Added a second example, demonstrating a board that currently can't be solved by the...

diff --git a/example2.txt b/example2.txt
new file mode 100644 (file)
index 0000000..33a1ae9
--- /dev/null
+++ b/example2.txt
@@ -0,0 +1,10 @@
+-198--236
+826-13--9
+35-926-18
+931682--7
+685-3-192
+--2591863
+1-326-98-
+2681-937-
+59-3-8621
+