Chess engine: Big Ballz 010922

Big Ballz

This is a free UCI-compatibile chess engine. It is a fork of FatTitz which is a fork of Cfish.

This engine uses a HalfKAv2-2048x2-64-64-1 evaluation network, which contains whopping **4 times** the knowledge of Stockfish 14. It was trained partially on Lc0 data, which gives it a unique positional style, while still preserving the tactical sharpness of Stockfish. 

Changes/Improvements to Fat Titz
- details [changes.md](docs/changes.md)
- nuue net embedded
- search changes
- const added to vars & parameters
- vars moved to innerscope
- compile warnings resolved
- lowplyhistory & other search changes added
- compile info printed at startup
- obfuscated node count/nps fixed
- unused includes removed
- anarchy mode removed
- persistent transposition table removed

Compiling Big Ballz requires a working gcc or clang environment. The [MSYS2](https://www.msys2.org/) environment is recommended for compiling Big Ballz on Windows (see below on how to set up MSYS2).

Be aware that a Big Ballz binary compiled specifically for your machine may not work on other (older) machines. If the binary has to work on multiple machines, set `ARCH` to the architecture that corresponds to the oldest/least capable machine.

By default, Big Ballz uses NNUE in Stockfish's Hybrid mode, where certain positions are evaluated with the old handcrafted evaluation. Other modes are Pure (NNUE only) and Classical (handcrafted evaluation only).

BigBallz 010922 download

github:https://github.com/FireFather/BigBallz/releases/tag/010922

We have stopped posting files on Shortest. Currently, you can find the current links on the DOWNLOAD page. Most of them are placed on Katfile servers. If you do not want to wait long with the download, you can support our work and become a donor. As a thank you, we provide you with a link to the MEGA drive, where you can download the engines and other files without waiting. More information can be found on the DONORS page.