diff --git a/TestHNSW/HNSWDemo/Program.cs b/TestHNSW/HNSWDemo/Program.cs
index 009a04b..10a62bf 100644
--- a/TestHNSW/HNSWDemo/Program.cs
+++ b/TestHNSW/HNSWDemo/Program.cs
@@ -95,9 +95,10 @@ namespace HNSWDemo
             return vectors;
         }
 
+
         static void Main(string[] args)
         {
-            FilterTest();
+            AccuracityTest();
             Console.ReadKey();
         }
 
@@ -390,7 +391,7 @@ namespace HNSWDemo
             var miss = 0;
             foreach (var v in vectors)
             {
-                var numbers = map.ConvertIdsToFeatures( world.Search(v, K, context).Select(r=>r.Item1));
+                var numbers = map.ConvertIdsToFeatures(world.Search(v, K, context).Select(r => r.Item1));
                 foreach (var r in numbers)
                 {
                     var record = testDict[r];
@@ -422,7 +423,7 @@ namespace HNSWDemo
             var sw = new Stopwatch();
 
             var test = new VectorsDirectCompare(samples, CosineDistance.ForUnits);
-            var world = new SmallWorld<float[]>(NSWOptions<float[]>.Create(6, 15, 200, 200, CosineDistance.ForUnits, true, true, selectionHeuristic: NeighbourSelectionHeuristic.SelectSimple));
+            var world = new SmallWorld<float[]>(NSWOptions<float[]>.Create(32, 15, 200, 200, CosineDistance.ForUnits, true, true, selectionHeuristic: NeighbourSelectionHeuristic.SelectSimple));
 
             sw.Start();
             var ids = world.AddItems(samples.ToArray());
diff --git a/ZeroLevel.HNSW/Utils/ProbabilityLayerNumberGenerator.cs b/ZeroLevel.HNSW/Utils/ProbabilityLayerNumberGenerator.cs
index 0560f21..2af5225 100644
--- a/ZeroLevel.HNSW/Utils/ProbabilityLayerNumberGenerator.cs
+++ b/ZeroLevel.HNSW/Utils/ProbabilityLayerNumberGenerator.cs
@@ -1,12 +1,16 @@
-namespace ZeroLevel.HNSW.Services
+using System;
+
+namespace ZeroLevel.HNSW.Services
 {
     internal sealed class ProbabilityLayerNumberGenerator
     {
         private const float DIVIDER = 3.361f;
         private readonly float[] _probabilities;
+        private float _mL;
 
         internal ProbabilityLayerNumberGenerator(int maxLayers, int M)
         {
+            _mL = maxLayers;
             _probabilities = new float[maxLayers];
             var probability = 1.0f / DIVIDER;
             for (int i = 0; i < maxLayers; i++)