John simplified Von Neumann's algorithm based on the idea of self-replicating robots. He did this by modifying the game of Go over 18 months, playing with five or six people until the rules just felt right. An important part of the game was having "persnickety" participants like Richard to make sure that every piece was put in its proper place. John felt that every key aspect of the Life algorithm was discovered during this period.
Once the Life algorithm was programmed by Richard Guy and his son Michael Guy (John's close friend at Cambridge), most nerds started playing with Life as a computer program. John felt that the computer program turned Life into "a spectator sport", and Richard Guy thought "it went too fast".
So this session was to encourage people to try Life the way John thinks of it... as a manual game. If you are interested in learning to play the Game of Life manually, just write to me for the directions or look around online. This 1970 article about the Game of Life was one of the most popular in Martin Gardner's years of columns for Scientific American.
For more information about John Conway, "the world's most charismatic mathematician", read this fantastic article by his biographer, Siobhan Roberts.