Search found 33 matches

by Necromancer
Fri May 17, 2019 8:53 pm
Forum: Chess Players Forum
Topic: Is magnus carlsen the greatest human player ever?
Replies: 8
Views: 3220

Re: Is magnus carlsen the greatest human player ever?

If its true (I don't think it is) then the guy he beat after 12 draws and no wins must be the second best ever. Could you imagine Bobby Fischer drawing 12 straight games with no wins in his prime against someone in a championship match? Like engines, human players also evolve. Carlsen plays stronge...
by Necromancer
Thu May 16, 2019 9:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: new axolotl
Replies: 5
Views: 1379

Re: new axolotl

For king safety I follow more or less what is described here (Attacking King Zone section). https://www.chessprogramming.org/King_Safety For each attacking piece it just counts the attack intersection against the enemy king region and do a weighted sum. This is something I also need to improve. I al...
by Necromancer
Thu May 16, 2019 7:35 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: new axolotl
Replies: 5
Views: 1379

Re: new axolotl

I think it's better to consider only the best move in order to track progress, then you can run a regression to estimate ELO. http://www.talkchess.com/forum3/viewtopic.php?t=56667 When I change my engine I like to run the STS tests 10 times (at 50 ms per move) to see if it improved, if yes then I ru...
by Necromancer
Thu May 16, 2019 1:04 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: new axolotl
Replies: 5
Views: 1379

Re: new axolotl

What are your results for the sts tests? I mean the file with 1500 positions.

I could not run java -jar axolotl_v1.8.jar, my Java version is "1.8.0_101".
by Necromancer
Tue May 14, 2019 5:47 am
Forum: Chess Players Forum
Topic: Is magnus carlsen the greatest human player ever?
Replies: 8
Views: 3220

Re: Is magnus carlsen the greatest human player ever?

Given his Rating x achievements x age, I think that is a big YES. The fact that he is from the "computer era" just reinforces this.
by Necromancer
Tue May 14, 2019 5:26 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Weird results Tunguska 1.1 vs Jonny 4.0
Replies: 20
Views: 4277

Re: Weird results Tunguska 1.1 vs Jonny 4.0

Was the test single threaded? Jonny could be misconfigured. There are many other possibilities. I don't know, it's from CCRL 40/4. Reading about Jonny ...Jonny uses a 0x88 board representation, and applies a sophisticated distributed and parallel search. So maybe that was the problem, thanks!
by Necromancer
Tue May 14, 2019 4:50 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Weird results Tunguska 1.1 vs Jonny 4.0
Replies: 20
Views: 4277

Weird results Tunguska 1.1 vs Jonny 4.0

So while browsing my engine results at http://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Tunguska%201.1%2064-bit#Tunguska_1_1_64-bit I saw this: Tunguska 1.1 (2471) vs Jonny 4.0 (2746) +36−5=8 It's a 275 ELO difference, so Tunguska winning chances are ~17%. I saw...
by Necromancer
Thu May 09, 2019 1:39 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tunguska 1.1 STS test results - improve eval
Replies: 9
Views: 1448

Re: Tunguska 1.1 STS test results - improve eval

After 5350 games (100 ms fixed per move, hash table 256MB): score of Tunguska mob vs. Tunguska dev = 50.69% +/- 1.09% So almost no improvement for a ~2450 engine. Here is my mobility code along with the bonus which I copied from some other engine. I know that the endgames bonuses should be different...
by Necromancer
Wed May 08, 2019 1:50 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tunguska 1.1 STS test results - improve eval
Replies: 9
Views: 1448

Re: Tunguska 1.1 STS test results - improve eval

That's very good to hear, because Tunguska needs some ELO :roll: I follow more or less the idea of a mobility area (don't count squares where enemy pawns are attacking). I use magic bitboards for attack generation, so I don't think it's slow (it is of course relatively slow, compared to other parts ...
by Necromancer
Mon May 06, 2019 4:45 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tunguska 1.1 STS test results - improve eval
Replies: 9
Views: 1448

Re: Tunguska 1.1 STS test results - improve eval

Yep, I'll try these things out. Actually, I have disabled many eval terms, either because they are not tuned or because they lose ELO. Mobility is a example that loses ELO. Bishop pair bonus, piece values and attack weights were tuned using texel, which gave me a good ELO boost (especially piece val...