Search found 375 matches

by noobpwnftw
Wed Oct 23, 2019 12:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move repetitions in tree search + transpositions
Replies: 13
Views: 2109

Re: Move repetitions in tree search + transpositions

we discard 1.Rc7 and never look at it again It still shouldn't stop you from expanding it under all circumstances. As the tree grows you will eventually expand one of these. Now this is a tricky problem of whether you want to force expanding the node when it is your main line, if you do that, then ...
by noobpwnftw
Tue Oct 22, 2019 7:54 pm
Forum: Computer Chess Club: General Topics
Topic: Ryzen problems - AGAIN!
Replies: 16
Views: 2541

Re: Ryzen problems - AGAIN!

Well the problem is already well-known: https://bugzilla.kernel.org/show_bug.cgi?id=196683 Basically what it takes to be safe is to either use a crippled kernel or a crippled BIOS, which disables C-STATES and turbo boost. What really frustrates me is that for stuff like CPUs I would assume them to ...
by noobpwnftw
Tue Oct 22, 2019 7:31 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move repetitions in tree search + transpositions
Replies: 13
Views: 2109

Re: Move repetitions in tree search + transpositions

Or do you mean we still expand it when the main line wants, but pretend the move history was from the shorter line so to speak? It is not a depth-first search, you do not need to always expand main line nodes to make progress, the search progresses by increasing overall expansion rate and that impr...
by noobpwnftw
Tue Oct 22, 2019 11:14 am
Forum: Computer Chess Club: General Topics
Topic: Ryzen problems - AGAIN!
Replies: 16
Views: 2541

Re: Ryzen problems - AGAIN!

OK, so you have to see if the new Agesa version fixes it. If you have purchased a large quantity of MB's I would talk directly to your MB manufacturer as they may have a partial list of fix the new version will address and be able to give you a firm date when they will release new bios with the bug...
by noobpwnftw
Tue Oct 22, 2019 10:53 am
Forum: Computer Chess Club: General Topics
Topic: Ryzen problems - AGAIN!
Replies: 16
Views: 2541

Re: Ryzen problems - AGAIN!

Well the problem is already well-known: https://bugzilla.kernel.org/show_bug.cgi?id=196683 Basically what it takes to be safe is to either use a crippled kernel or a crippled BIOS, which disables C-STATES and turbo boost. What really frustrates me is that for stuff like CPUs I would assume them to b...
by noobpwnftw
Tue Oct 22, 2019 5:11 am
Forum: Computer Chess Club: General Topics
Topic: Ryzen problems - AGAIN!
Replies: 16
Views: 2541

Ryzen problems - AGAIN!

Previously I had 100 Zen1(Ryzen) chips and they all had the segfault bug, took me more than 3 months to "reproduce" the bug, then 2 attempts before an RMA: the first attempt failed when I told them I had 100 of them, they kick me back and forth between the distributor and AMD customer service, the s...
by noobpwnftw
Tue Oct 22, 2019 2:58 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move repetitions in tree search + transpositions
Replies: 13
Views: 2109

Re: Move repetitions in tree search + transpositions

How is that contradicting? First they make a mistake then you make a mistake back to get to the position. Since your move was a mistake it will hardly be expanded since the better alternative for you would actually be winning. If this ever occurred then apply rule #2 and move on? That's not what I ...
by noobpwnftw
Tue Oct 22, 2019 2:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move repetitions in tree search + transpositions
Replies: 13
Views: 2109

Re: Move repetitions in tree search + transpositions

But what if the shortest path doesn't want to expand it because the shortest path included an opposition mistake which gives us a much better option to focus on? But in the main line where this position shows up later this is the main move which we want to expand a lot? Well that is contradicting: ...
by noobpwnftw
Tue Oct 22, 2019 12:20 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Move repetitions in tree search + transpositions
Replies: 13
Views: 2109

Re: Move repetitions in tree search + transpositions

Very simple: 1. Only the path of globally shortest occurrence of a node gets the right to explore its child. 2. On other occasions treat it as a terminal node and adjust the score locally if the path indicates a repetition. Your search is breadth first, if you get to a node with a longer path, then ...
by noobpwnftw
Mon Oct 21, 2019 7:00 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 114
Views: 20709

Re: Database snapshot

Then we are on the same page, nothing is perfect, but we can make it good enough. Provided this data, I also want to seek for alternative methods that are more efficient in improving this overall confidence level, while one can always go for higher depth/more MultiPV but that is exponentially expens...