-#!/usr/bin/ruby1.9.1
-# This program filters CSA files. For example, if you want only CSA files
-# played by GPS vs Bonanza,
-# $ ./csa-filter.rb --players gps-l,bonanza some_dir
-# you will see such files under the some_dir directory.
+#!/usr/bin/ruby
+# This program shows statistics of CSA kifu files like following:
+# - Monthly #games and #players
+# - Game results
+# - Time of each move
+# - Time of each game
+# - Moves of each game
+#
+# Sample command line:
+# $ ./statistics.rb /dev/shm/floodgate