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Subject: Re: Positional move for the amateurs

Author: Scott Gasch

Date: 11:37:17 07/30/04

Go up one level in this thread


On July 30, 2004 at 13:08:37, Kurt Utzinger wrote:

>On July 30, 2004 at 12:25:18, Scott Gasch wrote:
>
>>On July 30, 2004 at 10:55:07, Albert Silver wrote:
>>
>>>2q2rk1/p1rn1ppp/1p2pn2/8/Q2P4/2P2N2/P2B1PPP/2RR2K1 b - - 0 17
>>>
>>>17...Rc4! 18.Qxa7 Qc6 19.Qa3 Rc8
>>>
>>
>>monsoon on a 1ghz UP needs 67 sec / depth 11:
>>
>> 1.  -0.26    0.00     40               h6
>> 2.  -0.63    0.00     194              h6 c4
>> 3.  -0.35    0.01     807              h6 Bf4 Rxc3 Qxa7
>> 4.  -0.64    0.03     3174             h6 c4 Re8 Bf4
>> 5.  -0.58    0.10     14301            h6 c4 Nb8 Bf4 Re7
>> 6.  -0.69    0.55     72853            Re8 c4 e5 Qc2 g6 d5
>> 7.  -0.55    1.42     211827           Re8 c4 e5 Re1 e4 Nh4 h6
>> 8.  -0.64    5.59     820286           Ne4 c4 Nd6 Bf4 Rxc4 Rxc4 Nxc4 Qxa7
>> 9.  -0.43   10.50     1666988          Ne4 c4 Nxd2 Rxd2 a6 Qb3 b5 Rdc2 Qb7 cxb5
>>Rxc2 Qxc2 axb5
>>10.  -0.58   23.48     3747302          Ne4 c4 Nxd2 Rxd2 a6 Qc2 Re8 Rdd1
>>11.  -0.49   67.59     11176294         Rc4 Qxa7 Qc6 Qa3 Ra8 Qb3 h6 Qb1 Nd5 Qc2
>>b5
>>12.  -0.57   309.86     48817174         Rc4 Qxa7 Qc6 Qa3 Ra8 Qb2 h6 Rb1 Ra4 Ra1
>>b5
>
>
>     Oops, it's now the second time that I see your
>     program monsoon to come with a move that most
>     or none other engines can find. And last time
>     I asked you to let me know something about
>     monsoon. Have I missed your answer?
>     Kurt [www.utzingerk.com]

Well what can I say, the engine has its moments.  Of course its also very slow
and doesn't get some positions that it seems like other engines all get.  I
stopped working on it a couple of years ago (after cct5) and just recently
started again.  I've implemented a parallel search and slowed down the engine
even more by generating attack tables.  Right now I do not do any pruning except
nullmove and alpha-based futility pruning in the qsearch.  I do checks in the
qsearch.  I am still looking for bugs in the rewrite (and finding them).  Once I
get a little more confident in the new code I will start with some pruning ideas
I have and maybe try to speed things up a little.

http://wannabe.guru.org/scott/hobbies/chess/

Scott



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