A Selective Macro-learning Algorithm and its Application to the NxN Sliding-Tile Puzzle.

Lev Finkelstein Shaul Markovitch A Selective Macro-learning Algorithm and its Application to the NxN Sliding-Tile Puzzle. 223-263 1998 8 J. Artif. Intell. Res. (JAIR) http://www.cs.washington.edu/research/jair/abstracts/finkelstein98a.html db/journals/jair/jair8.html#FinkelsteinM98