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Stockfish (Computer)
Number of games in database: 366
Years covered: 2009 to 2018

Overall record: +45 -80 =237 (45.2%)*
   * Overall winning percentage = (wins+draws/2) / total games in the database. 4 exhibition games, blitz/rapid, odds games, etc. are excluded from this statistic.

With the White pieces:
 Ruy Lopez (27) 
    C67 C65 C95 C69 C63
 Sicilian (19) 
    B80 B90 B40 B32 B78
 French Defense (9) 
    C11 C14 C02 C18 C12
 King's Indian (7) 
    E81 E84 E60 E99 E87
 Slav (6) 
    D16 D17 D14 D10
 Giuoco Piano (6) 
    C50 C53
With the Black pieces:
 Queen's Indian (43) 
    E15 E17 E16 E18 E12
 French Defense (19) 
    C11 C02 C18 C14 C05
 Sicilian (18) 
    B80 B48 B40 B43 B78
 English (16) 
    A17 A10 A18 A15
 Nimzo Indian (16) 
    E21 E47 E46 E32 E53
 Queen's Pawn Game (12) 
    E00 A45 E10 D02 A50
Repertoire Explorer

NOTABLE GAMES: [what is this?]
   Stockfish vs Jonny, 2014 1-0
   Stockfish vs AlphaZero, 2018 1-0
   Stockfish vs Rybka, 2013 1-0
   Stockfish vs Critter, 2014 1-0
   Stockfish vs AlphaZero, 2018 1/2-1/2
   Stockfish vs AlphaZero, 2018 1/2-1/2
   AlphaZero vs Stockfish, 2018 1/2-1/2
   AlphaZero vs Stockfish, 2018 1/2-1/2
   Komodo vs Stockfish, 2014 0-1
   Houdini vs Stockfish, 2013 0-1

NOTABLE TOURNAMENTS: [what is this?]
   Stockfish Nakamura Match (2014)
   AlphaZero - Stockfish Match (2018)

GAME COLLECTIONS: [what is this?]
   Engine Brilliancies by Zhbugnoimt
   scholes' favorite games by scholes
   nTCEC Computer Chess Tournament by shoshonte

   The World vs N Pogonina, 2010
   The World vs A Nickel, 2006
   S Williams vs The World, 2013
   Battle of the Brains II, 2008
   Battle of the Brains 3, 2009

   🏆 AlphaZero - Stockfish Match
   AlphaZero vs Stockfish (Jan-18-18) 1-0
   AlphaZero vs Stockfish (Jan-18-18) 1-0
   AlphaZero vs Stockfish (Jan-18-18) 1/2-1/2
   AlphaZero vs Stockfish (Jan-18-18) 1/2-1/2
   AlphaZero vs Stockfish (Jan-18-18) 1-0

Search Sacrifice Explorer for Stockfish (Computer)
Search Google for Stockfish (Computer)

(born 2008) Norway

[what is this?]

Stockfish originated as a fork of Tord Romstad's Glaurung (Computer), improved by Marco Costalba, Romstad and Joona Kiiski. It is now developed by the Stockfish community, using Gary Linscott's Fishtest testing framework to test new code.

As of 2016, Stockfish is one of the two strongest chess engines in the world, with Komodo (Computer), and the strongest open-source engine. It won TCEC season 6 in 2014, defeating Komodo in the superfinal.

Stockfish runs on Linux, Windows or Mac OS X platforms, as well as mobile platforms such as the iPhone, iPad and iPod touch. Various installations have supported set-ups such as 8 Gbytes for a hashtable with an 8-core processor under its UCI protocol.

Official website:

SmallFish app for iPad/iPhone with iOS 8.0 or later:

SmallFish for iOS 6:

Stockfish 2.0.1, operated by User: kutztown46, played in the Masters - Machines Invitational (2011) as Kutztown46 / Stockfish.

Wikipedia article: Stockfish (chess)

Last updated: 2018-12-03 07:10:17

 page 1 of 15; games 1-25 of 366  PGN Download
Game  ResultMoves YearEvent/LocaleOpening
1. Stockfish vs Rybka 0-17820093rd WCRCCD14 Queen's Gambit Declined Slav, Exchange Variation
2. Stockfish vs Crafty  1-0742013nTCEC - Stage 1A10 English
3. Stockfish vs Rybka  1-0662013nTCEC - Stage 1B53 Sicilian
4. Stockfish vs Critter  ½-½672013nTCEC - Stage 2aA10 English
5. Critter vs Stockfish ½-½562013nTCEC - Stage 2aA10 English
6. Stockfish vs Rybka  0-1532013nTCEC - Stage 3B33 Sicilian
7. Stockfish vs Chiron  1-0522013nTCEC - Stage 3C12 French, McCutcheon
8. HIARCS vs Stockfish 0-1542013nTCEC - Stage 3A52 Budapest Gambit
9. Stockfish vs Rybka 1-0422013nTCEC - Stage 4B03 Alekhine's Defense
10. Houdini vs Stockfish  0-1872013nTCEC - Stage 4C18 French, Winawer
11. Rybka vs Stockfish  ½-½422013nTCEC - Stage 4B03 Alekhine's Defense
12. Stockfish vs Houdini  0-1762013nTCEC - Stage 4 - Season 1C70 Ruy Lopez
13. Stockfish vs Houdini  ½-½612013nTCEC - Superfinal - SeasonD45 Queen's Gambit Declined Semi-Slav
14. Houdini vs Stockfish  ½-½412013nTCEC - Superfinal - SeasonD45 Queen's Gambit Declined Semi-Slav
15. Stockfish vs Houdini  ½-½562013nTCEC - Superfinal - Season 1D99 Grunfeld Defense, Smyslov
16. Houdini vs Stockfish 1-0532013nTCEC - Superfinal - SeasonD98 Grunfeld, Russian
17. Stockfish vs Houdini ½-½872013nTCEC - Superfinal - SeasonE12 Queen's Indian
18. Houdini vs Stockfish ½-½692013nTCEC - Superfinal - SeasonE15 Queen's Indian
19. Stockfish vs Houdini  ½-½602013nTCEC - Superfinal - SeasonE04 Catalan, Open, 5.Nf3
20. Houdini vs Stockfish  1-0672013nTCEC - Superfinal - SeasonE04 Catalan, Open, 5.Nf3
21. Stockfish vs Houdini ½-½1092013nTCEC - Superfinal - Season 1B04 Alekhine's Defense, Modern
22. Houdini vs Stockfish  ½-½602013nTCEC - Superfinal - Season 1B04 Alekhine's Defense, Modern
23. Houdini vs Stockfish  ½-½802013nTCEC - Superfinal - SeasonC14 French, Classical
24. Stockfish vs Houdini  ½-½472013nTCEC - Superfinal - SeasonA10 English
25. Houdini vs Stockfish 1-0792013nTCEC - Superfinal - SeasonA10 English
 page 1 of 15; games 1-25 of 366  PGN Download
  REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2) | Stockfish wins | Stockfish loses  

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 12 OF 12 ·  Later Kibitzing>
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).

Again, apologies.

Premium Chessgames Member
  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.>

Premium Chessgames Member
  Penguincw: Love the profile pic.

Stockfish 9 recently played a match on vs. Neural Network AI Leela Chess Zero ID:185, which is similar to AlphaZero.

Here are the games and more:

May-18-18  oolalimk1: in the last 21 games here Stockfish did not win a single game.
Premium Chessgames Member
  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. 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> to Stockfish.

Premium Chessgames Member
  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.

Premium Chessgames Member
  vonKrolock: Leela crashed in an equal position during the 66th game...
Premium Chessgames Member
  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

Premium Chessgames Member
  MissScarlett: Is <Arena> the best <UCI-compatible> program to use with Stockshit or are they much of a muchness?
Premium Chessgames Member
  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.

Premium Chessgames Member
  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.

Premium Chessgames Member
  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 this move is said as an INACCURACY...

What can we think of Sockfish ???

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