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Stockfish (Computer)
Number of games in database: 368
Years covered: 2009 to 2021
Overall record: +48 -81 =239 (45.5%)*
   * Overall winning percentage = (wins+draws/2) / total games.

Repertoire Explorer
Most played openings
E15 Queen's Indian (25 games)
E17 Queen's Indian (12 games)
C67 Ruy Lopez (12 games)
A17 English (11 games)
C11 French (10 games)
C65 Ruy Lopez, Berlin Defense (8 games)
A10 English (7 games)
D16 Queen's Gambit Declined Slav (6 games)
C02 French, Advance (6 games)
E21 Nimzo-Indian, Three Knights (6 games)

   🏆 King's Indian Defense thematic engine tournament
   AnMon vs Stockfish (Sep-22-21) 0-1, rapid
   AlphaZero vs Stockfish (Jan-18-18) 1-0
   AlphaZero vs Stockfish (Jan-18-18) 1-0
   AlphaZero vs Stockfish (Jan-18-18) 1-0
   AlphaZero vs Stockfish (Jan-18-18) 1-0

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(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 368  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. Houdini vs Stockfish  ½-½412013nTCEC - Superfinal - SeasonD45 Queen's Gambit Declined Semi-Slav
14. Stockfish vs Houdini  ½-½612013nTCEC - Superfinal - SeasonD45 Queen's Gambit Declined Semi-Slav
15. Houdini vs Stockfish ½-½692013nTCEC - Superfinal - SeasonE15 Queen's Indian
16. Stockfish vs Houdini ½-½872013nTCEC - Superfinal - SeasonE12 Queen's Indian
17. Houdini vs Stockfish 1-0532013nTCEC - Superfinal - SeasonD98 Grunfeld, Russian
18. Stockfish vs Houdini  ½-½562013nTCEC - Superfinal - Season 1D99 Grunfeld Defense, Smyslov
19. Houdini vs Stockfish  ½-½602013nTCEC - Superfinal - Season 1B04 Alekhine's Defense, Modern
20. Stockfish vs Houdini ½-½1092013nTCEC - Superfinal - Season 1B04 Alekhine's Defense, Modern
21. Houdini vs Stockfish  1-0672013nTCEC - Superfinal - SeasonE04 Catalan, Open, 5.Nf3
22. Stockfish vs Houdini  ½-½602013nTCEC - Superfinal - SeasonE04 Catalan, Open, 5.Nf3
23. Houdini vs Stockfish  ½-½802013nTCEC - Superfinal - SeasonC14 French, Classical
24. Stockfish vs Houdini ½-½592013nTCEC - Superfinal - SeasonC14 French, Classical
25. Houdini vs Stockfish 1-0792013nTCEC - Superfinal - SeasonA10 English
 page 1 of 15; games 1-25 of 368  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 1 OF 14 ·  Later Kibitzing>
Premium Chessgames Member
  BishopBerkeley: I see that Stockfish is second only to Rybka (Computer) in two of the major computer Chess engine ratings lists (as of this date):

More on Stockfish here [numeric references in the article]:

=== begin quoted text ===

Stockfish is an open source chess engine, developed by Tord Romstad, Joona Kiiski and Marco Costalba and licensed under the GNU General Public License version 3. The current version 1.7.1 (as of April 10, 2010) is available as C++ source code, and also has precompiled versions for Microsoft Windows, Linux 32-bit/64-bit and Mac OS X Snow Leopard 64-bit available. The program uses the UCI protocol and can therefore be operated under various graphical interfaces. It can use up to eight CPU cores in multiprocessor systems. The maximum size of the transposition tables is eight gigabytes. Stockfish implements an advanced alpha-beta search and uses bitboards.

In various computer chess rankings Stockfish 1.7.1 is second behind the top commercial program Rybka and just ahead of Naum.[1][2]

The program originated from another open source program by Romstad named Glaurung. Stockfish was forked from the 2.1 version of Glaurung; the latest Glaurung version 2.2 was released December 2008 but is no longer developed.

=== end quoted text ===

Good to have a new strong competitor!

(: ♗ Bishop Berkeley ♗ :)

May-26-10  mrbasso: Only because IPPOLIT and its derivatives don't get tested.
Jun-07-10  Albertan: GM Lubomir Kavalek annotates the Stockfish 1.71 over Deep Rybka 4 at the following website: .

This game took place at a Computer tournament in Norway, on 30.05.2010.

Jul-10-10  Xaurus: Albertan, I was the one hosting that tournament. Kind of fun when profiled people pick up the games!

On a similar note:

The big match has begun, between Stockfish 1.8 and Rybka 4.

Follow it live here:

It will last for about 2 weeks (48 games).

Jul-10-10  notyetagm: <mrbasso: Only because IPPOLIT and its derivatives don't get tested.>

Yes, both <HOUDINI 1.02> and <IVANHOE R57A> are just as strong as Rybka 4.

<HOUDINI 1.03> is scheduled to be released on July 15th so we may be only 5 days away from having an engine that is already(!) stronger than Rybka 4.

Jul-10-10  I Like Fish: hello ...

i like stockfish ...
too ...

Jul-10-10  ILoveFruits: indeed...
there's also...
Jul-10-10  ILoveFruits: Rybka...
my spelling...
Jul-17-10  notyetagm: <HOUDININ 1.03A> is out!

Jul-22-10  Xaurus: <notyetagm>

Houdini 1.03a is facing Stockfish 1.8 in a 32-game match which just started.

Jul-22-10  newton296: houdini got beat by rybka 4 ! so did stockfish. r4 is the king !
Jul-30-10  Xaurus: TCEC Tournament 1 has started.

Apr-29-11  SugarDom: Bill Wall and Open Defense Draws with Stockfish

Apr-23-13  Xaurus: nTCEC Season 1 – Superfinal starts Friday April 26th at 19:00 UTC+2.

Houdini vs Stockfish.

nTCEC is using 150m + 60s per move for the whole game, running on a dual Intel Xeon E5-2689 @ 3300 MHz. 16 cores will be used for each engine.

Apr-23-13  Appaz: The programmers name is misspelled in the bio, it should be Tord Romstad.
Aug-22-13  cbpatzer: Stockfish 4 is out now!
Premium Chessgames Member
  al wazir: I took a very cursory look at recent computer games. Based on that, I get the impression that Stockfish is the biggest, baddest fish currently swimming in the chess pond. (If I'm wrong, please correct me.)

However, I found no Stockfish vs. Stockfish games in the database. This may be because such games would run afoul of the <> software, which was probably written with the idea that a game must be played between two different players, who necessarily have different names. But I think a Stockfish vs. Stockfish match of, say, 20 games would be very interesting, assuming that the two sides used identical computers and identical programs. If, for example, white won more often than black, that might be taken to suggest that the program's opening book is slanted in white's favor. Alternatively, it could be taken as an approximate measure of white's intrinsic advantage.

Does anyone know if anything like this has ever been tried?

Nov-21-13  galdur: Stockfish is the big bad fish now.

SF vs Komodo, TCEC stage 4. These are the finalists in stage 5.

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5 Nbd7 6. g3 g6 7. Bg2 Bg7 8. Bf4 O-O 9. O-O Re8 10. Rc1 Nh5 11. Bg5 Nhf6 12. Na4 h6 13. Bd2 Ra7 14. b3 a5 15. Bc3 Ne4 16. Bb2 h5 17. Re1 Qc7 18. Qc2 Rd8 19. e3 Re8 20. Red1 Bh6 21. Rf1 Bg7 22. Rfe1 Rd8 23. Nd2 Nef6 24. f3 Ra6 25. e4 dxe4 26. fxe4 h4 27. gxh4 Qf4 28. Nf3 Nf8 29. Rcd1 Bg4 30. Bc1 Qc7 31. Qc4 Be6 32. Qf1 Bg4 33. h3 Bh5 34. Rd3 Ne6 35. e5 Nd5 36. Ng5 Rf8 37. Bf3 Nb4 38. Bxh5 Nxd3 39. Qxd3 Nxg5 40. Bg4 Ne6 41. Bxe6 fxe6 42. Qxg6 Qd7 43. Re4 Qe8 44. Qxe6+ Qf7 45. Qxf7+ Rxf7 46. Nb6 a4 47. bxa4 Rf5 48. Bg5 e6 49. Rg4 Kh7 50. h5 Rf3 51. h4 Bh6 52. Kg2 Rf7 53. Bf6 Rf8 54. Rg6 Rg8 55. Rxg8 Kxg8 56. Bg5 Kg7 57. Kf2 Ra5 58. Ke2 Kh7 59. Kd3 Bf8 60. Kc4 Ra6 61. Kb3 Kg7 62. Nc4 Ra8 63. a5 Kh7 64. Kc3 Bh6 65. Kb4 Rf8 66. Nd6 Rf1 67. a6 bxa6 68. Ka5 Rd1 69. Kb6 Rxd4 70. Kxc6 Bg7 71. Bf6 Rd5 72. Bxg7 Kxg7 1-0

Nov-21-13  InfinityCircuit: <al wazir> There have been (literally) tens of millions of Stockfish-Stockfish games, if not more:

Most are at very short time controls: 15 seconds or 60 seconds a side, with proportional increment.

Of course, these aren't PGNs. But I'd encourage you to just run Stockfish against itself on your own hardware! I always find it fun to see.

And Stockfish is the best at the moment, a stunning +11 =19 -0 in Stage 4 of nTCEC Season 2, including three wins over Houdini dev.

Nov-21-13  galdur: There have been several other beautiful chess concepts by the fish and others that should be included in the database here.
Jan-04-14  supertimchan: The version that was used in TCEC is now available on the App Store for free! SmallFish has been updated with the Stockfish DD engine.

Jan-04-14  MarkFinan: <supertimchan> I have that droidfish DD. I find it easier to play against by adjusting its strength and playing time than I did with shredder where you go up in levels. I also used to reach about 12-13 and really struggle but I have had it much higher. Depended on how sharp I felt that month, or how busy / not busy I was. I kept having to re download shredder and start from level 1 again, every 30 days which was annoying because some months I wouldn't even get past level 10. Top app is droiders 😄
Jan-04-14  supertimchan: <MarkFinan> Yeah. I understand your frustration. I also don't like to start from level 0. I know my own strength, I'd like to decide how strong my computer should play.

Droidfish is a cool app. But it lacks graphics. It works but sometimes I think we're like back in the old days.

Jan-04-14  MarkFinan: I don't mind the interface, in fact I prefer it to the free version of shredder I had. What level do you set droidfish on and what time setting, if you don't mind me asking?? I have it on 62% right now, and if im feeling sharp and in the right mood *and* I have the white pieces I beat it. I lose more than I win, but I do beat it pretty often.
Jan-04-14  MarkFinan: Btw I only play stockfish (droidfish) on my phone. I do have a computer that I could download a few of the best free engines out, but I don't use it! Don't need to nowadays for chess because the phones are just as good..
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