diff --git a/src/GameStrategy.cs b/src/GameStrategy.cs
new file mode 100644
index 0000000..842915d
--- /dev/null
+++ b/src/GameStrategy.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace inf3.src
+{
+    class GameStrategy
+    {
+        // 0 = defect, 1 = cooperate
+
+        int opponentLastMove;
+        bool opDefected = false;
+        int counter = 0;
+
+        public GameStrategy(int opLM)
+        {
+            opponentLastMove = opLM;
+        }
+
+        public int nextMove()
+        {
+            if (opponentLastMove != 0)
+            {
+                return opponentLastMove;
+            }
+            else
+            {
+                opDefected = true;
+                counter++;
+                if (counter < 10)
+                {
+                    return 0;
+                }
+                else
+                {
+                    counter = 0;
+                    opDefected = false;
+                    return 0;
+
+                }
+            }
+        }
+
+    }
+
+}