diff --git a/TODO b/TODO
index c2a9ab3b..2fc0601b 100644
--- a/TODO
+++ b/TODO
@@ -32,7 +32,7 @@ Tier 1:
     - lattice.scm
     - matrix.scm
     - mazefun.scm
-    - maze.scm - There is a problem reading the input file
+    - maze.scm - vector-ref invalid index -6
     - mbrot.scm
     - mbrotZ.scm - No complex library
     - mperm.scm
diff --git a/docs/images/bench-gabriel.png b/docs/images/bench-gabriel.png
new file mode 100644
index 00000000..a0f1b0b4
Binary files /dev/null and b/docs/images/bench-gabriel.png differ