Author: Christophe Theron
Date: 13:52:21 02/17/02
Go up one level in this thread
On February 17, 2002 at 15:23:02, Marc van Hal wrote:
>On February 17, 2002 at 13:10:50, Christophe Theron wrote:
>
>>On February 17, 2002 at 12:03:18, Uri Blass wrote:
>>
>>>On February 17, 2002 at 11:43:09, Christophe Theron wrote:
>>>
>>>>On February 17, 2002 at 11:34:40, Christophe Theron wrote:
>>>>
>>>>>On February 17, 2002 at 05:43:22, Uri Blass wrote:
>>>>>
>>>>>>On February 17, 2002 at 05:21:47, Ed Schröder wrote:
>>>>>>
>>>>>>>On February 17, 2002 at 04:55:13, Steffen Jakob wrote:
>>>>>>>
>>>>>>>>Here is another position which is easy to solve for humans. In a blitz game
>>>>>>>>between Hossa and Arasan the following position was on the board:
>>>>>>>>
>>>>>>>>[D]8/8/4B2p/2K5/r5P1/p5k1/Rb6/8 b - - 7 116
>>>>>>>>
>>>>>>>>For humans it's rather easy to see that 117... Rxg4 wins without any problems
>>>>>>>>because the white rook is totally paralyzed. Unfortunately Hossa wasn't able to
>>>>>>>>see this in the blitz game. So the game continued until the 50 moves rule forced
>>>>>>>>Hossa to take the bishop and finally to win the game.
>>>>>>>>Which engines find 117... Rxg4 in which time?
>>>>>>>
>>>>>>>Easy for comps too :)
>>>>>>>
>>>>>>>2 secs for RC4
>>>>>>>
>>>>>>>Ed
>>>>>>>
>>>>>>>==============================================================
>>>>>>>
>>>>>>>00:00:02.1 1,88 9 449751 Re4 Kd6 Re3 Bf5 Kf4 Be6 Re5 Bd7
>>>>>>>00:00:02.1 1,88 9 817955 Rxg4
>>>>>>>00:00:02.1 2,09 9 835992 Rxg4 Bxg4 Kxg4 Kd5 h5 Kd6 h4 Kd5
>>>>>>>00:00:03.3 2,17 10 1122788 Rxg4 Bxg4 Kxg4 Kd5 h5 Ke4 h4 Ke3
>>>>>>>00:00:04.5 2,01 11 2027319 Rxg4 Bxg4 Kxg4 Kc4 h5 Kd3 Kf3 Kc4
>>>>>>>00:00:34.6 3,62 12 31107270 Rxg4 Bd7 h5 Bc6 Rf4 Kb5 h4 Ka5
>>>>>>>00:00:44.1 3,82 13 41624594 Rxg4 Bd7 h5 Bc6 Rf4 Bb5
>>>>>>
>>>>>>
>>>>>>Trivial for Deep Fritz
>>>>>>
>>>>>>It knows that opposite color bishops with one pawn advantage gives good chances
>>>>>>for a draw so it's only choice is to sacrifice the rook by evaluation.
>>>>>
>>>>>
>>>>>Where do you see an opposite bishops ending after Rxg4 Bxg4 Kxg4 ?
>>>>>
>>>>>
>>>>>
>>>>> Christophe
>>>>
>>>>
>>>>
>>>>Oops... Sorry.
>>>>
>>>>OK, I've got it now. It's opposite colored bishops BEFORE the above capture
>>>>sequence.
>>>>
>>>>I did not get it at first because Tiger does not consider opposite bishop
>>>>endings as drawish when there are other pieces on the board (like rooks).
>>>>
>>>>Looks like I really should have a second look at this rule... :)
>>>>
>>>>
>>>>
>>>> Christophe
>>>
>>>with rooks on the board there are better chances for a win for the stronger side
>>>but I believe that the chances for a draw are still better than the chances for
>>
>>I guess you mean "win" here ----------^^^^ ?
>>
>>
>>>a draw in case that there are no opposite bishops.
>>
>>
>>Do you think the above still applies if you replace the rooks by queens?
>>
>>
>>
>> Christophe
>
>Christophe your ofcourse right in aswell the methode of the first diagram
> It depended on the place of the blackpawns and the White rook
>aswell as the second diagram your posted
>In a endgame with bishops from the same colour it is not always a draw
>I verry much depend on the position of the kings and the place of the pawns
>or even the pawnstructure
>About endings go take a look at www.Kasparovsf2.com
>A game is played there Somone versus chessmailreaders
>I played precisely that same game Junior7 said for a long time draw draw draw
>till it was to late
>And while saying draw Junior already was reading from the table bases.
OK, thanks for your input Marc.
>
>But ehm Ed asked it Yesterday,
> I do it know how long before Tiger will hit the market?
I will not give this information anymore. In the past unofficial information
about my future plans I have given in public forums has been used against me.
Christophe
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