diff --git a/src/Advanced.Algorithms/Geometry/BentleyOttmann.cs b/src/Advanced.Algorithms/Geometry/BentleyOttmann.cs
index ed6b2cfd..6e68152e 100644
--- a/src/Advanced.Algorithms/Geometry/BentleyOttmann.cs
+++ b/src/Advanced.Algorithms/Geometry/BentleyOttmann.cs
@@ -12,7 +12,7 @@ public class BentleyOttmann
     {
         private readonly PointComparer pointComparer;
 
-        private HashSet<Event> verticalHorizontalLines;
+        private HashSet<Event> verticalAndHorizontalLines;
         private HashSet<Event> otherLines;
 
         private BHeap<Event> eventQueue;
@@ -41,7 +41,7 @@ private void initialize(IEnumerable<Line> lineSegments)
             currentlyTrackedLines = new RedBlackTree<Event>(true, pointComparer);
             intersectionEvents = new Dictionary<Point, HashSet<Tuple<Event, Event>>>(pointComparer);
 
-            verticalHorizontalLines = new HashSet<Event>();
+            verticalAndHorizontalLines = new HashSet<Event>();
             otherLines = new HashSet<Event>();
 
             rightLeftEventLookUp = lineSegments
@@ -82,9 +82,9 @@ public Dictionary<Point, List<Line>> FindIntersections(IEnumerable<Line> lineSeg
                     case EventType.Start:
 
                         //special case
-                        if (verticalHorizontalLines.Count > 0)
+                        if (verticalAndHorizontalLines.Count > 0)
                         {
-                            foreach (var line in verticalHorizontalLines)
+                            foreach (var line in verticalAndHorizontalLines)
                             {
                                 var intersection = findIntersection(currentEvent, line);
                                 recordIntersection(currentEvent, line, intersection);
@@ -94,7 +94,7 @@ public Dictionary<Point, List<Line>> FindIntersections(IEnumerable<Line> lineSeg
                         //special case
                         if (currentEvent.Segment.IsVertical || currentEvent.Segment.IsHorizontal)
                         {
-                            verticalHorizontalLines.Add(currentEvent);
+                            verticalAndHorizontalLines.Add(currentEvent);
 
                             foreach (var line in otherLines)
                             {
@@ -129,7 +129,7 @@ public Dictionary<Point, List<Line>> FindIntersections(IEnumerable<Line> lineSeg
                         //special case
                         if (currentEvent.Segment.IsVertical || currentEvent.Segment.IsHorizontal)
                         {
-                            verticalHorizontalLines.Remove(currentEvent);
+                            verticalAndHorizontalLines.Remove(currentEvent);
                             break;
                         }
 
diff --git a/src/Advanced.Algorithms/Graph/Coloring/MColorer.cs b/src/Advanced.Algorithms/Graph/Coloring/MColorer.cs
index fb50a299..975a6ddb 100644
--- a/src/Advanced.Algorithms/Graph/Coloring/MColorer.cs
+++ b/src/Advanced.Algorithms/Graph/Coloring/MColorer.cs
@@ -14,21 +14,32 @@ public class MColorer<T, C>
         /// </summary>
         public MColorResult<T, C> Color(IGraph<T> graph, C[] colors)
         {
+            var totalProgress = new Dictionary<IGraphVertex<T>, C>();
 
-            var first = graph.ReferenceVertex;
-
-            var progress = canColor(first, colors,
-                new Dictionary<IGraphVertex<T>, C>(),
-                new HashSet<IGraphVertex<T>>());
+            foreach (var vertex in graph.VerticesAsEnumberable)
+            {
+                var progress = canColor(vertex, colors,
+                    new Dictionary<IGraphVertex<T>, C>(),
+                    new HashSet<IGraphVertex<T>>());
+                
+                foreach(var item in progress)
+                {
+                    if (!totalProgress.ContainsKey(item.Key))
+                    {
+                        totalProgress.Add(item.Key, item.Value);
+                    }
+                }
+               
+            }
 
-            if (progress.Count != graph.VerticesCount)
+            if (totalProgress.Count != graph.VerticesCount)
             {
                 return new MColorResult<T, C>(false, null);
             }
 
             var result = new Dictionary<C, List<T>>();
 
-            foreach (var vertex in progress)
+            foreach (var vertex in totalProgress)
             {
                 if (!result.ContainsKey(vertex.Value))
                 {
diff --git a/tests/Advanced.Algorithms.Tests/Graph/Matching/BiPartiteMatching_Tests.cs b/tests/Advanced.Algorithms.Tests/Graph/Matching/BiPartiteMatching_Tests.cs
index acdcc493..c126ad33 100644
--- a/tests/Advanced.Algorithms.Tests/Graph/Matching/BiPartiteMatching_Tests.cs
+++ b/tests/Advanced.Algorithms.Tests/Graph/Matching/BiPartiteMatching_Tests.cs
@@ -42,6 +42,31 @@ public void MaxBiPartiteMatch_AdjacencyListGraph_Smoke_Test()
             Assert.AreEqual(result.Count, 4);
         }
 
+        /// <summary>
+        /// Test Max BiParitite Edges using Ford-Fukerson algorithm
+        /// </summary>
+        [TestMethod]
+        public void MaxBiPartiteMatch_AdjacencyListGraph_Accuracy_Test_1()
+        {
+            var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyList.Graph<char>();
+
+            graph.AddVertex('0');
+            graph.AddVertex('1');
+            graph.AddVertex('2');
+            graph.AddVertex('3');
+
+
+            graph.AddEdge('0', '2');
+            graph.AddEdge('1', '3');
+          
+
+            var algorithm = new BiPartiteMatching<char>(new BiPartiteMatchOperators());
+
+            var result = algorithm.GetMaxBiPartiteMatching(graph);
+
+            Assert.AreEqual(result.Count, 2);
+        }
+
         [TestMethod]
         public void MaxBiPartiteMatch_AdjacencyMatrixGraph_Smoke_Test()
         {
@@ -74,6 +99,31 @@ public void MaxBiPartiteMatch_AdjacencyMatrixGraph_Smoke_Test()
 
             Assert.AreEqual(result.Count, 4);
         }
+
+        /// <summary>
+        /// Test Max BiParitite Edges using Ford-Fukerson algorithm
+        /// </summary>
+        [TestMethod]
+        public void MaxBiPartiteMatch_AdjacencyMatrixGraph_Accuracy_Test_1()
+        {
+            var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyMatrix.Graph<char>();
+
+            graph.AddVertex('0');
+            graph.AddVertex('1');
+            graph.AddVertex('2');
+            graph.AddVertex('3');
+
+
+            graph.AddEdge('0', '2');
+            graph.AddEdge('1', '3');
+
+
+            var algorithm = new BiPartiteMatching<char>(new BiPartiteMatchOperators());
+
+            var result = algorithm.GetMaxBiPartiteMatching(graph);
+
+            Assert.AreEqual(result.Count, 2);
+        }
         /// <summary>
         /// operators for generics
         /// implemented for int type for edge weights