Changes

Syzygy EGTB is significantly smaller than all any [[Endgame Tablebases#DTM|DTM]] EGTBsEGTB. It is 7 times as small as Gaviota for 5 men, 8 times as small as Nalimov for 7 6 men, 8 times as small as Lomonosov for 7 men. However, when all DTM EGTBs have full data of two sides, Syzygy EGTB omits data of one side for DTZ data to save space. [[Ronald de Man]] estimated that if keep them all, the Syzygy's 6 men size may increase 158 GB, become 307 GB in total, double on size, 4 times as small as Nalimov 5 6 men. 

On the first release (Apr 0201, 2013) the generator was ready to generate all endgames up to 6 men. The generation is multithreaded and processed processes completely in RAM. To generate all 6 men, it requires a system with at least 32 GB of RAM and working may run in 5 days (the period was measured with a computer 6-core i3930K @ 4.2Ghz, 64 GB).

Generation Ronald de Man wasn't initially interested in the creation of 7-man tablebases would require about 1 TB of RAM. Generation time will be about 64 x per table, which means around 175 x time total men Syzygy Based <ref>[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=6&t=73967618#p83338 p83771 Re: Syzygy tb generator for windows7-piece syzygy] by [[Ronald de Man|syzygy]], [[Computer Chess Forums|CCRL Discussion Board]], June 01July 03, 2014</ref> since the generation would require about 1 TB of RAM, too expensive at that time. Ronald de Man wasn't initially interested in creation of 7-men Syzygy Based Generation time would be about 64 x per table, which means around 175 x time total <ref>[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=6&t=76187396#p83771 p83338 Re: 7-piece syzygySyzygy tb generator for windows] by [[Ronald de Man|syzygy]], [[Computer Chess Forums|CCRL Discussion Board]], July 03June 01, 2014</ref>.His original generator could not create them. But in 2018, he supported [[Bojun Guo]] in his 5 -month attempt to generated them <ref>[http://www.talkchess.com/forum/viewtopic.php?t=66797 7-men Syzygy attempt] by [[Bojun Guo]], [[CCC]], March 10, 2018</ref>. His hardware was estimated at over US$ 90K. In August of 2018 their creation was completed<ref>[https://syzygy-tables.info/ Powered by Ronald de Man's Syzygy endgame tablebases, 7-piece tables generated by Bojun Guo and a public API hosted by lichess.org], August 19, 2018</ref><ref>[http://tablebase.lichess.ovh/tables/standard/7/ Index of /tables/standard/7/ on lichess], August 19, 2018</ref>.

* Small sizes. It is about 8 times as small as the second-best EGTBs. Having small sizes is the main success key of Syzygy Bases since it helps is much easier to create, store and , provide it much easier , download than other EGTBs

* Hard to integrate with chess engines. [[Ronald de Man]] has not provided probing code as an independent library. Instead, he provided it but as a part of [[Stockfish]] chess engines. The probe code has integrated too deeply with that chess engine code and it requires a lot of effort to de-integrate. All make the reuse of the code for , modify and integrate with other chess engines become hard jobsprojects* Hard to understand and contribute to the project. ETGB itself is a hard topic. Syzygy EGTB has also integrated with many advance advanced techniques/tricks. It is written in old-style C language. All make it become very hard to understand and/or modify to improve or for other purposes* [[Endgame Tablebases#DTZ50|DTZ50]] metric may lead the engines to win in much longer and ugly ways, compared with [[Endgame Tablebases#DTM|DTM]] one 

[[Ronald de Man]] has provided only open source code for generators/probers but not endgame files themselves. Using his tools some people have generated endgames and published them via DVD or some servers such as FTP server of [[Bojun Guo]], [[Lichess]] serveronline.

* [http://www.talkchess.com/forum/viewtopic.php?t=65390 understanding DTZ] by [[Alexandru Mosoi]], [[CCC]], October 06, 2017 » [[Endgame Tablebases#DTZ|DTZ]], [[Syzygy Bases#Fathom|Fathom]]

* [http://www.talkchess.com/forum/viewtopic.php?t=67122 Probing the Syzygy tablebase - beginners question] by [[Andreas Matthies]], [[CCC]], April 16, 2018

* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=70568 7-man Syzygy support in Fathom] by [[Jon Dart]], [[CCC]], April 23, 2019» [[#Fathom|Fathom]]

* [https://www.chessdb.cn/queryc_en/ Chess Cloud Database Query Interface] by [[Bojun Guo|noobpwnftw]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=71764 ChessDBCN] by [[Bojun Guo|noobpwnftw]], [[CCC]], September 09, 2019</ref>

* [[:Category:Michael Brecker|Michael Brecker Band]] - [https://en.wikipedia.org/wiki/Michael_Brecker_(album) Syzygy], August 16[https://www.bjd.sk/archiv-1979-2001#1987 BJD 1987], 1987 at [https://en.wikipedia.org/wiki/Newport_Jazz_Festival Newport Jazz FestivalBratislava Bratislava], [https://en.wikipedia.org/wiki/YouTube YouTube] VideoVideos: [[:Category:Michael Brecker|Michael Brecker]], [[:Category:Mike Stern|Mike Stern]], [https://de-de.facebook.com/JeffAndrewsBassPage/ Jeff Andrews], [https[:Category://en.wikipedia.org/wiki/Adam_Nussbaum Adam Nussbaum|Adam Nussbaum]], [https://en.wikipedia.org/wiki/Joey_Calderazzo Joey Calderazzo]: {{#evu:https://www.youtube.com/watch?v=lgVxFM7cONQcU9aDLOG89o|alignment=left|valignment=top}}: {{#evu:https://www.youtube.com/watch?v=BUcz1YD0Nr8|alignment=left|valignment=top}}