comparisons bell.k http://inferno.bell-labs.com/cm/cs/who/bwk/interps/pap.html comp.k http://shootout.alioth.debian.org examples cs50.k http://www.cs50.net/psets harvard cs course game.k knight's tour(depth) sudoku(breadth) .. greplin.k http://challenge.greplin.com/ programming challenge