Search found 448 matches

by jhellis3
Tue Jun 16, 2020 6:36 pm
Forum: Computer Chess Club: General Topics
Topic: TCEC Kibitzing
Replies: 8
Views: 642

Re: TCEC Kibitzing

Dann's question was about kibitzing, not just watching....
by jhellis3
Tue Jun 16, 2020 3:05 pm
Forum: Computer Chess Club: General Topics
Topic: TCEC Kibitzing
Replies: 8
Views: 642

Re: TCEC Kibitzing

You have to have a twitch account and follow TCEC on twitch (following is free).
by jhellis3
Sun Jun 14, 2020 1:20 pm
Forum: Computer Chess Club: General Topics
Topic: I think Crystal must have an eval bug
Replies: 5
Views: 332

Re: I think Crystal must have an eval bug

Yes, Crystal will often have the most unstable eval out of all the engines, by design. At least when the position is not a draw :wink: . The other AB engines do not have progress detection (or at least not to the level of Crystal) either. There are also many situations where Crystal has had both the...
by jhellis3
Sun Jun 14, 2020 12:52 pm
Forum: Computer Chess Club: General Topics
Topic: I think Crystal must have an eval bug
Replies: 5
Views: 332

Re: I think Crystal must have an eval bug

No...

Crystal does not touch eval except to reduce it for shuffling. What you are perceiving is the result of mcts eval being very stable and Crystal exploring suboptimal paths, correcting the score, and switching off of them.
by jhellis3
Sat Jun 06, 2020 6:33 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

Crystal evaluates the position after 74.Rdxa6 with 97+ correctly at once having it on board, why can't it "see" this one on disk stored 6men just 1 ply befor It does see it; it is just allowed to search beyond the TB hit. In most TB win situations, the engine will also score them favorably, and mat...
by jhellis3
Fri Jun 05, 2020 8:14 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

Ok, here is what is going on... Crystal is allowed to search normally on non-draw tb hits, and thus display the engine eval (typically mates) over the TB score much sooner. However, in very difficult to resolve situations, such as the fen posted you still get the engine eval, but it displays drawish...
by jhellis3
Fri Jun 05, 2020 3:50 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

Ok, I created 3 versions to test labeled a, b, & c.

Please try on original fen: 8/8/p4k2/R7/3R2K1/1r1n4/8/8 w - - 0 73

https://www.dropbox.com/s/rrtz6m69s8smn ... al.7z?dl=1
by jhellis3
Fri Jun 05, 2020 2:01 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

Nah, it is not a bug, it can appear that way though. It is working as intended. There are a couple of things which can be tried to address the cosmetics though. I will probably upload a couple of exes later today for people to test.
by jhellis3
Thu Jun 04, 2020 11:09 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

Well, this is certainly interesting... It shows the correct & expected score of 97.97 at depths 14 and 15. Then the score gets overwritten. This can happen and is allowed, but when overwritten by a lower score, the TBs should activate once again and keep overwriting any non winning score. This is qu...
by jhellis3
Thu Jun 04, 2020 9:17 pm
Forum: Computer Chess Club: General Topics
Topic: Bug in Crystal ?
Replies: 17
Views: 970

Re: Bug in Crystal ?

I don't think the issue has anything to do with the hash since you have a 7 man file. It should show the correct result regardless in that case. Though I wonder if not having both DTZ and WDL are causing an issue there. Regardless, the search to a 6 piece position from there should be trivial... the...