Artic has upgraded its ZX-81 chess games to the Spectrum. There are at present three versions but only one is for the 16K Spectrum. So far as I know it is the only chess program for the 16K machine. Its playing standard is similar to that of ZX Chess Two.
The most interesting of the chess programs from Artic is Voice Chess. It not only plays as well as Spec Chess, the other game in the trio, but each move made is announced by a voice which is generated by the Spectrum loudspeaker.
Some people have asked if the amount of memory used to store the voice affects the quality of the game. So far as I can tell, it does not do so noticeably. Most chess programs occupy a great deal less room than 48K and the voice is just filling the space which is not used. My own feeling is that if you want a game with novelty you should buy Voice Chess but if you just want to buy a good game with no frills, 48K Spec Chess and 16K Micro Chess are choices.