four knights problem

Terms from Artificial Intelligence: humans at the heart of algorithms

The glossary is being gradually proof checked, but currently has many typos and misspellings.

The four knights problem places a knight on each corner of a 3x3 miniature chess board. the challenge is to move the knights in the minimum number of moves so that each ends up in the next square clockwise.

Used in Chap. 2: page 12

Four knights: how many moves?