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by Uri Blass
Mon Sep 16, 2019 1:27 pm
Forum: Computer Chess Club: General Topics
Topic: What kind of game is chess?
Replies: 12
Views: 433

Re: What kind of game is chess?

when it is behind it should learn to try to force tactically complex positions based on the same logic. behind is not only when you already expect to lose and behind can be also when the expected result is 30% or 40%. There are positions when the stronger side cannot keep the advantage and also avoi...
by Uri Blass
Mon Sep 16, 2019 12:03 pm
Forum: Computer Chess Club: General Topics
Topic: What kind of game is chess?
Replies: 12
Views: 433

Re: What kind of game is chess?

LC0 is weak at tactics. But it knows that, and has learned it should better avoid tactically complex positions. Conventional engines are good at tactics. But they are not aware of that. Their evaluation is just as happy in tactically quiet positions as in tactically complex ones. They never learned...
by Uri Blass
Mon Sep 16, 2019 11:34 am
Forum: Computer Chess Club: General Topics
Topic: Draws are getting cheaper, are 15W enough?
Replies: 15
Views: 648

Re: Draws are getting cheaper, are 15W enough?

I could find the following tournament that had 100% draws except one losing player but it is not good enough because this tournament has also less than 100 games. https://www.iccf.com/event?id=66679 I do not see so far one world championship in correspondence chess with at least 99% draws The follow...
by Uri Blass
Mon Sep 16, 2019 11:16 am
Forum: Computer Chess Club: General Topics
Topic: Draws are getting cheaper, are 15W enough?
Replies: 15
Views: 648

Re: Draws are getting cheaper, are 15W enough?

The draw rate keeps rising, and it's been years since anybody at the top even lost a game. When I started playing Freestyle,12 years ago, this was the picture: https://i.postimg.cc/pLFRNtR9/Screen-Shot-09-16-19-at-10-47-AM.png Nothing radically different, from what we can see in correspondence ches...
by Uri Blass
Sat Sep 14, 2019 7:19 am
Forum: Computer Chess Club: General Topics
Topic: The Busted Dutch
Replies: 80
Views: 2156

Re: The Busted Dutch

latest stockfish with default parameters does not see d5 as one of the top 20 moves at depth 30,31: Here are the evaluations 1)c4 0.90/30 0.79/31 0.85/32 2)b3 0.89/30 0.78/31 0.84/32 3)Bg5 0.86/30 0.99/31 0.84/32 4)g3 0.84/30 0.85/31 0.74/32 5)e3 0.8/30 0.65/31 0.74/32 6)Nf3 0.76/30 0.87/31 0.81/32 ...
by Uri Blass
Sat Sep 14, 2019 2:46 am
Forum: Chess Players Forum
Topic: something is clearly wrong in the list of chess players
Replies: 2
Views: 378

something is clearly wrong in the list of chess players

https://chess-db.com/public/execute.jsp?age=99&countries=ISR&sex=a&start=0 I look for the list of chess players in israel and I see some players twice For example I have the following lines 1 2805677 Gelfand, Boris GM 2686 1968 154 2521 9010059402 Gelfand, Boris 0 2733 1968 i SK Schwaebisch Hall 2 I...
by Uri Blass
Sat Sep 14, 2019 1:52 am
Forum: Computer Chess Club: General Topics
Topic: The Busted Dutch
Replies: 80
Views: 2156

Re: The Busted Dutch

Heh, a 0.00 score. I actually went and tried my mainline against ChessDB and I was quite impressed about the wide coverage it already had of it. It also showed a 0.00 score. Eventually we were at a "this position doesn't exist, click here to request analysis" thing, an after 5 seconds it was still ...
by Uri Blass
Fri Sep 13, 2019 8:40 am
Forum: Computer Chess Club: General Topics
Topic: The Busted Dutch
Replies: 80
Views: 2156

Re: The Busted Dutch

I posted 5-6 answers/posts. they were regularly submitted, and now they have disappeared! They're on page 2 of the thread! When you go back to page 1, they "disappear", as they're hidden from view because there's a maximum of what the forum can show per page! Once you go to page 2, they appear, and...
by Uri Blass
Thu Sep 12, 2019 3:30 pm
Forum: Computer Chess Club: General Topics
Topic: generating mate trees
Replies: 9
Views: 387

Re: generating mate trees

I'm not following what you suggesting , but the tree is much bigger with Qxh7. I think Uri is taking the view from the player giving the mate, so the tree is the tree of possible defensive moves. To prove it really is a forced mate, you don't need to look at other moves that are possible for the ma...
by Uri Blass
Wed Sep 11, 2019 3:24 pm
Forum: Computer Chess Club: General Topics
Topic: generating mate trees
Replies: 9
Views: 387

generating mate trees

I think that it may be interesting to have chess softwares that get a position with a forced mate and find the smallest tree to prove the mate. Note that the mate does not have to be the shortest mate and mate in 3 with a forced line that means only 5 plies is better than mate in 2 when black has ma...