 5    -100     1     7275  Bd3 Bxd3 Nxd3 Qa6 Rd1
 5    -100     2    11577  Bd3 Bxd3 Nxd3 Qa6 Rd1
 6    -100     4    21016  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8
 6    -100     5    26940  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8
 7    -100     9    49797  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3
 7    -100    13    79936  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3
 8    -100    22   159005  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6
 8    -100    29   195089  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6
 9    -100    72   443442  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2
 9    -100    95   636518  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2
10    -100   157  1146916  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2 Qd6
10    -100   219  1438712  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2 Qd6
11    -100   525  3316117  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2 Qd6 Ra1
11    -100   707  5011381  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2 Qd6 Ra1
12    -100  1098  7870990  Bd3 Bxd3 Nxd3 Qa6 Rd1 Kh8 Be3 Nf6 Qd2 Qd6 Ra1 Qa6
12     -50  1748 12264959  Bxg6 !!
12    -100  3146 20329131  Bxg6 hxg6 Qb1 Ng7 Bxg7 Bxf1 Qxg6 Bd3 Nxd3 Qa6 Rd1 Qd6
12    -100  3527 22171059  Bxg6 <hxg6> <Qb1> <Ng7> <Bxg7> <Bxf1> <Qxg6> <Bd3>
12    -100  3535 22209169  Bxg6 <hxg6> <Qb1> <Ng7> <Bxg7> <Bxf1> <Qxg6> <Bd3>
13     -50  4369 27086928  Bxg6 !!
13    -100  4579 28859384  Bxg6 hxg6 Qb1 Ng7 Bxg7 <Bxf1> <Qxg6> <Bd3> <Nxd3>
<Qa6> <Rd1> <Qd6>
13    -100  5579 37182984  Bxg6 <hxg6> <Qb1> <Ng7> <Bxg7> <Bxf1> <Qxg6> <Bd3>
13    -100  5579 37183015  Bxg6 <hxg6> <Qb1> <Ng7> <Bxg7> <Bxf1> <Qxg6> <Bd3>

As you can see, this combination is pretty bad for my program as
the lack of eval will cause it to prune way too much.

--
GCP



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