Second Appendix CHESS 4.5 and CHESS 4.6: Competition in 1977 and 1978
Early in 1976, there were very few knowledgeable individuals who would have wagered that a computer chess program could hold it own against a strong human player (USCF rating above 2000). Slate and Atkin, in particular, estimated the strength of their program at this time to be about 1800 on the USCF scale. Although it is no small achievement to develop a program which can play at this level, a rating of 1800 is not particularly impressive in world-class chess. This level of skill is clearly inconsistent with the claim that a machine will soon be the world champion.
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