3D SCACCHI looks and feels like Mychess II. Certainly the game must have been copied from Mychess II. The 3d Chess Board is hard to use therefore it is simpler to enter the moves into the options screen and manually play the game on a chess board.
The test game below shows that the program is at least as strong as the Mychess II tape version. It is hard to say if the program has been modified without further tests.
Playing this game on an an Emulator, you need to be in the Options Screen. You can switch between the Options Screen and 3D Chess Board by using the F1 Function key on your computer. The TAB key simulates the CONTROL key on a Commodore 65/128, therefore you need to have this key pressed down while pressing any other option key. For example to change levels you hold down the TAB key and press the letter L. You can then change the Play Level by pressing an appropriate number key.
It is hard to understand why Vladimir Grigorev is shown as the possible chess engine programmer when most likely the program originates from David Kittinger. Unless, of course the program has been changed or modified. Only more games and tests will clarify this.
In any case, the program plays a good game of chess and you should have fun playing against it. Estimated rating is approximately 1700-1800 ELO (1900-2000 USCF).