[This note was motivated by a student's question on searching.]

You should be very comfortable with the search algorithms described in 
pseudocode
in the handout.  You should be comfortable with the Prolog code (by Y. Shoham)
used in
class last Wednesday.  This code is now linked to the course web site (main
page, "Programs").  The
related PowerPoint presentation is also linked to the course web site (syllabus
page, "Ch.12 [B] and Ch.2 [Shoham]").
You should read carefully the two chapters on 
search in Russell and Norvig's book (i.e., chapters 3 and 4)
and understand their contents. You should also read carefully the search
chapter (Chapter 12) in Bratko's book.