Wisdom is knowing how

   little we know -- Socrates

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	Name	Program(s)	Status	Your comments
1	Ed Schröder	Rebel | ProDeo	Original
2	Julien Marcel	Predateur	Original	Numerous ideas taken from books, CCC   forum, Bruce Moreland's website and CPW  wiki.
3	Reinhard Scharnagl	SMIRF	Original	Some ideas might be inspired be reading  chess and AI literature.
4	Lucas Braesch	DiscoCheck	Inspired	Inspirations from: Fruit, Stockfish, Umko.  Details in source code comments.
5	Heiner Marxen	Chest	Original	I did not record where I picked up ideas.  I never picked up (copied) any code.
6	Roberto Munter	Vitruvius	Derivative	Derived from Ippolit series, but in the meantime  I have changed many parts and added other code  and original ideas.
7	Miguel A. Ballicora	Gaviota	Original
8	Dan Honeycutt	Bruja | Cupcake	Original	I document where stuff came from in the   program comments rather than the readme.   I have most of them but I won't swear that I  have them all. Bruja is source on request  and Cupcake is open source so anyone  interested in originality can check for   themselves.
9	Charles Roberson	Telepath  Ares  NoonianChess	Original	The inspiration comes from several books.  AI books: Artificial Intelligence by Patrick Henry  Winston; The Handbook of Artificial Intelligence  by Barr, Figenbaum & Cohen; The Art of Computer  Programming by Knuth; various ICGA publications,  and more.  Numerous conversations with others in the field  including Bob Hyatt, Brian Richardson, James Swafford,  Vincent Diepeveen, Gian-Carlo Pascutto, Shay Bushinsky,  Amir Ban, GM Boris Alterman, Andrew Williams, James  Robertson, Rudolf Huber, Stefan Meyer-Kahlen, GM  Sergey Kudrin and many more.
10	Marcel van Kervinck	Rookie  MSCP	Original	I find it difficult to extract concepts from just  looking at code, which is why I hardly ever do  that. In the meantime, I see nothing wrong with  allowing others to reuse open source game  playing code in tournaments as long as  1. sufficient differentiation is demonstrated, and  2. equal attribution is given to the original authors  (even if modified). Additional permission would not  be needed in case of GPL or BSD-style license.  If such a program wins, then the prize and  recognition should be shared with all contributors.
11	Gerd Isenberg	IsiChess  HansDamf	Original
12	Dan Homan	EXchess	Original	Source code provided with my program under  GPL. Many ideas from many places as described in  readme.txt and in the individual source code files.   Many ideas come from the old rgcc, ccc, chess  programming wiki, etc discussions.... some of  these (usually specific ideas) are documented  in the code, for others (usually common things,  I think) the specific origin of the idea to me is  lost in time (development on-and-off over 15  years).
13	Nicu Ionita	Abulafia	Original	The search is initial inspired from some ideas  from Stockfish. Many ideas from CCC forum and  Chessprogramming Wiki. At code level absolutely  new as it's written in Haskell.
14	Álvaro Begué	Ruy-López	Original	Several ideas collected from the ICGA journal,  and a couple from conversations with other  programmers at WCCC events.
15	Yves Lejeail	Milady	Original	My engine is in VB.net.I started from scratch.  Most of  the algorithms were from Bruce Moreland  (alpha beta, quiescence,...). It take me years to  tune the search in order to have a not too weak  engine, although it is not very strong. LMR and  NullMove seems to work, as well as extensions in  case of checks in the main search, and checks in  the first plies of quiescence. I have not TT, but   some kinds of History Tables which are depth  dependent. I tend to try original ideas but they   usually don't work. I do not record very well the   improvements between versions.
16	Richard Pijl	The Baron	Original
17	Matthew Brades	FruitFly	Derivative	Derived from Fruit 2.1 - but I think this is public  knowledge.
18	Thomas Petzke	iCE	Original	Written 100% from scratch, not using any public  available code. Gaviota EG probing code was  included temporarily to verify the internal node  recognizer.
19	Steve Maughan	Monarch	Original	Monarch is 100% original at the code level.  It really  doesn't have anything special in it.  It's just a basic  vanilla Alpha Beta with all the normal trimmings  (killers, null move etc).
20	Aart Bik	BikJump	Original	Many ideas obviously inspired by the chess literature,  but all code is original (except Nalimov probing code  which is used with permission of Eugene Nalimov  and Andrew Kadatch).
21	Vlad Stamate	Plisk	Original	My inspiration and knowledge came from Talkchess  discussions as well as ChessWiki and open source  chess programs: crafty, stockfish, gnuchess, etc.  I document all the sources of inspiration (no copied  code) in the readme accompanying my engine.
22	Ben-Hur Carlos	RedQueen	Original	Many ideas taken from Stockfish, Sloopy, Robbo  and Gull. The code is completely written by myself  with the exception of MT (random number generator),  Magic Move Generator (By Praddu), some optimized  bitCount and bitScan code snipets.
23	Sune Fischer	Frenzee	Inspired	Frenzee is a rotated bitboard engine. Every single line  of code is handwritten by me there is no copy/paste  from any other source. I feel it is my design, my ideas,  my engine. However, I have over the years looked at  other programs, like Crafty, Beowulf, Phalanx and other  such oldies.    If one were to look at the engine with the same scrutiny  as was the case for Rybka then similarities would no  doubt be detected. The move generator has something  in common with Crafty, since it is a rotated incremental  bitboard engine.    Many of the eval terms are also public knowledge. I  estimate that the original ideas in Frenzee probably  amount to 100-200 points. The rest of its strength  comes from implementing and tuning publicly known  ideas or variations thereof such as PVS, nullmove,  LMR, check extension, hashing and so forth.
24	Richard Allbert	Jabba13032012	Original	Jabba is written in C# - I've used many ideas from  many other OS programs, as well as the CPW and  the Talkchess forum extensively. I use them in the  same way I use for example  www.cplusplus.com/reference/clibrary.  Heaviest influence came from Bruce Moreland's  programming pages, and the comments in the crafty  code documentation.  My motivation is not engine strength - I derive most  pleasure in writing engines from scratch that play a  legal game with a few evaluation terms. See recent  talkchess posts about C# performance!    Having a 2200 engine on FICS playing 1000's of games  is rewarding. My other reason is meeting people involved  - such as at the CPT tournament hosted  by Richard Pijl, or vis the online tournaments.  On my home computer I have many self-written engines  in pure C, C++, Java, C# and VB. This is why I release  with source. Since I began in 2004, I've written many  engine incarnations using Rotated BB, 0x88, Mailbox,  Magic BB.
25	Will Singleton	Amateur	Original
26	Engin Üstün	Tornado	Original	its original from starting on, first using rotated  bitboards, and later changed that with pradu's Magic  Bitboards. Of course some ideas are inspired and took  from other open sources too. own hard worked over  many years ago, never copied any lines from other.  but only the code of nalimov for tablebase access is  included to the source with permission.
27	Jonatan Pettersson	Mediocre	Original	Written from scratch and has open source. A few  instances of code inspired from other people's work  (in particular SEE logic), but in those cases has  mentions of the originators.
28	Bálint Pfliegel	Portfish  WhiskySoda	Derivative	Portfish is the .Net port of Stockfish, so it is means to be  an exact replica of Stockfish on the source level. Technically  it employs solutions which are more natural or has to be  formulated differently under .Net (object broker concept).    WhiskySoda is my original engine, it is heavily inspired by   Stockfish/Portfish and GarboChess. Bitboard operations,  FEN parsing, randoms, polyglot book handling are taken  over from Portfish, search inspired by Garbo. It currently  has a very basic eval, I will definitely use a lot of  inspirations there from literature and other engines if  there will be time to continue.
29	Steve Webber	Raptor	Original
30	Matthias Gemuh	BigLion  ArcBishop80  ChessGUI	Original	I looked at source code TSCP, ExChess, and Crafty  before starting from scratch. Only other code seen  again since then are code snippets in fora.
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