Endgame test

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Jack Lad
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Endgame test

Post by Jack Lad » Tue Feb 05, 2008 4:50 pm

[d] 1k6/8/6NP/5K2/4pR2/3P4/8/7q w - - 0 1
Does your engine prefer to play Rh4? here instead of dxe4! which wins? :roll:

PauloSoare
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Re: Endgame test

Post by PauloSoare » Thu Feb 07, 2008 8:56 am

Jack Lad wrote:[d] 1k6/8/6NP/5K2/4pR2/3P4/8/7q w - - 0 1
Does your engine prefer to play Rh4? here instead of dxe4! which wins? :roll:
Very difficult position, Mc.
The only thing that seems rigth is that
dxe4 it´s a win for white, because after 1. dxe4 Qxh6 2. e5 mates
in 144(!) moves, acording Shredder endgame databases on line, but
engines don´t like to lost the pawn on h6.

I think that 1. Rh4 may be a drawn, but I am not 100% sure.

What a GM choose to play in this position? If they played 1. dxe4
can they win the game?

Paulo Soares

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smirobth
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Re: Endgame test

Post by smirobth » Thu Feb 07, 2008 10:06 am

Jack Lad wrote:Does your engine prefer to play Rh4? here instead of dxe4! which wins?
Are you sure dxe4 wins? Nalimov tablebases say yes, but they don't take the 50 move rule into consideration.
- Robin Smith

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Jack Lad
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Re: Endgame test

Post by Jack Lad » Thu Feb 07, 2008 1:12 pm

smirobth wrote:Are you sure dxe4 wins? Nalimov tablebases say yes, but they don't take the 50 move rule into consideration.
I never bothered to check that since there is a pawn on the board. :oops:

Infact dxe4 could well be drawn with the 50 move rule.

Terry McCracken
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Re: Endgame test

Post by Terry McCracken » Thu Feb 07, 2008 1:57 pm

smirobth wrote:
Jack Lad wrote:Does your engine prefer to play Rh4? here instead of dxe4! which wins?
Are you sure dxe4 wins? Nalimov tablebases say yes, but they don't take the 50 move rule into consideration.
Time to amend that rule...again...sigh.

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Jack Lad
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Re: Endgame test

Post by Jack Lad » Thu Feb 07, 2008 7:19 pm

PauloSoare wrote:Very difficult position, Mc.
The only thing that seems rigth is that
dxe4 it´s a win for white, because after 1. dxe4 Qxh6 2. e5 mates
in 144(!) moves, acording Shredder endgame databases on line, but
engines don´t like to lost the pawn on h6.

I think that 1. Rh4 may be a drawn, but I am not 100% sure.

What a GM choose to play in this position? If they played 1. dxe4
can they win the game?

Paulo Soares
It is actually 114 moves but the pawn gets stuck on e6 for about 67 of those :oops: so it is probably a draw by the 50 move rule afterall anyway. :roll: :(

PauloSoare
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Re: Endgame test

Post by PauloSoare » Thu Feb 07, 2008 8:11 pm

Well, I forgot the 50 moves rules yet :oops:

Paulo Soares

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smirobth
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Re: Endgame test

Post by smirobth » Thu Feb 07, 2008 10:30 pm

Terry McCracken wrote:
smirobth wrote:
Jack Lad wrote:Does your engine prefer to play Rh4? here instead of dxe4! which wins?
Are you sure dxe4 wins? Nalimov tablebases say yes, but they don't take the 50 move rule into consideration.
Time to amend that rule...again...sigh.
I think it would make more sense to design tablebases that follow all the rules of the game rather than to modify the rules of the game to accommodate computers.
- Robin Smith

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Ovyron
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Re: Endgame test

Post by Ovyron » Fri Feb 08, 2008 12:03 am

smirobth wrote:I think it would make more sense to design tablebases that follow all the rules of the game rather than to modify the rules of the game to accommodate computers.
But what's the reason of the 50 move rule? Because they thought that 50 moves without pawn move or capture should mean no more progress and a draw. But they were wrong.

Of course, setting it longer is useless for humans, so I just say that we should have different rules for computers. If they say it's mate in 360 moves, let them play them.
Make someone happy today.

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Jack Lad
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Re: Endgame test

Post by Jack Lad » Fri Feb 08, 2008 12:50 am

Ovyron wrote:Of course, setting it longer is useless for humans, so I just say that we should have different rules for computers. If they say it's mate in 360 moves, let them play them.
Perhaps it should be changed to 70 moves instead inorder for me to save some face over this position. :wink:

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