diff --git a/src/lib/iter-chain-search.hpp b/src/lib/iter-chain-search.hpp
index 353f73c86..e40b8e3a8 100644
--- a/src/lib/iter-chain-search.hpp
+++ b/src/lib/iter-chain-search.hpp
@@ -77,16 +77,21 @@ namespace iter {
     }
     
     /**
-     * @internal implementation for....
+     * @internal helper to rebind on inferred types.
+     * @remark we use the TreeExplorer framework to assemble the processing pipeline
+     *         from suitable building blocks configured with some lambdas. However, we
+     *         also want to _inherit_ from this filter pipeline, so to expose the typical
+     *         iterator operations without much ado. Thus we use some (static) helper function
+     *         templates, instantiate them with the actual source data iterator and pick up
+     *         the inferred type.
      */
     template<class SRC>
-    class _IterChainSetup
+    struct _IterChainSetup
       {
         using Filter = decltype( buildSearchFilter (std::declval<SRC>()) );
         
         using StepFunctor = typename iter_explorer::_BoundFunctor<Filter(Filter const&), Filter>::Functor;
         
-      public:
         using Pipeline = decltype( buildExplorer (std::declval<SRC>(), std::declval<StepFunctor>()) );
       };
     
@@ -108,40 +113,25 @@ namespace iter {
   class IterChainSearch
     : public _IterChainSetup<SRC>::Pipeline
     {
-      using _Base = typename _IterChainSetup<SRC>::Pipeline;
-//      using _Parent = IterStateWrapper<typename _Core::value_type, _Core>;
+      using _Trait = _IterChainSetup<SRC>;
+      using _Base  = typename _Trait::Pipeline;
+      
+      using Filter = typename _Trait::Filter;
+      using Step   = typename _Trait::StepFunctor;
       
     public:
       using DebugPipeline = _Base;
-//    IterChainSearch()                                   =default;
-//    IterChainSearch (IterChainSearch&&)                 =default;
-//    IterChainSearch (IterChainSearch const&)            =default;
-//    IterChainSearch& operator= (IterChainSearch&&)      =default;
-//    IterChainSearch& operator= (IterChainSearch const&) =default;
       
+      using _Base::_Base;
       
-//    template<class CON>
-//    explicit
-//    IterChainSearch (CON& container)
-////    : _Parent(_Core(container.begin(), container.end()))
-//      { }
-//    
-//    IterChainSearch (IT&& begin, IT&& end)
-////    : _Parent(_Core(std::forward<IT>(begin), std::forward<IT>(end)))
-//      { }
+      template<class SEQ>
+      explicit
+      IterChainSearch (SEQ&& srcData)
+        : _Base{move (buildExplorer (forward<SEQ> (srcData)
+                                    ,Step{[this](Filter const& curr){ return configureFilterChain(curr); }}))}
+        { }
       
       
-      operator bool()  const
-        {
-          UNIMPLEMENTED ("solution test");
-        }
-      
-      bool
-      empty()  const
-        {
-          return not(*this);
-        }
-      
       
       /** */
       IterChainSearch&&
@@ -158,21 +148,13 @@ namespace iter {
           return move(*this);
         }
       
-      
-      /////////////////////////TODO dummy placeholder code. Replace by real iterator access
-      string&
-      operator*()  const
+    private:
+      Filter
+      configureFilterChain (Filter const& currentFilterState)
         {
-          static string boo{"bääääh"};
-          return boo;
+          uint depth = this->depth();
+          return Filter{}; /////TODO empty filter means recursion end
         }
-      
-      IterChainSearch&
-      operator++()
-        {
-          return *this;
-        }
-      /////////////////////////TODO dummy placeholder code. Replace by real iterator access
     };
   
   
@@ -192,11 +174,7 @@ namespace iter {
   inline auto
   chainSearch (SRC&& srcData)
   {
-//  using SrcIter = typename _DecoratorTraits<IT>::SrcIter;
-//  using Base = iter_explorer::BaseAdapter<SrcIter>;
-    
-    return IterChainSearch<SRC>();
-//  return TreeExplorer<Base> (std::forward<IT> (srcSeq));
+    return IterChainSearch<SRC>{forward<SRC> (srcData)};
   }
   
   
diff --git a/tests/library/iter-chain-search-test.cpp b/tests/library/iter-chain-search-test.cpp
index eb6f82f11..d7ff544a3 100644
--- a/tests/library/iter-chain-search-test.cpp
+++ b/tests/library/iter-chain-search-test.cpp
@@ -116,6 +116,9 @@ namespace test{
           SHOW_TYPE (Searcher::pointer);
           
 //        TypeDebugger<Searcher::reference> guggi;   // --> std::__cxx11::basic_string<char> const&
+          cout << "search[0]=" <<*search<<endl;
+          ++search;
+          cout << "search[1]=" <<*search<<endl;
 ///////////////////////////////////////////////////TODO WIP
           CHECK (search);
           CHECK (not isnil(search));
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index a83f43e26..e7dd2ac54 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -31215,7 +31215,8 @@
 <icon BUILTIN="flag-yellow"/>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536018862802" ID="ID_1044555993" MODIFIED="1536018873126" TEXT="abgeleiteten Frame konstruieren">
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536018862802" ID="ID_1044555993" MODIFIED="1536281910775" TEXT="abgeleiteten Frame konstruieren">
+<linktarget COLOR="#65a7b1" DESTINATION="ID_1044555993" ENDARROW="Default" ENDINCLINATION="200;225;" ID="Arrow_ID_575633930" SOURCE="ID_1532889609" STARTARROW="None" STARTINCLINATION="158;0;"/>
 <icon BUILTIN="flag-yellow"/>
 </node>
 </node>
@@ -31288,7 +31289,7 @@
 </node>
 <node CREATED="1536185340920" ID="ID_1706168706" MODIFIED="1536185362297" TEXT="also: konstruiere Pipeline mit Filter"/>
 <node CREATED="1536185364045" ID="ID_301562283" MODIFIED="1536185381295" TEXT="dann: Filter -&gt; Filter als Funktor vorgeben"/>
-<node COLOR="#338800" CREATED="1536194368432" ID="ID_665607293" MODIFIED="1536273432151" TEXT="kniffelig in der Praxis">
+<node COLOR="#338800" CREATED="1536194368432" FOLDED="true" ID="ID_665607293" MODIFIED="1536274950954" TEXT="kniffelig in der Praxis">
 <icon BUILTIN="smiley-angry"/>
 <node CREATED="1536194407802" ID="ID_752443094" MODIFIED="1536194421332" TEXT="der &quot;Filter&quot;-Typ ist in einen TreeExplorer gewrappt"/>
 <node CREATED="1536194422544" ID="ID_1594827200" MODIFIED="1536194440618" TEXT="konkret ist der Quell-Typ aber nur ein IterableDecorator"/>
@@ -31429,19 +31430,20 @@
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536018923378" ID="ID_1163666446" MODIFIED="1536018929138" TEXT="Pipeline konstruieren">
 <icon BUILTIN="flag-yellow"/>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536018931433" ID="ID_1532889609" MODIFIED="1536018943472" TEXT="treeExplorer-Konfiguration">
-<icon BUILTIN="flag-yellow"/>
-</node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536115788134" ID="ID_1444917457" MODIFIED="1536121333262" TEXT="Problem: Basis-Typ inferieren">
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536018931433" ID="ID_1532889609" MODIFIED="1536281924138" TEXT="treeExplorer-Konfiguration">
+<arrowlink COLOR="#65a7b1" DESTINATION="ID_1044555993" ENDARROW="Default" ENDINCLINATION="200;225;" ID="Arrow_ID_575633930" STARTARROW="None" STARTINCLINATION="158;0;"/>
 <icon BUILTIN="pencil"/>
+</node>
+<node COLOR="#338800" CREATED="1536115788134" ID="ID_1444917457" MODIFIED="1536281847097" TEXT="Problem: Basis-Typ inferieren">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1536115842002" ID="ID_1601482334" MODIFIED="1536121336222" TEXT="resultiert aus treeExplorer-Aufruf">
 <icon BUILTIN="button_ok"/>
 </node>
 <node COLOR="#338800" CREATED="1536121365113" ID="ID_1114285918" MODIFIED="1536121373905" TEXT="const STL container unterst&#xfc;tzen">
 <icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1536115852336" ID="ID_1044191557" MODIFIED="1536115863616" TEXT="mu&#xdf; aber geeignete Funktoren binden">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1536115852336" ID="ID_1044191557" MODIFIED="1536281849860" TEXT="mu&#xdf; aber geeignete Funktoren binden">
+<icon BUILTIN="button_ok"/>
 </node>
 </node>
 </node>