Nebula

**[[Home]] * [[Engines]] * Nebula**
|| [[image:Hs-2009-25-e-full_jpg.jpg link="https://en.wikipedia.org/wiki/File:Hs-2009-25-e-full_jpg.jpg"]] ||~ || **Nebula**, (Nebula Chess)
an [[UCI]] compliant chess engine by [[Dragan Zdravkovic]], first released in November 2012. Nebula features [[Chess960]] and can probe [[Nalimov Tablebases]] with up to five pieces. Nebula had a great tournament debut at the [[CCT15]] with 4½ / 7 and 6th place out of 24, and further participated at [[TCEC Season 5]]. ||
|| [[https://en.wikipedia.org/wiki/Carina_Nebula|Carina nebula]] <ref> Composed of gas and dust, the pictured pillar resides in a tempestuous stellar nursery called the [[https://en.wikipedia.org/wiki/Carina_Nebula|Carina Nebula]], located 7500 light-years away in the southern constellation of [[https://en.wikipedia.org/wiki/Carina_%28constellation%29|Carina]], [[https://en.wikipedia.org/wiki/Hubble_Space_Telescope|Hubble's]] [[https://en.wikipedia.org/wiki/Wide_Field_Camera_3|Wide Field Camera 3]] observed the Carina Nebula on  July 24-30, 2009. The composite image was made from filters that isolate emission from [[https://en.wikipedia.org/wiki/Iron|iron]], [[https://en.wikipedia.org/wiki/Magnesium|magnesium]], [[https://en.wikipedia.org/wiki/Oxygen|oxygen]], [[https://en.wikipedia.org/wiki/Hydrogen|hydrogen]] and [[https://en.wikipedia.org/wiki/Sulphur|sulphur]], September 09, 2009, source: [[http://hubblesite.org/newscenter/archive/releases/2009/25/image/e/|HubbleSite - NewsCenter - Hubble Opens New Eyes on the Universe (09/09/2009) - Release Images]], Author: [[https://en.wikipedia.org/wiki/NASA|NASA]], [[https://en.wikipedia.org/wiki/European_Space_Agency|ESA]], and the Hubble SM4 ERO Team. [[https://en.wikipedia.org/wiki/Nebula|Nebula from Wikipedia]]</ref> ||~ ||^ ||
[[toc]]
=Description=
Nebula, apparently a [[Bitboards|bitboard]] engine potentially using the [[SSE4]] [[Population Count|popcnt]] instruction <ref>[[http://www.talkchess.com/forum/viewtopic.php?start=0&t=46208&start=24| Re: Nebula 1.0 released]] by [[Dragan Zdravkovic]], [[CCC]], December 01, 2012</ref>, is able to [[Parallel Search|search in parallel]] on up to 16 processors. [[Selectivity]] is achieved through [[Null Move Pruning|null move pruning]], [[Late Move Reductions|late move reductions]],  [[Futility Pruning|futility pruning]] and since Version 2.0, [[Singular Extensions|singular extensions]] <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=47485&start=5|Re: Nebula 2.0 released]] by [[Dragan Zdravkovic]], [[CCC]], March 13, 2013</ref>. The basic [[Evaluation|evaluation]] considers [[Material|material]], [[Mobility|mobility]], [[Passed Pawn|passed pawns]] and [[King Safety|king safety]], and subsequently [[Piece-Square Tables|piece-square tables]], [[Isolated Pawn|isolated]], [[Doubled Pawn|doubled]], and [[Backward Pawn|backwards pawns]], [[King Safety#PawnStorm|pawn storms]], and [[Candidate Passed Pawn|candidates]], and [[Rook on open file|rook on open/semi-open files]] and [[Rook on seventh|7th rank]] <ref>[[https://sites.google.com/site/nebulachess/|Nebula Chess]]</ref>.

=Selected Games=
[[CCT15]], round 2, [[Nebula]] - [[Hannibal]] <ref>[[https://www.cctchess.com/previous-events/cct-15/cct15-results/|CCT15 Results, Download]]</ref>
[[code]]
[Event "CCT15"]
[Site "Variant-ICS, Amsterdam, NL"]
[Date "2013.02.23"]
[Round "2"]
[White "Nebula"]
[Black "Hannibal"]
[Result "1/2-1/2"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 O-O 8.Bb3 d6 
9.f3 Bd7 10.Qd2 Nxd4 11.Bxd4 b5 12.a4 b4 13.Nd5 Nxd5 14.exd5 Bxd4 15.Qxd4 a5 
16.O-O Qc7 17.Rfe1 Rfe8 18.Re2 Qa7 19.Qxa7 Rxa7 20.Rae1 Kf8 21.g4 Rc7 22.Kf2 
Bc8 23.Re4 Ba6 24.h4 h5 25.gxh5 gxh5 26.Rg1 f6 27.Ke3 Rec8 28.Rg2 Bc4 29.Bxc4 
Rxc4 30.Kd3 R4c5 31.Rd4 Kf7 32.f4 f5 33.Rg5 Rxc2 34.Rxf5+ Kg8 35.Rg5+ Kf8 
36.Rf5+ Ke8 37.Rxh5 R8c5 38.Rh8+ Kd7 39.b3 R2c3+ 40.Ke4 Rxb3 41.Kf5 Rbc3 42.h5 
b3 43.Rd2 R5c4 44.Rb8 Kc7 45.Re8 Rc2 46.Rxe7+ Kb6 47.Rd1 b2 48.Rb1 Rf2 49.Re4 
Rc1 50.Re1 Rc4 51.Re4 Rc1 52.Re1 Rc4 53.Re4 1/2-1/2
[[code]]

=See also=
* [[Various Classifications#Astronomy|Astronomy]]
* [[Dark Horse]]
* [[Orion]]
* [[Search Instability]]
* [[Wizard]]

=Forum Posts=
* [[http://www.talkchess.com/forum/viewtopic.php?t=46208|Nebula 1.0 released]] by [[Dragan Zdravkovic]], [[CCC]], November 30, 2012
* [[http://www.talkchess.com/forum/viewtopic.php?t=46961|Nebula 1.5 released]] by [[Dragan Zdravkovic]], [[CCC]], January 21, 2013
* [[http://www.talkchess.com/forum/viewtopic.php?t=47485|Nebula 2.0 released]] by [[Dragan Zdravkovic]], [[CCC]], March 12, 2013 

=External Links=
==Chess Enginee==
* [[https://sites.google.com/site/nebulachess/|Nebula Chess]]
* [[http://computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&eng=Nebula%202.0%2064-bit%204CPU#Nebula_2_0_64-bit_4CPU|Nebula 2.0 64-bit 4CPU]] in [[CCRL|CCRL 40/40]]
* [[http://www.computerchess.org.uk/ccrl/404FRC/cgi/engine_details.cgi?print=Details&each_game=1&eng=Nebula%202.0%2064-bit#Nebula_2_0_64-bit|Nebula 2.0 64-bit]] in [[CCRL|CCRL 40/4]] FRC
==Misc==
* [[https://en.wikipedia.org/wiki/Nebula|Nebula from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Nebula_%28disambiguation%29|Nebula (disambiguation) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Nebula_%28computing_platform%29|Nebula (computing platform) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Nebulae_%28computer%29|Nebulae (computer) from Wikipedia]]
* [[Videos#McCoyTyner|McCoy Tyner]] - [[https://en.wikipedia.org/wiki/Enlightenment_%28McCoy_Tyner_album%29|Nebula]], [[https://en.wikipedia.org/wiki/Montreux_Jazz_Festival|Montreux Jazz Festival]], July 7, 1973, [[https://en.wikipedia.org/wiki/YouTube|YouTube]] Video 
>  [[Videos#McCoyTyner|McCoy Tyner]], [[https://en.wikipedia.org/wiki/Azar_Lawrence|Azar Lawrence]], [[https://en.wikipedia.org/wiki/Juini_Booth|Juney Booth]],  [[Videos#AlphonseMouzon|Alphonse Mouzon]] 
> [[media type="youtube" key="OMX3EsrkuJM" width="480"]]

=References= 
<references />
=What links here?= 
[[include page="Nebula" component="backlinks" limit="30"]]
**[[Engines|Up one level]]**