From C. H. PARKER
I was surprised to see that Antony Anderson, in discussing Artificial
Intelligence from A to Z (Review, 18 April), only used two of each in the
classic puzzle: it was always three missionaries and three cannibals in
my youth. The sequence went as follows:
1. M takes 1C over river; 2. M takes 1C over river; 3. M takes 1M over
river, returning with 1C; 4. M takes 1M over river; 5. M takes 1C over river;
6. M takes 1C over river.
C. H. Parker Sherborne, Dorset
