Index: detour/2_topo.html
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--- detour/2_topo.html	(revision 891)
+++ detour/2_topo.html	(revision 892)
@@ -121,7 +121,9 @@
 
 <div class="img"><center>
 <p><img src="img/topo_tree2.png">
-<p>Figure 2/4. The detour tree of Figure 2/3.
+<p>Figure 2/4. The detour tree of Figure 2/3. Initial state is a., states that
+are acceptable solutions are marked red, further subtrees omited from are
+indicated as "...".
 </center></div>
 
 <p>