Since you’re here...

... we have a small favour to ask. More people, like you, are reading and supporting our blog: "Chess Engines Diary". And unlike many other sites and blogs, we made the choice to keep our articles open for all, regardless of where they live or what they can afford to pay.

We hope you will consider supporting us today. We need your support to continue to exist, because good entries are more and more work time. Every reader contribution, however big or small, is so valuable. Support "Chess Engines Diary" even a small amount– and it only takes a minute. Thank you.

============================== My email: jotes@go2.pl



Student Opening Book (bin)

 


Depth 100
Best Book Move: OFF

Book - BIN format ( Used by chess GUIs Arena and Droidfish)
Binary books have some important advantages, especially for computer chess engines: space-efficient, fast on accessing and searching, more useful information. 
At the most simple form, they are just a conversion of above text-opening books into binary, in the ready form for software and save text-binary converting steps. However, the major number of top books is built and worked with hash values from transpositions. Often each position is stored as a hash value (8 bytes) and some extra information such as the number of times occurred, number of games won by white/black / drawn with this position, average/maximum Elo of players playing to this opening position, chess program's success with the position. To save space those extra information typically about 2-8 bytes. For example, PolyGlot uses 16 bytes for each item, including hash, move, weight, learning values. Items of a book should be sorted by their hash. 
So when a chess program has to decide on a move, it will look up (by using binary-search) using the hash value of the current position to collect all information come with that hash value and then make a decision upon it.
To build and/or edit those opening books, users need to use special software. (source)

Student Opening Book (bin) download


These and other books are also available on the "download" page of our blog. Check HERE



Comments

Popular posts from this blog

New chess engine: HypnoS 190324 (derived from Stockfish)

New version chess engine: Lc0 BT4

SF-PRO 23.02.2024 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.03.01)

INCOGNITO 7 and Killfish 130324 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.03.15)

SF-PRO 08.03.2024 wins New Engines Test, 09-10.03.2024

Chess engine: SF 16.1 MPV

Chess Engines Diary Rating (Stockfish and clones) - 03.03.2024