The javascript engine: https://nanochess.org/chess4.html#sour https://nanochess.org/chess4.html#sour The slightly older C version: https://nanochess.org/chess1

The javascript engine: https://nanochess.org/chess4.html#sour https://nanochess.org/chess4.html#sour The slightly older C version: https://nanochess.org/chess1.html https://nanochess.org/chess1.html The author wrote a book commenting and explaining the C version, it's 170 pages long! https://nanochess.org/chess3.html#book https://nanochess.org/chess3.html#book Edit: MicroMax is a close competitor that also has very good explanations on their website https://home.hccnet.nl/h.g.muller/max-src2.html https://home.hccnet.nl/h.g.muller/max-src2.html .