diff --git a/examples/board_hard_3.txt b/examples/board_hard_3.txt
new file mode 100644
index 0000000..dd34d3f
--- /dev/null
+++ b/examples/board_hard_3.txt
@@ -0,0 +1,9 @@
+       8 
+  625  71
+8 57     
+       26
+   345   
+98       
+     25 3
+65  341  
+ 1