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All 7 men files' size is over 16.7 TiB, over storages of typical modern computers. They also require a long time to download too. Thus some users choose to download one or a few endgames only, based on their statistics of use in endgames. Bellow is the top 20 of those endgames by their order. The first one, KRPPvKRP, has a significantly higher frequency of use than the others and should be always downloaded:
{| class="wikitable"|-! Rank! Name ! Rank! Name ! Rank! Name ! Rank! Name |-! 1) | style="text-align:right;" | KRPPvKRP ! 6| style="text-align:right;" | KNPPvKNP! 11| style="text-align:right;" | KBPPvKNP! 16| style="text-align:right;" | KRBPPvKR|-! 2) | style="text-align:right;" | KBPPvKBP ! 7| style="text-align:right;" | KNPPvKBP! 12| style="text-align:right;" | KRPPvKRB! 17| style="text-align:right;" | KBPPvKPP|-! 3) | style="text-align:right;" | KPPPvKPP ! 8 | style="text-align:right;" | KRBPvKRP! 13| style="text-align:right;" | KRPPvKPP! 18| style="text-align:right;" | KRPPPvKP|-! 4) | style="text-align:right;" | KRPPPvKR ! 9| style="text-align:right;" | KQPPvKPP! 14| style="text-align:right;" | KBPPvKRP! 19| style="text-align:right;" | KRBPvKRB|-! 5) | style="text-align:right;" | KQPPvKQP 6) KNPPvKNP 7) KNPPvKBP 8) KRBPvKRP 9) KQPPvKPP ! 10) | style="text-align:right;" | KQPPPvKP11) KBPPvKNP 12) KRPPvKRB 13) KRPPvKPP 14) KBPPvKRP ! 15) | style="text-align:right;" | KRNPvKRP 16) KRBPPvKR 17) KBPPvKPP 18) KRPPPvKP 19) KRBPvKRB ! 20) | style="text-align:right;" | KRPPvKRN|}
=Probe Code and Tools=
|-
! 4
| style="text-align:right;" | syzygy4syzygy0
| style="text-align:right;" | -7
| style="text-align:right;" | 2
If the engine needs to know the DTZ value (which is only necessary when a TB root position has been reached), the probing code may have to do a 1-ply search to get to the "right" side of the DTZ table.
For 6-piece TBs, DTZ is 81.9GB when storing only the smaller side of each table. Storing both sides might require perhaps 240GB.
[[Morgan Houppin]] explained why his chess engine [[Stash]] doesn't have Syzygy probe code, March 25, 2021 <ref>[http://talkchess.com/forum3/viewtopic.php?f=2&t=76927#p888045 Re: Stash has lost 2 game because of NO EGTB] by [[Morgan Houppin]], [[CCC]], March 25, 2021</ref> :
Syzygy probing is a hell of a mess, and I don't want to plug two thousand lines of foreign code that I don't understand, nor do I have the motivation to fully understand how Syzygy files are stored, and then write the additional two thousand lines of code to read them for a mere 5 Elo gain at TCEC.
=Endgame News=
* [http://www.talkchess.com/forum/viewtopic.php?t=60312&start=240 Natural TB (take 2)] by [[Marco Costalba]], [[CCC]], August 22, 2017 » [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=65284 Probing tablebases through USB 3.0] by [[Jon Fredrik Åsvang]], [[CCC]], September 25, 2017 » [[Memory#USB3|USB 3.0]]
* [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=65713 Is there now coming changes to syzygy databases?] by [[Jouni Uski]], [[CCC]], November 13, 2017 » [[Endgame Tablebases#DTM|DTM]], [[CFish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66096 How to Download Syzygy Endgame Tablebase Files] by Daniel Johnson, [[CCC]], December 23, 2017
'''2019'''
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=70074 Testing the implementation of Syzygy] by [[Vincent Tang]], [[CCC]], March 02, 2019
* [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]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=71397 Simplest use of syzygy table] by [[Vivien Clauzon]], [[CCC]], July 28, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=71512 SYZYGY question] by [[Robert Hyatt]], [[CCC]], August 11, 2019 » [[Crafty]], [[En passant]]
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=73598 Almost perfect DTM tablebase] by [[Dann Corbit]], [[CCC]], April 08, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74809 Pyrrhic, Fathom for Humanoids] by [[Andrew Grant]], [[CCC]], August 16, 2020» [[#Pyrrhic|Pyrrhic]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75396 EGTB compression] by [[Dann Corbit]], [[CCC]], October 14, 2020 <ref>[https://en.wikipedia.org/wiki/LZ4_(compression_algorithm) LZ4 (compression algorithm) from Wikipedia]</ref> <ref>[https://en.wikipedia.org/wiki/Zstandard Zstandard from Wikipedia]</ref>
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=75487 Syzygy bases ... question to "Syzygy Probe Depth"] by [[Frank Quisinsky]], [[CCC]], October 21, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75906 Fathom and 7-men] by [[Joshua Shriver]], [[CCC]], November 24, 2020 » [[#Fathom|Fathom]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75973 Problem with Syzygy tablebase] by [[Elias Nilsson]], [[CCC]], December 03, 2020
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76010 Can EGTB storage requirements be reduced using this scheme?] by mmt, [[CCC]], December 07, 2020
=External Links=
* [https://en.wikipedia.org/wiki/Syzygy_%28mathematics%29 Syzygy (mathematics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Caledonian_Antisyzygy Caledonian Antisyzygy from Wikipedia]
* [[: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], [[:Category: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}}
=References=
