Misevaluation.

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Henk
Posts: 5544
Joined: Mon May 27, 2013 8:31 am

Misevaluation.

Post by Henk » Wed Mar 13, 2019 4:28 pm

I saw this funny position on my chess club recently. Played in a real game.

Looks like Stockfish can't see it is a draw.

[d] 8/5k2/3p2p1/2pPp1Pp/1pP1P2P/1P1K4/4B3/8 w - - 0 1

peter
Posts: 1713
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Misevaluation.

Post by peter » Wed Mar 13, 2019 4:59 pm

Hi Henk!
Henk wrote:
Wed Mar 13, 2019 4:28 pm
I saw this funny position on my chess club recently. Played in a real game.

Looks like Stockfish can't see it is a draw.

[d] 8/5k2/3p2p1/2pPp1Pp/1pP1P2P/1P1K4/4B3/8 w - - 0 1
It can after some Forward- Backward:

8/5k2/3p2p1/2pPp1Pp/1pP1P2P/1P1K4/4B3/8 w - - 0 1

Analysis by Cfish 110319 64 POP N:

1.Bd1 Ke7 2.Ke3 Kf7 3.Bxh5 gxh5 4.g6+ Kxg6 5.Kf3 Kf6 6.Kg2 Kf7 7.Kh1 Kg7 8.Kh2 Kf6 9.Kh3 Kg6 10.Kg3 Kg7 11.Kg2
= (0.00) Depth: 97/21 00:01:14 2621MN

Can Leela? (My GPU is too weak.)
Peter.

Werewolf
Posts: 1174
Joined: Thu Sep 18, 2008 8:24 pm

Re: Misevaluation.

Post by Werewolf » Wed Mar 13, 2019 5:01 pm

For some reason my Stockfish Dev crashed when it got to 98 plies deep - showing +4.34

Lc0 does better showing +0.8

peter
Posts: 1713
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Misevaluation.

Post by peter » Wed Mar 13, 2019 5:23 pm

Werewolf wrote:
Wed Mar 13, 2019 5:01 pm
For some reason my Stockfish Dev crashed when it got to 98 plies deep - showing +4.34

Lc0 does better showing +0.8
Thanks for trying.
Can you get Leela to 0.00 like you can easily with SF by a little hash- learning?
Peter.

Henk
Posts: 5544
Joined: Mon May 27, 2013 8:31 am

Re: Misevaluation.

Post by Henk » Thu Mar 14, 2019 8:31 am

Werewolf wrote:
Wed Mar 13, 2019 5:01 pm
For some reason my Stockfish Dev crashed when it got to 98 plies deep - showing +4.34

Lc0 does better showing +0.8
Does that mean 80% winning chances or 80 centipawn ?

Werewolf
Posts: 1174
Joined: Thu Sep 18, 2008 8:24 pm

Re: Misevaluation.

Post by Werewolf » Thu Mar 14, 2019 9:20 am

Henk wrote:
Thu Mar 14, 2019 8:31 am
Werewolf wrote:
Wed Mar 13, 2019 5:01 pm
For some reason my Stockfish Dev crashed when it got to 98 plies deep - showing +4.34

Lc0 does better showing +0.8
Does that mean 80% winning chances or 80 centipawn ?
centipawn

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