See the panel: http://www.cs.unipr.it/~tinderbox/all_trees.panel.html Or the status page: http://www.cs.unipr.it/~tinderbox/PPL-grids/status.html Enjoy, Roberto P.S. The reason it is currently all reds is explained in the message I have just sent to the SWI-Prolog mailing list. -- Prof. Roberto Bagnara Computer Science Group Department of Mathematics, University of Parma, Italy http://www.cs.unipr.it/~bagnara/ mailto:bagnara@cs.unipr.it