A port of World's smallest chess program to JavaScript
Original program is not about playing strength, it's about squeezing every single byte possible to come up with the smallest binary executable that can play chess. I recommend looking at initial 268 bytes source code written in Z80 assembly to get an idea what a masterpiece this program is. When I saw the code I instantly fell in love with piece encoding because this is something unique that has never been done in such an elegant way before. Since not many people, including myself, are familiar with Z80 good enough to write some programs in it I thought it would be a good idea to port the program into a somewhat high-level language. Since the program does not rely on recursion execution speed is not a problem, so I decided to choose javascript for the biggest coverage. You may enjoy the program just right in your browser.
http://borialabs.free.nf/chesskelet/
Special thanks to Alex Garcia, the author of the original project, for helping me with this port!
Enter moves from keyboard, e.g. "e2e4"
User input exactly mimics original program.
https://maksimkorzh.github.io/chesskelet-js/chesskelet.html
Most quirks come with so called 1.5 ply search, it would move a pawn away if under attack even if exposing king to check. It may also leave king in check to avoid loosing material.