diff --git a/samples/map_hard b/samples/map_hard
new file mode 100644
index 0000000..6f6a1e5
--- /dev/null
+++ b/samples/map_hard
@@ -0,0 +1,99 @@
+...#
+...#
+..##
+....
+
+#...
+###.
+....
+....
+
+.#..
+.#..
+##..
+....
+
+...#
+...#
+..##
+....
+
+...#
+...#
+..##
+....
+
+#...
+###.
+....
+....
+
+.#..
+.#..
+##..
+....
+
+...#
+...#
+..##
+....
+
+...#
+...#
+..##
+....
+
+#...
+###.
+....
+....
+
+.#..
+.#..
+##..
+....
+
+...#
+...#
+..##
+....
+
+...#
+...#
+..##
+....
+
+#...
+###.
+....
+....
+
+.#..
+.#..
+##..
+....
+
+...#
+...#
+..##
+....
+
+...#
+...#
+..##
+....
+
+#...
+###.
+....
+....
+
+.#..
+.#..
+##..
+....
+
+...#
+...#
+..##
+....