diff --git a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
index 428c08e2..6bbd023f 100644
--- a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
+++ b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
@@ -1,15 +1,13 @@
 package de.dhbwstuttgart.syntaxtree.factory;
 
-import de.dhbwstuttgart.syntaxtree.type.Type;
-import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
-import de.dhbwstuttgart.syntaxtree.type.WildcardType;
 import de.dhbwstuttgart.syntaxtree.type.ExtendsWildcardType;
 import de.dhbwstuttgart.syntaxtree.type.ObjectType;
 import de.dhbwstuttgart.syntaxtree.type.RefType;
 import de.dhbwstuttgart.syntaxtree.type.SuperWildcardType;
+import de.dhbwstuttgart.syntaxtree.type.Type;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
+import de.dhbwstuttgart.syntaxtree.type.WildcardType;
 import de.dhbwstuttgart.typeinference.Menge;
-import de.dhbwstuttgart.typeinference.Pair;
-import de.dhbwstuttgart.typeinference.Pair.PairOperator;
 
 public class UnifyTypeFactory {
 	
diff --git a/src/de/dhbwstuttgart/typeinference/unifynew/RuleSet.java b/src/de/dhbwstuttgart/typeinference/unifynew/RuleSet.java
index fca0e120..cc4c7dbf 100644
--- a/src/de/dhbwstuttgart/typeinference/unifynew/RuleSet.java
+++ b/src/de/dhbwstuttgart/typeinference/unifynew/RuleSet.java
@@ -84,8 +84,34 @@ public class RuleSet implements IRuleSet{
 		else  if(lhsType instanceof ExtendsType)
 			lhsSType = (SimpleType) ((ExtendsType) lhsType).GetExtendedType();
 		else 
+			return Optional.empty();
 		
-		return null;
+		if(lhsSType.getTypeParams().empty())
+			return Optional.empty();
+		
+		Type rhsType = pair.getRhsType();
+		
+		if(!(rhsType instanceof ExtendsType))
+			return Optional.empty();
+		
+		SimpleType rhsSType = (SimpleType) ((ExtendsType) rhsType).GetExtendedType();
+		
+		if(rhsSType.getTypeParams().size() != lhsSType.getTypeParams().size())
+			return Optional.empty();
+		
+		int[] pi = pi(lhsSType, rhsType);
+		
+		if(pi.length == 0)
+			return Optional.empty();
+		
+		Type[] rhsTypeParams = rhsSType.getTypeParams().asArray();
+		Type[] lhsTypeParams = lhsSType.getTypeParams().asArray();
+		Set<MPair> result = new HashSet<>();
+		
+		for(int rhsIdx = 0; rhsIdx < rhsTypeParams.length; rhsIdx++)
+			result.add(new MPair(lhsTypeParams[pi[rhsIdx]], rhsTypeParams[rhsIdx], PairOperator.SMALLERDOTWC));
+		
+		return Optional.of(result);
 	}
 
 	@Override
@@ -116,7 +142,7 @@ public class RuleSet implements IRuleSet{
 		SimpleType lhsSType = (SimpleType) lhsType;
 		SimpleType rhsSType = (SimpleType) rhsType;
 		
-		if(lhsSType.getTypeParams().empty()|| rhsSType.getTypeParams().empty() || lhsSType.getTypeParams().size() != rhsSType.getTypeParams().size())
+		if(lhsSType.getTypeParams().empty() || rhsSType.getTypeParams().empty() || lhsSType.getTypeParams().size() != rhsSType.getTypeParams().size())
 			return Optional.empty();
 		
 		int[] pi = pi(lhsSType, rhsSType);
@@ -129,7 +155,7 @@ public class RuleSet implements IRuleSet{
 		Set<MPair> result = new HashSet<>();
 		
 		for(int rhsIdx = 0; rhsIdx < rhsTypeParams.length; rhsIdx++)
-			result.add(new MPair(lhsTypeParams[pi[rhsIdx]], rhsTypeParams[rhsIdx], PairOperator.SMALLERDOT));
+			result.add(new MPair(lhsTypeParams[pi[rhsIdx]], rhsTypeParams[rhsIdx], PairOperator.SMALLERDOTWC));
 		
 		return Optional.of(result);
 	}
@@ -165,12 +191,13 @@ public class RuleSet implements IRuleSet{
 			rhsSType = (SimpleType) ((SuperType) rhsType).GetSuperedType();
 		else
 			return Optional.empty();
-
-		if(rhsSType.getTypeParams().empty())
+		
+		if(!rhsSType.getName().equals(lhsSType.getName()))
 			return Optional.empty();
 		
-		if(rhsSType.getTypeParams().size() != lhsSType.getTypeParams().size())
-			return Optional.empty();
+		Assert.assertEquals(lhsSType.getTypeParams().size(), rhsSType.getTypeParams().size());
+		//if(rhsSType.getTypeParams().size() != lhsSType.getTypeParams().size())
+		//	return Optional.empty();
 		
 		Set<MPair> result = new HashSet<>();
 		
@@ -261,17 +288,31 @@ public class RuleSet implements IRuleSet{
 	 * @return An array containing the values of pi for every type argument of C or an empty array if the search failed.
 	 */
 	private int[] pi(Type C, Type D) {
-		Type dFromFc = finiteClosure.getType(D.getName());
-		if(dFromFc == null)
+		Type cFromFc = finiteClosure.getType(C.getName());
+		if(cFromFc == null)
 			return new int[0];
 		
-		Set<Type> smallerRhs = finiteClosure.smaller(dFromFc);
-		Optional<Type> opt = smallerRhs.stream().filter(x -> x.getName().equals(C.getName())).findAny();
+		Optional<Type> opt = Optional.empty();
+		if(D instanceof ExtendsType) {
+			SimpleType dSType = (SimpleType) ((ExtendsType) D).GetExtendedType();
+			opt = finiteClosure.grArg(cFromFc).stream()
+					.filter(x -> x instanceof ExtendsType)
+					.filter(x -> ((ExtendsType) x).GetExtendedType().equals(dSType.getName())).findAny();
+		}
+		else if(D instanceof SuperType) {
+			SimpleType dSType = (SimpleType) ((SuperType) D).GetSuperedType();
+			opt = finiteClosure.grArg(cFromFc).stream()
+					.filter(x -> x instanceof SuperType)
+					.filter(x -> ((SuperType) x).GetSuperedType().equals(dSType.getName())).findAny();
+		}
+		else if (D instanceof SimpleType)
+			opt = finiteClosure.greater(cFromFc).stream()
+					.filter(x -> x.getName().equals(D.getName())).findAny();
 		
 		if(!opt.isPresent())
 			return new int[0];
 		
-		Type cFromFc = opt.get();
+		Type dFromFc = opt.get();
 		
 		Assert.assertEquals(cFromFc.getTypeParams().size(), dFromFc.getTypeParams().size());
 		Assert.assertTrue(dFromFc.getTypeParams().size() > 0);
diff --git a/src/de/dhbwstuttgart/typinference/unify/model/ExtendsType.java b/src/de/dhbwstuttgart/typinference/unify/model/ExtendsType.java
index ca7f5c32..7b26ca17 100644
--- a/src/de/dhbwstuttgart/typinference/unify/model/ExtendsType.java
+++ b/src/de/dhbwstuttgart/typinference/unify/model/ExtendsType.java
@@ -1,9 +1,18 @@
 package de.dhbwstuttgart.typinference.unify.model;
 
 public class ExtendsType extends Type {
+	private Type extendedType;
+	
+	public ExtendsType(Type extendedType) {
+		this.extendedType = extendedType;
+	}
 	
 	public Type GetExtendedType() {
-		return null;
-		// TODO
+		return extendedType;
+	}
+	
+	@Override
+	public TypeParams getTypeParams() {
+		return extendedType.getTypeParams();
 	}
 }
diff --git a/src/de/dhbwstuttgart/typinference/unify/model/SuperType.java b/src/de/dhbwstuttgart/typinference/unify/model/SuperType.java
index a5377bb8..a62fd9f3 100644
--- a/src/de/dhbwstuttgart/typinference/unify/model/SuperType.java
+++ b/src/de/dhbwstuttgart/typinference/unify/model/SuperType.java
@@ -16,4 +16,9 @@ public class SuperType extends Type {
 	public String toString() {
 		return "? super " + superedType;
 	}
+	
+	@Override
+	public TypeParams getTypeParams() {
+		return superedType.getTypeParams();
+	}
 }