Chess programs for any HP calculator

[xerxes]

(05-29-2022 04:39 PM)pier4r Wrote:  Could be that chess genius 3 would work too?

Unfortunately not, because it's a 32 bit program that needs at least a 80386. This is also the case with Fritz 3.0 or other stronger programs than Fritz 2.51.
Maybe a very old version of M-Chess is executable, but I see problems with the CGA graphics and the copy protection.