Author: Uri Blass
Date: 17:00:53 01/26/03
Go up one level in this thread
On January 26, 2003 at 19:26:26, bobby palacios wrote:
>On January 26, 2003 at 19:19:01, Dieter Buerssner wrote:
>
>>When I read this, Yace eval is rather depressing. Over one hour needed to find
>>Rd2 on P4. 2.53 GHz.
>>
>> 318256147 8:48.0 0.06 19t 37...Ba3 38. Re1 Ke6 39. Kh3 a4 40. Rb1 Rd4 41.
>> Kg2 Bc5 42. Rc1 a3 {HT} {10}
>> 472596728 13:03.1 0.07 19t+ 37...fxg3 38. Kxg3 Rd2 39. Nxd2 exd2 40. Rd1
>> Be3 41. Kh3 Kd4 42. a4 Kc3 43. Kg2
>> 808997753 22:25.0 0.44 19t 37...fxg3 38. Re1 Rd2 39. Nxd2 exd2 40. Rd1
>> Be3H 41. a4H {HT}
>> 839299982 23:16.2 0.44 19. 37...fxg3 38. Re1 Rd2 39. Nxd2 exd2 40. Rd1 Be3
>> 41. a4
>>1554231297 42:51.7 0.84 20++ 37...fxg3 38. Re1 Rd2 39. Nxd2 exd2 40. Rd1 Be3
>> 41. a4
>>2888568380 1:19:49 0.85 20t 37...fxg3 38. Rc3 Kf4 39. Nxg3 Rd2H 40. Ne4H
>> Rxe2+H 41. Kf1H Kxf3H 42. Nxc5H Rd2H 43. Rc1H
>> g4H 44. Kg1H Rg2+H 45. Kh1H Rxa2H 46. Nd3H Rd2H
>> {HT} {-100}
>>3051178477 1:24:15 0.86 20t+ 37...Rd2 38. Nxd2 exd2 39. Rd1 Be3 40. gxf4+
>> gxf4 41. a4 Kd4 42. Kh3 Kc3 43. Kg2
>>3289700218 1:30:46 1.84 20++ 37...Rd2 38. Nxd2 exd2 39. Rd1 Be3 40. gxf4+
>> gxf4 41. a4 Kd4 42. Kh3 Kc3 43. Kg2
>>3291273511 1:30:48 1.84 20t 37...Rd2 38. Nxd2 exd2 39. Rd1H Be3H {HT}
>>3295184210 1:30:55 1.84 20. 37...Rd2 38. Nxd2 exd2 39. Rd1 Be3
>>3662020845 1:40:50 2.24 21++ 37...Rd2 38. Nxd2 exd2 39. Rd1 Be3 40. gxf4+
>> gxf4 41. a3 Kd4 42. Kh3 Kc3 43. c5
>>
>>Regards,
>>Dieter
>
>
>This is rather surprising, I thought Rd2 was a fairly easy move to find. Until
>I saw many top commercial engines having trouble with it, except for Chess Tiger
>14. What is the reason for this?
Null move pruning+lack of knowledge to see the threats.
Uri
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