diff --git a/lemon/lp_soplex.h b/lemon/lp_soplex.h
--- a/lemon/lp_soplex.h
+++ b/lemon/lp_soplex.h
@@ -43,26 +43,30 @@
   /// developed at the Konrad-Zuse-Zentrum für Informationstechnik
   /// Berlin (ZIB). You can find detailed information about it at the
   /// <tt>http://soplex.zib.de</tt> address.
-  class LpSoplex :virtual public LpSolverBase {
-  protected:
-
-    _lp_bits::RelocateIdHandler relocateIdHandler;
+  class LpSoplex : public LpSolver {
+  private:
 
     soplex::SoPlex* soplex;
-    bool solved;
 
-    std::vector<std::string> colNames;
-    std::map<std::string, int> invColNames;
+    std::vector<std::string> _col_names;
+    std::map<std::string, int> _col_names_ref;
 
-    std::vector<Value> primal_value;
-    std::vector<Value> dual_value;
+    std::vector<std::string> _row_names;
+    std::map<std::string, int> _row_names_ref;
 
+  private:
+
+    // these values cannot be retrieved element by element
+    mutable std::vector<Value> _primal_values;
+    mutable std::vector<Value> _dual_values;
+
+    mutable std::vector<Value> _primal_ray;
+    mutable std::vector<Value> _dual_ray;
+
+    void _clear_temporals();
 
   public:
 
-    typedef LpSolverBase Parent;
-
-
     /// \e
     LpSoplex();
     /// \e
@@ -72,48 +76,75 @@
 
   protected:
 
-    virtual LpSolverBase* _newLp();
-    virtual LpSolverBase* _copyLp();
+    virtual LpSoplex* _newSolver() const;
+    virtual LpSoplex* _cloneSolver() const;
+
+    virtual const char* _solverName() const;
 
     virtual int _addCol();
     virtual int _addRow();
+
     virtual void _eraseCol(int i);
     virtual void _eraseRow(int i);
-    virtual void _getColName(int col, std::string & name) const;
-    virtual void _setColName(int col, const std::string & name);
+
+    virtual void _eraseColId(int i);
+    virtual void _eraseRowId(int i);
+
+    virtual void _getColName(int col, std::string& name) const;
+    virtual void _setColName(int col, const std::string& name);
     virtual int _colByName(const std::string& name) const;
-    virtual void _setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e);
-    virtual void _getRowCoeffs(int i, RowIterator b) const;
-    virtual void _setColCoeffs(int i, ConstColIterator b, ConstColIterator e);
-    virtual void _getColCoeffs(int i, ColIterator b) const;
+
+    virtual void _getRowName(int row, std::string& name) const;
+    virtual void _setRowName(int row, const std::string& name);
+    virtual int _rowByName(const std::string& name) const;
+
+    virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
+    virtual void _getRowCoeffs(int i, InsertIterator b) const;
+
+    virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
+    virtual void _getColCoeffs(int i, InsertIterator b) const;
+
     virtual void _setCoeff(int row, int col, Value value);
     virtual Value _getCoeff(int row, int col) const;
+
     virtual void _setColLowerBound(int i, Value value);
     virtual Value _getColLowerBound(int i) const;
     virtual void _setColUpperBound(int i, Value value);
     virtual Value _getColUpperBound(int i) const;
-    virtual void _setRowBounds(int i, Value lower, Value upper);
-    virtual void _getRowBounds(int i, Value &lower, Value &upper) const;
+
+    virtual void _setRowLowerBound(int i, Value value);
+    virtual Value _getRowLowerBound(int i) const;
+    virtual void _setRowUpperBound(int i, Value value);
+    virtual Value _getRowUpperBound(int i) const;
+
+    virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
+    virtual void _getObjCoeffs(InsertIterator b) const;
+
     virtual void _setObjCoeff(int i, Value obj_coef);
     virtual Value _getObjCoeff(int i) const;
-    virtual void _clearObj();
+
+    virtual void _setSense(Sense sense);
+    virtual Sense _getSense() const;
 
     virtual SolveExitStatus _solve();
     virtual Value _getPrimal(int i) const;
     virtual Value _getDual(int i) const;
+
     virtual Value _getPrimalValue() const;
-    virtual bool _isBasicCol(int i) const;
 
-    virtual SolutionStatus _getPrimalStatus() const;
-    virtual SolutionStatus _getDualStatus() const;
-    virtual ProblemTypes _getProblemType() const;
+    virtual Value _getPrimalRay(int i) const;
+    virtual Value _getDualRay(int i) const;
 
+    virtual VarStatus _getColStatus(int i) const;
+    virtual VarStatus _getRowStatus(int i) const;
 
-    virtual void _setMax();
-    virtual void _setMin();
-    virtual bool _isMax() const;
+    virtual ProblemType _getPrimalType() const;
+    virtual ProblemType _getDualType() const;
+
+    virtual void _clear();
 
   };
+
 } //END OF NAMESPACE LEMON
 
 #endif //LEMON_LP_SOPLEX_H