diff --git a/src/eva2/server/go/problems/I1Problem.java b/src/eva2/server/go/problems/I1Problem.java
new file mode 100644
index 00000000..ba160604
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+++ b/src/eva2/server/go/problems/I1Problem.java
@@ -0,0 +1,68 @@
+package eva2.server.go.problems;
+
+
+
+import eva2.server.go.strategies.InterfaceOptimizer;
+
+/**
+ * The integer hyper-sphere problem.
+ * 
+ * User: streiche, mkron
+ */
+public class I1Problem extends AbstractProblemInteger implements java.io.Serializable {
+
+	public I1Problem() {
+	}
+	
+    public I1Problem(I1Problem o) {
+		super.cloneObjects(o);
+	}
+
+	/** This method returns a deep clone of the problem.
+     * @return  the clone
+     */
+    public Object clone() {
+        return (Object) new I1Problem(this);
+    }
+
+    /** Ths method allows you to evaluate a simple bit string to determine the fitness
+     * @param x     The n-dimensional input vector
+     * @return  The m-dimensional output vector.
+     */
+    public double[] eval(int[] x) {
+        double[] result = new double[1];
+        result[0]     = 0;
+        for (int i = 0; i < x.length; i++) {
+            result[0]  += Math.pow(x[i], 2);
+        }
+        result[0] += 1;
+        return result;
+    }
+
+    /** This method returns a string describing the optimization problem.
+     * @param opt       The Optimizer that is used or had been used.
+     * @return The description.
+     */
+    public String getStringRepresentationForProblem(InterfaceOptimizer opt) {
+        String result = "";
+
+        result += "I1 Problem:\n";
+        result += "Here the individual codes a vector of int numbers x and F1(x)= x^2 is to be minimized.\n";
+        result += "Parameters:\n";
+        result += "Dimension   : " + this.m_ProblemDimension +"\n";
+        result += "Solution representation:\n";
+        return result;
+    }
+
+/**********************************************************************************************************************
+ * These are for GUI
+ */
+
+    public String getName() {
+        return "I1 Problem";
+    }
+
+    public static String globalInfo() {
+        return "I1(x) = x^2 is to be minimized.";
+    }
+}
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