MasterGo

MasterGo© is two things. It is a large and growing database of
professional go games. It is a high speed search engine designed
exclusively to search for go patterns.

The unique marriage of these
allows a new and powerful way to find and study joseki and fuseki.
Main features:
-control the size of the search area with the distance slider
-continue a search by color
-continue a search using both colors (sum button)
-import games
-save and load game collections
-export and print games