Search found 1445 matches

by Ajedrecista
Fri Jul 10, 2020 7:04 pm
Forum: Computer Chess Club: General Topics
Topic: Lc0 evaluation of startpos is -2147483648
Replies: 5
Views: 287

Re: Lc0 evaluation of startpos is -2147483648.

Hello Louis: Anyone else seeing stuff like this from Lc0? info depth 18 seldepth 53 time 196336 nodes 2568924 score cp -2147483648 wdl -2147483648 1000 -2147483648 nps 13283 tbhits 0 pv e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c1e3 f8c5 d1d3 e8g8 c2c3 d8e7 b1d2...
by Ajedrecista
Tue Jul 07, 2020 5:45 pm
Forum: Computer Chess Club: General Topics
Topic: KnightX v2.1b, June 2020
Replies: 2
Views: 174

Re: KnightX v2.1b, June 2020.

Hello: I did not success in finding Knightx 2.1b for Linux. The readme of the web lists a bunch of versions: Versions -------- v2.3, June 2020 v2.21, June 2020 v2.1b, June 2020 v2.0, May 2020 v1.99, May 2020 v1.98, January 2020 v1.97a, October 2019 v1.97, October 2019 v1.96, September 2019 v1.95, Ju...
by Ajedrecista
Sun Jul 05, 2020 11:34 am
Forum: Computer Chess Club: General Topics
Topic: Annotations of TCEC PGN games?
Replies: 3
Views: 184

Re: Annotations of TCEC PGN games?

Hello: I am interested in the way TCEC stored rick data in its PGN games (store information such as depth, score, pv, tb hit, move time... in moves' comments). I may make my chess GUI (BanksiaGUI) to support it. However, I can't find the full list of its annotations. GG gave me the meaning of only a...
by Ajedrecista
Thu Jul 02, 2020 6:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 2676

Re: Throwing out draws to calculate Elo.

Hello: It is true that my result is rather unexpected (especially after only 14,000 games), but if I had let the games run all the way to 100,000 as I had originally intended, the LOS value would have been very close to either 0 or 1 as Ajedrecista proved in his analysis. Edit: Last night, when I we...
by Ajedrecista
Thu Jul 02, 2020 6:23 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 2676

Re: Throwing out draws to calculate Elo.

Hello Dann: I think this analysis is pretty good. Like I said, long matches destroy LOS. Now, here is the burning question: In a short, N game match, do you trust LOS since there is randomness in the outcome of chess games? IOW, is there any reason to believe that the accuracy of wins, losses and dr...
by Ajedrecista
Thu Jul 02, 2020 11:17 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 2676

Re: Throwing out draws to calculate Elo.

Hello Dann: AFAIK, LOS is intended to be applied in a single n-game match, not through k n-game matches (you are usually running k = n, so n matches of n games each one). I think it is the key. If you average the n LOS results from the n matches, you will get <LOS> = (1/n)*SUM(LOS_i ; i = 1, ..., n)...
by Ajedrecista
Wed Jul 01, 2020 4:28 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: GCC 8.1 vs GCC 10.1
Replies: 21
Views: 762

Re: GCC 8.1 vs GCC 10.1.

Hello Gabor: Hi all, I am not a programmer but still have successfully compiled some C or C++ engines using GCC 8.1. I have now installed GCC 10.1 and I noticed that the file sizes I obtain using it are much bigger than the ones made with 8.1. Also, the executables are slower. I have an i5-4690K (Ha...
by Ajedrecista
Tue Jun 30, 2020 10:10 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 2676

Re: Throwing out draws to calculate Elo.

Hello: The well-known problem of checking whether a coin is fair might be on topic here, reinforcing HGM's POV of sigma. I posted a similar thought about binomial distribution in a recent topic at General Topics section which is somewhat related to this thread. I see it in the following way: after m...
by Ajedrecista
Mon Jun 29, 2020 7:58 am
Forum: Computer Chess Club: General Topics
Topic: How good is your engine?
Replies: 32
Views: 727

Re: How good is your engine?

Hello Dann: And 10,000: losses: 4857 wins: 5143 ties: 0 [...] losses: 5000 wins: 5000 ties: 0 [...] losses: 5156 wins: 4844 ties: 0 So now you know why CCRL and CEGT run all those games. Wouldn't it be the direct application of the binomial distribution with P = 0.5? Then: n = wins + losses (n >> 1)...
by Ajedrecista
Sun Jun 28, 2020 12:25 pm
Forum: Computer Chess Club: General Topics
Topic: Should SF solve these positions at lower depths?
Replies: 3
Views: 100

Re: Should SF solve these positions at lower depths?

Hello Louis: Very true! I forgot about searchmoves, thank you very much. I was analysing under Arena and I wanted to see how each move stands with others. Anyway, your SF search also agrees in big jumps, more than 300 cp in your case in an only depth, no less than at depth 23, which looks insane. Th...