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Subject: Re: The mistake of nullmover in the last game

Author: Ralf Schäfer

Date: 09:10:19 02/02/04

Go up one level in this thread


On February 02, 2004 at 00:00:51, Michel Langeveld wrote:

>On February 01, 2004 at 19:04:31, Ralf Schäfer wrote:
>
>>On February 01, 2004 at 17:59:09, Michel Langeveld wrote:
>>
>>>Nullmover took Rxe3 and could not get futher then draw after this move.
>>>How long for you engines to see it?
>>
>>Hi Michel,
>>
>>Cheetah needed 3 seconds to see the draw after Rxe3, then about 30 seconds to
>>get another good move :-)
>>
>>Cheetah 0.70 CCT6 Build 4  WB2 1 MB:
>> 1   00:00 -0,53   Te5xe3
>> 1   00:00 -0,07   g7g5
>> 1   00:00  0,97   Te5d5
>> 1   00:00  1,01   c6c5
>> 1   00:00  1,05   Te5c5
>> 2   00:00 -3,89   Te5c5 Tc3xc5
>> 2   00:00 -0,53   Te5xe3 Te1xe3
>> 2   00:00 -0,07   g7g5 h5xg6/ep
>> 2   00:00  0,18   Te5d5 Tc3xc6
>> 2   00:00  0,20   Ld3e2 Le3xa7
>> 2   00:00  1,12   Ld3c2 Tc3xc6
>> 2   00:00  1,25   Da2d5 Kg1g2
>> 3   00:00  0,97   Da2d5 Kg1h1 c6c5
>> 3   00:01  3,03   Te5xe3 Df4xe3 Te8xe3
>> 4   00:01  3,03   Te5xe3 Df4xe3 Te8xe3 Te1xe3
>> 5   00:01  3,58   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Tc3xc6
>> 6   00:01  3,58   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Tc3xc6 Da1b2+ Kh2h3
>> 7   00:01  4,47   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2h3 Db2xc3
>> 8   00:02  3,62   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2h3 Db2xc3
>>De3xa7
>> 9   00:02  3,62   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2g1 Db2xc3
>>De3xa7 Dc3e1+ Kg1h2
>>10   00:03  0,00   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2g1 Db2xc3
>>De3e8+ Kg8h7 De8g6+ Kh7g8 Dg6e8+ Kg8h7 De8g6+ Kh7g8 Dg6e8+ Kg8h7 De8g6+
>>10   00:25  1,29   Da2d5 Tc3c1 Ld3c2 Tc1xc2 Te5xe3 Te1f1 Te3a3 Tc2d2 Dd5f7 Df4h4
>>10   00:30  2,12   g7g5 h5xg6/ep Te5xe3 Te1xe3 Da2a1+ Kg1h2 Da1b2+ Kh2g1 Te8xe3
>>Df4xe3 Db2xc3 De3xa7
>>
>>regards
>>Ralf
>`
>I saw that g7g5 is a draw too :)
>How long does it take to also avoid this one?
>
>Probably the bestmove is Qd5
>
>[D]4r1k1/p5p1/2p4p/4rp1P/P4Q2/2RbBPP1/q7/4R1K1 b - - bm Qd5
>
>Michel

Hi Michel (and Anthony one posting down there)

Of course you are both right, this move is draw too.
Sorry for that, after CCT I was _too_ tired to let Cheetah go deep into that
problem :-) Here is the result from a longer search - Qd5 seems to be the best
with a score + 1.30, needed time ~ 2 minutes

Cheetah 0.70 CCT6 Build 4  WB2 1 MB:

 8   00:02  3,62   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2h3
 9   00:02  3,62   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2g1
10   00:03  0,00   Te5xe3 Te1xe3 Da2a1+ Kg1h2 Te8xe3 Df4xe3 Da1b2+ Kh2g1 Db2xc3
De3e8+ Kg8h7 De8g6+ Kh7g8 Dg6e8+ Kg8h7 De8g6+ Kh7g8 Dg6e8+ Kg8h7 De8g6+
10   00:24  1,29   Da2d5 Tc3c1 Ld3c2 Tc1xc2 Te5xe3 Te1f1 Te3a3 Tc2d2 Dd5f7 Df4h4
10   00:29  2,12   g7g5 h5xg6/ep Te5xe3 Te1xe3 Da2a1+ Kg1h2 Da1b2+ Kh2g1 Te8xe3
Df4xe3 Db2xc3 De3xa7
11   00:31  0,00   g7g5 h5xg6/ep Te5xe3 Te1xe3 Da2a1+ Kg1h2 Da1b2+ Kh2g1 Db2b1+
Kg1h2
11   02:08  1,28   Da2d5 Kg1f2 c6c5 Tc3a3 Te5e7 a4a5 Te7b7 Te1d1 c5c4 Ta3a2
Dd5d8
12   03:32  1,30   Da2d5 Tc3c1 c6c5 Le3f2 Te5xe1+ Lf2xe1 c5c4 Le1f2 a7a5 Lf2e3
Dd5d8 Df4d4 Kg8h7
13   05:11  1,33   Da2d5 Tc3c1 Kg8h7 Le3f2 Te5xe1+ Tc1xe1 Te8xe1+ Lf2xe1 Ld3c2
Kg1g2 Dd5a2 a4a5 Lc2d3+ Kg2g1 Da2e2 Le1b4 De2d1+ Kg1h2 Dd1c2+ Kh2h3
13   06:10  1,33   Da2d5 Tc3c1 Kg8h7 Le3f2 Te5xe1+ Tc1xe1 Te8xe1+ Lf2xe1 Ld3c2
Kg1g2 Dd5a2 a4a5 Lc2d3+ Kg2g1 Da2e2 Le1b4 De2d1+
Cheetah WB


Best
Ralf



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