Update October 2015
Having just acquired a second Intellect-02 (photo above right, with the white keys) here is some additional information. This second machine was originally sold in May 1993. It is serial number 7542, apparently manufactured in November 1991. It came with Chess cartridge 7554 also dated November 1991 and Kalak cartridge 4576 dated December 1990. Most of the differences between the two Intellect-02s are minor and cosmetic. However the later chess cartridge is a different and stronger program. Firstly it has four levels not three, now set using key YN. The program accepts normal castling input rather than going through the Chess Challenger 3 double move process (the double move key BN is now used for white/black in set up mode) and the NN key is used for position verification and set-up. The program also has a small opening book, so responds immediately to e2-e4 etc. or plays from the opening book as white. The 4 level program plays slowly on level 2 but can give a reasonable game to a hobby player on that level. So it’s a different proposition to the weak 3-level CC3 cartridge.
It is possible that this program is a development of the Intellect program by Y. Kubinov which was entered in the First Soviet Computer-Chess Championship which took place in Ulan-Ude in June 1988. The program was said to be written in assembly, performed an alpha-beta search of 20 positions per second, running on a ‘special’ processor at 2 MHz. Intellect got two draws from five games and finished last of six. Following these Championships the Soviet Computer-Chess Federation was set up to support computer chess and chess programming, to organize computer chess tournaments and to establish a cooperative for producing chess computers.