Chess programs or other programs with capable heruristics for calculators

[pier4r]

I have one ti89, that surely is quite capable but first I want to wear off other calcs with programming and math; thus I try to use it as I can in the meantime. Thanks to the ti89 community, the calc has a lot of applications through which one can use the device.
One that let me use the calc from time to time is tichess 4.17e http://tict.ticalc.org/projects.html#ref_latest . Could be that the program is not the best chess entity that could be programmed for the ti89 but most likely is the best chess entity actually implemented on it.

What about other calculators similar (or more capable) to the ti89? Of course all the calc compatible with the ti89 can run lichess as well.

For the 50g (and compatible) I found mostly one program with a serious heuristic: MLchess https://www.hpcalc.org/details/3067
For the prime I got none.
What about the casio calcs? I didn't find any clear information of programs there.

Moreover I was also interested in programs having capable heristics in a search domain that is not trivial (thus other games/problems). Do you have any known example? (if possible with available source code)