diff --git a/docs/rbdelete.txt b/docs/rbdelete.txt
index 0c1eb6f..21b7a59 100644
--- a/docs/rbdelete.txt
+++ b/docs/rbdelete.txt
@@ -93,15 +93,48 @@ where 6 subcases could be distinguished.
 Wikipedia says we begin with replacing B(3) which one if its childs, in my
 case this means, setting r(8)->left to NULL....
 
+                                B(11)
+                  
+                    R(8)                         R(13)
+
+             B(N)         B(9)            B(12)           B(16)
+
+                        B(N)  R(10)      B(N) B(N)       B(N)  B(N)
+
+                            B(N) B(N)
+
 So, what is called in on Wikipedia is simply a nullpointer for me...hopefully
 I don't have to do anything with it.
 
 Get an overview over our variables now:
 
-  N : Nullpointer set in R(8)->left
+  N : Nullpointer set in R(8)->left (thus N will be black by definition, ever)
   P : R(8)
   S : B(9)
   Sl: Nullpointer
   Sr: R(10)
 
+we have case 2 described in Wikipedia (reverse colors of P and S)
+
+                                B(11)
+                  
+                    R(8)                         R(13)
+
+             B(N)         B(9)            B(12)           B(16)
+
+                        B(N)  R(10)      B(N) B(N)       B(N)  B(N)
+
+                            B(N) B(N)
+
+still case 2 rotate left on P
+
+                                B(11)
+                  
+                    B(9)                         R(13)
+
+             B(8)         R(10)           B(12)           B(16)
+
+           B(N) B(N)    B(N)  B(N)      B(N) B(N)       B(N)  B(N)
+
+
 # vim: set et ts=4: