Endgame Tablebases Online
6-men endgame analysis free for everyone
|
News
October 25, 2024
11 years after the last update, I thought I should clarify that the project is over and this page is no longer maintained. The project of distributing Nalimov's 6-piece tablebases over the eMule network was successful and has accomplished all its goals. Now both the Nalimov's format and eMule network are no longer widely used. I am keeping this page online purely as a piece of history.
September 27, 2013
Please be sure to verify the downloaded Syzygybases using the following checksums:
These checksums were provided by Joshua Shriver in a single file, I divided them into 4 files for convenience.
Note that md5sum from GnuWin32 Coreutils package computes wrong checksums. You need another build of md5sum, e.g., from Cygwin, or a different checksummer, such as fsum. Simply copy the md5 file into the corresponding Syzygybases directory and run "fsum -c Syzygybases-WDL-3-4-5.md5" (example).
September 14, 2013
Syzygybases is a new promising tablebase format developed by Ronald de Man. The main differences from Nalimov's format:
- Syzygybases take 50 moves rule into account.
- Probing code is distributed under permissive license (Nalimov's probing code can only be used under Nalimov's permission, which is hard to impossible to obtain).
- Syzygybases include WDL (win/draw/loss) tables for fast access during search, as well as separate DTZ (distance to zeroing the 50 move counter) tables for finding the winning line.
- Syzygybase are about 7 times smaller than Nalimov's tablebases (161 GB vs 1.2 TB).
- Generating complete syzygybases for up to 6 pieces takes less than a month on a PC with 16 GB or RAM.
The generator source, probing code source and documentation are available on github: https://github.com/syzygy1/tb. As a proof of concept Ronald incorporated the probing code into Stockfish engine: https://github.com/syzygy1/Stockfish.
A few days ago Joshua Shriver started seeding the complete set of 3-4-5-6-piece Syzygybases on bittorrent (as well as hosting the tracker): http://oics.olympuschess.com/tracker/index.php. Already it looks like downloading might be faster than generating, and it will still get faster as more people join.
Still early days, but this could well become the standard tablebase format for the next decade of computer chess.
(Older news are archived here).
Introduction
Many chess enthusiasts would like to do 6-men endgame analysis, but no one wants to host 1 TB of files for download. So we have to help ourselves. This page is an attempt to organize a persistent online availability of the whole set of Nalimov 6-men tablebases. This project depends solely on chess lovers community, it's up to us to choose if we will download any tablebases for free, or if we will have to buy them on DVD from Chessbase etc..
If you are not sure what endgame tablebases are or how to use them,
you can learn the basics from Wikipedia
or from Aaron Tay's EGTB Guide.
eMule
We use eDonkey and KAD networks, and eMule software for sharing the tablebase files, so if you want to download them you will have to install eMule (or aMule if you use Mac or Linux). If you are new to eMule please take a look at the tutorial, and official help pages. Here you can learn how to set up eMule behind a firewall or router.
Some hints about configuring eMule the best way by our eMule expert Thomas: Thread 1, Thread 2. If you will have any questions or problems, please ask at EGTB forum. Good luck!
Please keep sharing the files after you downloaded them.
3-4-5 men bases
Just in case you don't have them, you should download and install all 3-4-5 men tables before even thinking of using 6-men tables. You can get them from Bob Hyatt, Chesslib Norm Pruitt (also FTP) or Joshua Shriver, but you might as well try using eMule and download them by these links:
- All 3-men bases – ed2k link ⇒ 65 KB ZIP (tbs | md5)
- All 4-men bases – ed2k link ⇒ 30 MB ZIP (tbs | md5)
- 5-men tablebases: 4+1 without pawns – emulecollection ⇒ 0.37 GB in 40 files (tbs | md5)
- 5-men tablebases: 4+1 with pawns – emulecollection ⇒ 1.06 GB in 30 files (tbs | md5)
- 5-men tablebases: 3+2 without pawns – emulecollection ⇒ 1.36 GB in 80 files (tbs | md5)
- 5-men tablebases: 3+2 with pawns – emulecollection ⇒ 4.25 GB in 70 files (tbs | md5)
6-men endgame tablebases
All files in this section are "emulecollections" - simple text files containing one or several ed2k links. Paste those links into your eMule and it will start trying to download the files.
Smileys show 'spread status' of each tablebase:
– Super-shared tablebase – All files have 10 full sources (peers with complete files).
– Well-shared tablebase – At least 3 full sources exist.
– At least one full source exist - a recently shared base, not spread yet.
– Tablebase disappeared from the network. It was available for some while,
but now the original releaser disconnected before anyone else could get the files.
If you have any sets marked with this smiley, please share them online!
– Tablebase was never released yet.
If you notice that some tablebase is spread more, or less, than stated here, please drop me email and I'll update this page.
The download order is completely up to you. A few things that you may consider:
1. It's good to get small bases before trying the big ones.
The best start would be KNNKNN and KBBKBB.
2. It's better to get pawnless bases before getting those with pawns,
to avoid the possible "incomplete tablebase problem".
3. You will have better experience if you start with bases which are already shared by many people
( and ).
4. You may like to download tablebases by "importance" order,
which is based on statistics of occurrance of each ending in real games.
Several such lists exist: by Dieter Bürßner,
Nelson Hernandez,
and Peter Kasinski.
5. You may like to first download tablebases for endgames where longer checkmates are possible.
[ Sorted by piece value: P⇒N⇒B⇒R⇒Q | Sorted by alphabet: B⇒N⇒P⇒Q⇒R ]
4+2 without pawns |
4+2 with pawns |
3+3 without pawns |
3+3 with pawns |
-pdf- Biologia - Neil A. Campbell- Jane B. Reece - 7ma Edicion [repack] Jun 2026
El éxito de este manual radica en su enfoque conceptual. En lugar de presentar la biología como una acumulación de datos aislados, Campbell y Reece estructuraron el contenido alrededor de que conectan desde la escala molecular hasta los ecosistemas globales. Factores clave de su éxito:
Un recorrido cronológico por los dominios de la vida, desde los procariotas hasta los animales.
Explores the fundamental unit of life and its energetic processes .
: Principles of thermodynamics, cellular respiration (harvesting chemical energy), and photosynthesis . El éxito de este manual radica en su enfoque conceptual
| If you want… | Choose… | |--------------|---------| | The classic Campbell experience with his direct input | 7th edition | | The most up-to-date content | 8th+ editions | | A balance of price and quality | 7th edition (widely available used) | | Spanish language edition | Both available, but 7th is more common |
La 7.ª edición de "Biología" de Campbell y Reece es una referencia clásica y robusta para aprender los fundamentos de la biología. Sigue siendo útil como texto base, aunque es recomendable complementarla con lecturas actuales en áreas de rápido avance científico.
If you're a student, I recommend checking with your instructor or university to see if they have a recommended source for accessing the textbook. Explores the fundamental unit of life and its
Jane Reece, Neil Campbell’s longtime collaborator, has participated in every edition of Biology, first as an editor and contributor, then as an author. Her impressive academic background includes an A.B. in Biology from Harvard University, an M.S. in Microbiology from Rutgers University, and a Ph.D. in Bacteriology from UC Berkeley. Before moving to California, she taught biology at Middlesex County College and Queensborough Community College. Her research focused on genetic recombination in bacteria at UC Berkeley and Stanford University.
The textbook is divided into several key sections, including:
represents more than just a textbook; it is a monument to scientific education. Published at the intersection of traditional biology and the genomic revolution, this edition captures a pivotal moment in the history of life sciences while maintaining the clarity, accuracy, and pedagogical excellence that made Campbell’s name synonymous with biology education worldwide. Sigue siendo útil como texto base, aunque es
The inclusion of in the search query tells a specific story. Students are looking for a portable, searchable, and accessible version of this heavy text.
The 7th edition of "Biology" by Campbell and Reece might have references or further reading sections that could guide you to significant papers in the field.
A pesar de que el libro se encuentra ya en su en inglés (2021) y es escrito por un nuevo equipo encabezado por Lisa Urry, la 7ma edición en español conserva un estatus especial. Muchos estudiantes y profesionales la recuerdan como la versión que consolidó el método Campbell en el mundo hispanohablante. Su claridad expositiva, la calidad de sus ilustraciones y su exhaustividad la convierten en una herramienta de consulta invaluable y en un objeto de colección para bibliófilos científicos.