SF mates Leela in 25 moves at CCC

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Jouni
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SF mates Leela in 25 moves at CCC

Post by Jouni » Fri Mar 15, 2019 12:41 pm



11. -c5 is losing move?

BTW SF speed in CCC 6 is stunning: 200 meganodes/s in endings with 7 piece syzygy :o . How is it possible with 2 TB SDD!?
Jouni

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xr_a_y
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Re: SF mates Leela in 25 moves at CCC

Post by xr_a_y » Fri Mar 15, 2019 1:21 pm

How many book moves were used ?

pferd
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Re: SF mates Leela in 25 moves at CCC

Post by pferd » Fri Mar 15, 2019 1:47 pm

I have seen a couple of those quick losses in my private matches, too. Leela runs with standard settings + 5-men syzygy. Stockfish uses 4threads +2048mb Hash.

I picked up Leela's worst loss:


jdart
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Re: SF mates Leela in 25 moves at CCC

Post by jdart » Fri Mar 15, 2019 2:21 pm

I think 5. .. Nd7 is just bad, and this may be an example of CCC choosing an unbalanced opening. The game stats from Chessbase actually don't look too horrible, but with best play White is better. The game follows known theory at least through 13. b4. Black had a few chances to deviate: for example 8. .. N7f6 was possible, but the alternatives look bad, too.

--Jon

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Eduard
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Re: SF mates Leela in 25 moves at CCC

Post by Eduard » Fri Mar 15, 2019 3:03 pm

Nice game, thanks! :P

In 3 variants mode, Stockfish does not want to play 5 ... Nd7. It must be a Leela move. I do not think it was a book move. Leela is not good tactically, then something like that can happen. 8-)

Btw, I like such sacrifices on f7!
Last edited by Eduard on Fri Mar 15, 2019 3:08 pm, edited 1 time in total.

Jesse Gersenson
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Re: SF mates Leela in 25 moves at CCC

Post by Jesse Gersenson » Fri Mar 15, 2019 3:08 pm

It is not exactly a 2 TB ssd. Rather, it is 10x 2TB drives arranged in "raid 10".

jp
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Re: SF mates Leela in 25 moves at CCC

Post by jp » Fri Mar 15, 2019 3:11 pm

xr_a_y wrote:
Fri Mar 15, 2019 1:21 pm
How many book moves were used ?
Three. 4.Nf3 on are their own moves.
Last edited by jp on Fri Mar 15, 2019 3:12 pm, edited 1 time in total.


jp
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Re: SF mates Leela in 25 moves at CCC

Post by jp » Fri Mar 15, 2019 3:16 pm

jdart wrote:
Fri Mar 15, 2019 2:21 pm
I think 5. .. Nd7 is just bad, and this may be an example of CCC choosing an unbalanced opening. The game stats from Chessbase actually don't look too horrible, but with best play White is better. The game follows known theory at least through 13. b4. Black had a few chances to deviate: for example 8. .. N7f6 was possible, but the alternatives look bad, too.
--Jon
Move 4 on are their own moves. In the reverse game, Lc chose 4. c5. The game ended 1/2-1/2.

supersharp77
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Re: SF mates Leela in 25 moves at CCC

Post by supersharp77 » Fri Mar 15, 2019 6:47 pm

Jouni wrote:
Fri Mar 15, 2019 12:41 pm


11. -c5 is losing move?

BTW SF speed in CCC 6 is stunning: 200 meganodes/s in endings with 7 piece syzygy :o . How is it possible with 2 TB SDD!?
Move #17 by White....Rb7 !! A masterstroke! Thats why we love Chess!! AR :D :wink:

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