Search found 3896 matches

by syzygy
Sat Nov 17, 2018 8:34 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

(note I'm not saying it is the best or the only definition of "fairness" - the term is a bit hard to define) I'd say fairness here means equal treatment. If an engine crashes on purpose when playing specific opponents, then that would clearly be unfair. Not discarding the games of a randomly crashi...
by syzygy
Sat Nov 17, 2018 8:08 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

However, on the other hand, points won fair-and-square contribute to fairness. How do they contribute to fairness if some of the other engines get the point for free? You cannot separate the two. I simply don't see how a point inherently contributes to fairness just by having been won fair and squa...
by syzygy
Sat Nov 17, 2018 7:49 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

I think another problem with a randomly crashing engine is that its performance relative to other engines contradicts the otherwise reasonable assumption that Elo differences are additive. So it's not just draw ratio that is the problem. (So even if draws were impossible, as in tennis, it would be h...
by syzygy
Sat Nov 17, 2018 7:39 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

The inclusion of games of a randomly crashing engine clearly hurts fairness. How can one hurt fairness by including non-crashing games of a crashing engine? I now agree that strictly speaking it does not hurt fairness. But it does hurt the tournament because it distorts the results. See my previous...
by syzygy
Sat Nov 17, 2018 7:32 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

The inclusion of games of a randomly crashing engine clearly hurts fairness. How can one hurt fairness by including non-crashing games of a crashing engine? I now agree that strictly speaking it does not hurt fairness. But it does hurt the tournament because it distorts the results. See my previous...
by syzygy
Sat Nov 17, 2018 7:11 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

If "fairness" of a certain ruleset means "maximizing the prior probability that a stronger engine gets promoted over the weaker one", then removing valid game outcomes will inevitably work against fairness. Using your example, removing 24 actual or potential "valid" outcomes as well as 6 "tainted" ...
by syzygy
Sat Nov 17, 2018 6:58 pm
Forum: Computer Chess Club: General Topics
Topic: what happened to scorpio NN in TCEC?
Replies: 22
Views: 635

Re: what happened to scorpio NN in TCEC?

Confusion aside, the very idea of removing the engine with three crashes from competition and discarding all of its games - supposedly in the interest of fairness - is absolutely misguided, because crashes are essentially random events, just as normal wins, losses and draws are, and discarding vali...
by syzygy
Mon Nov 12, 2018 9:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is there a tool to ask the computer how it can understand code?
Replies: 11
Views: 798

Re: Is there a tool to ask the computer how it can understand code?

I take the following line in stockfish's code that is the first line in main.cpp line 37 std::cout << engine_info() << std::endl; Do you want to find where the implementation of "engine_info()" can be found, or do you want to figure out what std::cout is doing? For std::cout, just look here: https:...
by syzygy
Wed Sep 12, 2018 10:52 pm
Forum: Computer Chess Club: General Topics
Topic: Interesting and first(?) 7 piece TB test running
Replies: 5
Views: 610

Re: Interesting and first(?) 7 piece TB test running

Since the tb files are not distance to mate, there can be lots of probes in a search. The TB files are not distance to mate, and there can be lots of probes in a search. But the first part does not imply the second part. With distance to mate there would be just as many probes (but they'd take long...
by syzygy
Sat Sep 08, 2018 2:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 549
Views: 77576

Re: 7-men Syzygy attempt

Comparing file sizes is sufficient to ensure that your files are up to date and do not include any of the files that were found to be incorrect due to problems with the generator. The internal checksum is sufficient to ensure that your files were not corrupted during transmission or while being stor...