diff --git a/qcd_function b/qcd_function
index 2a86b44..7c9ee3a 100644
--- a/qcd_function
+++ b/qcd_function
@@ -157,4 +157,25 @@ function whenfilechanges() {
 
 }
 
-
+function gcd() {
+# guess cd,  find first match in folder
+    local dname
+    local bname
+    local match
+    set -o pipefail
+    dname=$( dirname "$1" )
+    bname=$( basename "$1" )
+    match=$( ls "$dname" | grep "$bname" | head -n 1 )
+    [[ ! "$match" = "" ]] && {
+        echo $match | grep --color=always  "$bname"
+        \cd "$match"
+        return
+    } 
+    match=$( ls "$dname" | grep -i "$bname" | head -n 1 )
+    [[ ! "$match" = "" ]] && {
+        echo $match | grep -i --color=always "$bname"
+        \cd "$match"
+        return
+    } 
+    echo No match. 
+}