Search found 26 matches

by nnnnnnnn
Fri Sep 04, 2020 1:22 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish 12 has arrived!
Replies: 32
Views: 9321

Re: Stockfish 12 has arrived!

Stockfish 12 still cannot solve the win study 2R2K2/p3p3/3p4/p2P4/P7/4p3/6pp/6nk w - - 0 1 within a couple of minutes (4 cores, Mac, 8GB hash via brew). Even after the introductory moves 1. Rc1 e2, Stockfish 12 did not seem to see the winning move 2 Rb1! after a while. I wish these engines were tune...
by nnnnnnnn
Mon Aug 24, 2020 6:37 pm
Forum: Computer Chess Club: General Topics
Topic: Chess solved?
Replies: 265
Views: 39298

Re: Chess solved?

Consider the initial position.

Remove black's queen.

Is there a proof that black does not have a forced win?
by nnnnnnnn
Sat Aug 22, 2020 10:19 am
Forum: Computer Chess Club: General Topics
Topic: Test position
Replies: 34
Views: 6642

Re: Test position

All I wanted to point out was if a (computer-chess) test- position has more than one solution it's not the same to say it has a dual solution as this means in terms of composed studies. I agree. I should have cited the best contemporary discussion known to me of the difference between minor and maj...
by nnnnnnnn
Tue Aug 18, 2020 10:46 pm
Forum: Computer Chess Club: General Topics
Topic: Test position
Replies: 34
Views: 6642

Re: Test position

"Dual" has an other meaning as for studies as it has for test postions. A dual in a study is a second move of solution no matter of length to mate. Major Dual means dual at first move, Minor Dual at later moves. This is not the commonly understood use of the terms "major dual" or "minor dual" in st...
by nnnnnnnn
Fri Jul 24, 2020 10:14 pm
Forum: Computer Chess Club: General Topics
Topic: This is still pretty rough ... HONEY-NN release
Replies: 12
Views: 2485

Re: This is still pretty rough ... HONEY-NN release

What do you mean by "puzzle"? Study? Direct-mate? And why would a neural net be good at these? I would have thought that nets would be weaker than pure engines when the solution was purely tactical, as is the case for most compositions, particularly when the winning moves are often ipso facto improb...
by nnnnnnnn
Sat Jul 04, 2020 10:23 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Stockfish has included WDL stats in engine output
Replies: 58
Views: 16628

Re: Stockfish has included WDL stats in engine output

wdl may be just what I need which is to determine the win/loss/draw probability... (In fact I asked exactly this question last week, http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74243 , how to determine when to stop search based on a cp 0 score, and nobody mentioned wdl, which would have sol...
by nnnnnnnn
Thu Jul 02, 2020 5:13 pm
Forum: Computer Chess Club: General Topics
Topic: WDL
Replies: 48
Views: 3937

Re: WDL

As many of know, NN engines have been reporting WDL data with Scoring Percentage for some time. A while back, I took their formula to convert to a centipawn and applied it the centipawn evaluation to come u It is worth noting that Stockfish's WDL is a function of both the evaluation and the current...
by nnnnnnnn
Thu Jul 02, 2020 6:56 am
Forum: Computer Chess Club: General Topics
Topic: WDL
Replies: 48
Views: 3937

Re: WDL

I have not looked at the patch - does it account for the difference between score cp 0 in a table base, which should have associated wdl of wdl 0 1000 0 and score cp 0 in a middlegame position, which is entirely different. (What about when the PV of position not in the tablebase results in a tableba...
by nnnnnnnn
Thu Jul 02, 2020 3:48 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Stockfish has included WDL stats in engine output
Replies: 58
Views: 16628

Re: Stockfish has included WDL stats in engine output

wdl may be just what I need which is to determine the win/loss/draw probability. I had been using heuristics based on score. (In fact I asked exactly this question last week, http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74243 , how to determine when to stop search based on a cp 0 score, and n...
by nnnnnnnn
Mon Jun 22, 2020 2:47 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Java vs C. It's not like one would think.
Replies: 13
Views: 4275

Re: Java vs C. It's not like one would think.

I tried Java a long time ago (long before the Oracle takeover), but I found it awkward at the time to write high-performance code because of all the object wrapping of primitive types that was necessary to get abstraction. At the time there were not even typedefs of primitive types. For instance, if...