< Earlier Kibitzing · PAGE 12 OF 12 ·
|Jan-10-18|| ||scholes: Current sf dev version now 50 elo stronger than sf8. Halfway to alphazero ☺️|
|Jan-26-18|| ||chesslab0: Dear chessfriends, the 19th (already) FICGS correspondence chess WCH waiting list is now open, all tournaments should start on March 1st, 2018... Stockfish and Houdini are kind of required here :) ... and yes, after all these years GM Eros Riccio is still FICGS correspondence chess champion!|
If you're IM or GM (basically rated over 2350) and used to chess engines, you may get the opportunity to enter the knockout tournament to reach the candidates final. We really need the participation of the strongest corr. chess players to shake the crown, join the fun :)
You can replay the games of the 14th WCH final match here:
By the way, for more convenience FICGS now has applications for Android that you can find here:
|Feb-01-18|| ||scholes: Stockfish 9 released. 60 elo stronger than sf8 in self test. Would be more in rating list due to new contempt in sf9. Stockfish has 20 as default contempt. Use 0 contempt for analysis unless you what it does.|
|Feb-03-18|| ||zanzibar: SF download page:
Apparently an early release got out, somewhat mistakenly:
(Thanks <scholes> for that tip - but aren't the parameter settings the responsibility of whatever UCI interface one is using?)
|Feb-03-18|| ||zanzibar: Oh, wait, the engines can be run stand-alone too, though I rarely do that.|
Was the contempt setting then changed between v8 and v9?
|Feb-03-18|| ||scholes: Yes in jan 2018 it was changed from 0 to 20. Largest contempt value which doesn't causes regression.|
No you a chess hui does not change uci parameters by default. Only a user can change it.
|Feb-03-18|| ||zanzibar: <scholes> I run SCID, and it's gui has a UCI configure engine dialogue box.|
When I run it with SF9 it comes up with Contempt = 0.
Is there any method for testing what Contempt setting an engine really is running with other than looking at the UCI configure window?
PS- I disagree with the statement that only a user can change it - as the gui's can store settings and send them to the engine at startup. I haven't looked at the details of the code - so I don't exactly who does what, when.
|Feb-03-18|| ||zanzibar: <scholes> Apologies - but my previous post is in error, probably because I didn't properly do the SF8 to SF9 upgrade.|
Redoing it you were right, the SF9 engine does have the new Contempt setting by default when first starting. SCID's UIC config dialog can be used to reset it, and thereafter use the new setting (I put it back to 0).
|Apr-14-18|| ||HeMateMe: stock up!
<Stockfish is the winner of the Top Chess Engine Championship (TCEC) Season 11. The open source engine by Marco Costalba, Joona Kiiski, Gary Linscott and a huge community of contributors, defeated last year’s champion Houdini and crowned itself the new Grand Champion of the competition.
This is the third title for Stockfish, after the victories in Season 6 and Season 9. However, this time Stockfish created history by winning the title in a one of a kind landslide victory. After 85 games Stockfish had the necessary 50,5 points (18 victories, 65 draws, and only two losses), with 15 games to spare the title was in the hands of the open source engine.>
|Apr-26-18|| ||Penguincw: Love the profile pic.
Stockfish 9 recently played a match on lichess.org vs. Neural Network AI Leela Chess Zero ID:185, which is similar to AlphaZero.
Here are the games and more: https://www.youtube.com/watch?v=tpk....
|May-18-18|| ||oolalimk1: in the last 21 games here Stockfish did not win a single game.|
|Aug-11-18|| ||Penguincw: Norwegian Stockfish 160518 finishes tied for 1st at the TCEC Season 12 - Premier Division tournament, with 24.5/39.|
|Nov-30-18|| ||WorstPlayerEver: Congrats on your 10th anniversary!|
|Nov-30-18|| ||scholes: sf 10 released
|Dec-10-18|| ||Telemus: Stockfish is quite strong, but it seems to be difficult to analyse with it. See what I mean.|
SF 10 evaluates the starting position at depths 25-30 as favouring White: at least +0.57. But if I execute its favourite move (e4), then - at the same depths - the evaluation is close to 0.00, several times even negative. The same observation holds for many opening positions and I oberved it already with SF 9.
Did anybody else notice that SF enjoys to have the move so much? And how shall I analyse with it?
I also like evaluation profiles of whole games (e.g. https://uscfsales.wordpress.com/201...). But if I use SF for evaluation it varies from ply to ply so often by 50+ centipawns, although the best move was played. In these cases the impression one gets from the profile is absolutely misleading.
|Dec-10-18|| ||zanzibar: <<Telemus> Did anybody else notice that SF enjoys to have the move so much? And how shall I analyse with it?>|
I've made similar observations/comments several times in the past.
It's misleading because of aggressive adaptive pruning, or so I believe, where SF seems to be getting stuck in a local min/max.
Playing a given move forces it to explore that move to a similar depth, seeding the cache properly, if returning to original position.
Some people have suggested not trusting SF at least than a depth of 40-ply or more, which puts it outside the powerband of my laptop for definitive analysis.
I still use it, put try to walk through the actual game moves to seed a position before letting it really simmer the pot/position.
|Dec-10-18|| ||Molotok: <Telemus> This is a feature called contempt which adds some amount of centipawns to evaluation so that the engine tries to avoid draws by picking slightly "worse" positions that let the game continue. It was to counter the old weakness of SF8 that had the tendency to quickly accept draws against much weaker opponents and was introduced in SF9. I think you can at least turn it off for analysis by switching "analysis contempt" option to "off".|
|Dec-11-18|| ||Telemus: <zanzibar> <Molotok> Thank you very much for your replies!|
<Molotok: contempt> That worked!
Stockfish describes the parameter as follows:
<option name Contempt type spin default X min -100 max 100>
where X = 24 for SF10, X = 20 for SF9, and X = 0 for SF8. (Looks like the default behaviour for analysis vs play was changed from SF8 to SF9.)
In my old Chessbase GUI one can set this parameter during engine installation (it failed to change it for an existing engine).
In general, a GUI has to send the UCI command
<setoption name Contempt value 0>
|Feb-16-19|| ||offramp: Stockfish 190203 (3588) versus LCZero v20.2-32930 (3404). |
TCEC Season 14 - Superfinal 16.1 2019.02.07 1-0 B06 Robatsch (modern) defence 120' + 15".
Can you see SF's surprise move?
click for larger view
White to move.
|Feb-16-19|| ||vonKrolock: Leela crashed in an equal position during the 66th game...|
|May-03-19|| ||Ron: Hopefully a small contribution to chess knowledge:|
In the following position, Black to play:
click for larger view
Stockfish 9 evaluates the position: + (1.21) Depth=59/68 0:20:01 2824 MN
However, that is an over evaluation.
There is a drawing line--only one--for Black which starts with Rb3
|May-26-19|| ||MissScarlett: Is <Arena> the best <UCI-compatible> program to use with Stockshit or are they much of a muchness?|
|Jul-27-19|| ||Ron: In the following position, White to play:
click for larger view
White is up a pawn, but its a draw due to opposite colored bishops.
Stockfish 9 over-evaluates this position for White:
+ (1.01) Depth=87/89 2286 kN/s
The Monte Carlo methods used by Rybka and AlphaZero would probably determine an accurate evaluation.
|Jul-27-19|| ||AylerKupp: <<MissScarlett> Is <Arena> the best <UCI-compatible> program to use with Stockshit or are they much of a muchness?>|
I don't think that you can say that any chess engine GUI that supports the UCI protocol can be considered better or worse to use with a particular engine. The motivation behind the UCI protocol (and any protocol) is to be able to communicate with any chess engine that supports that protocol without knowing what engine it is communicating with.
The "goodness" of a GUI is what it allows you to do and how easily it allows you to do it. I personally use Area because it supports many of the things that I want to do with chess engines (run analyses, play games against it, conduct engine vs. engine tournaments, etc.). And once you get over its somewhat steep learning curve, it works well. And, as a bonus, it's free.
|Jul-31-19|| ||gambitfan: Can we trust Stockfish ?
In the Opening Explorer, after 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 d6 5 d4 ?! (2 games · 1871-1949) the Opening Explorer gives 5 ... exd4 (126 games) or 5 ... Nxd4 (1 game)
Stockfish gives :
1) -0.42 (18 ply) 5...♗xd4 6.♘g5 ♘h6 7.c3 ♗b6 8.h3 O-O 9.♘f3 ♘a5 10.♗d3 ♗e6 11.♘a3 ♘c6 12.♘g5 ♗d7 13.♘c4 ♔h8 14.♘xb6
On chess.com this move is said as an INACCURACY...
What can we think of Sockfish ???
< Earlier Kibitzing · PAGE 12 OF 12 ·