Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Rybka, Hokus Pokus, Magic Moves and other stories...........

Author: Christopher Conkie

Date: 07:33:27 01/13/06

Go up one level in this thread


On January 13, 2006 at 10:18:36, Albert Silver wrote:

>On January 13, 2006 at 09:41:41, Christopher Conkie wrote:
>
>>121. Rh8 does win easily. I would not give this a passing glance if it were not
>>for........
>>
>>[d]1k1n4/7R/8/1P1K1B2/8/8/8/4b3 w - - 55 121
>
>I don't have any engine running here, but I saw the previous post say Rh8 Ba5
>Kc5 Kc7 b6+. Sorry, but I guess I am missing why Black can't take the pawn with
>Bxb6+.
>
>                                       Albert


After Rh8 Ba5 Kc5 Kc7, Black can play Rh7+ not b6. Then Kb8 (pretty much forced
or the Knight is gone for nothing). Then b6 with mate coming.

As to the original game I cannot manufacture Kc4 with whatever settings Rybka
uses which I can see as the only explanation for this move.

Christopher

>>
>>Rybka 1.01 Beta 9 32-bit:
>>   3	00:00	         464	0	+6.93	Rd7
>>   4	00:00	       1.400	0	+6.73	Rd7
>>   5	00:00	       6.289	0	+6.14	Rd7 Nb7
>>   6	00:00	      16.690	0	+6.14	Rd7 Nb7 Be4
>>   7	00:00	      30.710	0	+6.14	Rd7 Nb7 Be4 Nc5
>>   8	00:01	      61.216	0	+6.14	Rd7 Nb7 Be4 Nc5 Kxc5
>>   9	00:01	     116.891	0	+6.14	Rd7 Nb7 Rg7 Bc3 Rh7 Nd6
>>  10	00:02	     224.836	0	+6.14	Rd7 Nb7 Rg7 Bc3 Rh7 Nd6 Kxd6
>>  11	00:04	     470.114	0	+6.14	Rd7 Nb7 b6 Bf2 Kc6 Na5+ Kb5 Nb7 Be4
>>  12	00:06	     848.874	0	+6.14	Rd7 Nb7 b6 Bf2 Kc6 Na5+ Kb5 Nb7 Be4 Be3
>>  13	00:10	   1.537.689	0	+6.14	Rd7 Nb7 b6 Bf2 Kc6 Na5+ Kb5 Nb7 Be4 Be3 Rxb7+
>>Kc8
>>  14	00:20	   3.389.966	0	+6.14	Rd7 Bf2 Rxd8+ Kb7 Rd6 Bg3 Rd7+ Kb6 Rg7 Bf2 Bd3
>>Be1 Rg6+ Kb7
>>  15	00:31	   5.429.240	0	+6.14	Rd7 Bf2 Rxd8+ Kb7 Rd6 Bg3 Rd7+ Kb6 Rg7 Bf2 Bd3
>>Be1 Rg6+ Kb7
>>  16	00:50	   8.998.071	0	+6.14	Rd7 Bf2 Rxd8+ Kb7 Rd6 Bg3 Rd7+ Kb6 Rg7 Bf2 Bd3
>>Be1 Rg6+ Kb7
>>  17	01:33	  16.939.810	0	+6.14	Rd7 Ba5 Be4 Bc7 Rh7 Ba5 Rg7 Bc7 Re7 Bb6
>>  18	02:41	  29.711.753	0	+6.14	Rd7 Ba5 Be4 Bc7 Rh7 Ba5 Rg7 Bc7 Re7 Bb6 Bf5 Bf2
>>Rg7 Nb7
>>  19	04:48	  53.325.032	0	+6.14	Rd7 Ba5 Be4 Bc7 Rh7 Ba5 Rg7 Bc7 Re7 Bb6 Bf5 Bf2
>>Rg7 Nb7
>>  20	09:07	  97.866.165	0	+6.14	Rd7 Ba5 Be4 Bc7 Rh7 Ba5 Rg7 Bc7 Re7 Bb6 Bf5 Bf2
>>Rg7 Nb7
>>  21	17:19	 183.258.566	0	+6.14	Rd7 Ba5 Be4 Bc7 Rh7 Ba5 Rg7 Bc7 Re7 Bb6 Bf5 Bf2
>>Rg7 Nb7
>>
>>.......the fact that Rybka 1.01 Beta 9 w32 does not want to play Kc4 at depth 19
>>at all......
>>
>>For my next trick.......
>>
>>;-)
>>
>>Christopher



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.