diff --git a/src/ibea/ibea.cpp b/src/ibea/ibea.cpp
index 7147c8e773d1e7d4822dfdbc53e8a6d9f49f6636..a175e8a9d52db3bfe8ae0e127aa0f08db4cdcc5b 100644
--- a/src/ibea/ibea.cpp
+++ b/src/ibea/ibea.cpp
@@ -18,9 +18,9 @@ void ibea(evaluate_function_t evaluate,
           coco_random_state_t *random_generator)
 {
   /* Parameters */
-  int n_individus = 20; /* number of individus per generations */
+  int n_individus = 10; /* number of individus per generations */
   int n_generations = 2; /* number of generations */
-  int mu = 10; /* number of tournament */
+  int mu = 5; /* number of tournament */
   double eta = 20; /* polynomiale mutation degree */
   double p_combination = 1;
   double p_mutation = 0.1;
@@ -41,19 +41,25 @@ void ibea(evaluate_function_t evaluate,
     pop.evaluate(evaluate);
     pop.compute_indicators();
     pop.compute_fitnesses(kappa);
+    pop.printFitnesses();
     cout << "Evaluation & Fitness done" << endl;
 
     new_pop.empty();
     cout << "New population !" << endl;
     while (new_pop.getCurrentSize() < n_individus){
       /* 3 Environemental select */
+      cout << "Darwin begin" << endl;
       pop.darwin(kappa);
+      pop.printFitnesses();
       cout << "Darwin done" << endl;
 
       /* 4 */
 
       /* 5 Fill mating pool */
+
+      cout << "Tournament begin" << endl;
       binary_tournament(pop, new_pop, mu, random_generator);
+      pop.printFitnesses();
       cout << "Tournament done" << endl;
     }
 
diff --git a/src/ibea/population.cpp b/src/ibea/population.cpp
index 705e8bb55f130722a996f09a008911826ceb646e..e89a2cf891fa0dedaf6a11823add7f8fb127e3ec 100644
--- a/src/ibea/population.cpp
+++ b/src/ibea/population.cpp
@@ -219,11 +219,21 @@ void Population::darwin(double kappa){
   }
 }
 
+void Population::printPopulation(){
+  cout << "Population : " << endl;
+  for (int i=0; i < current_size_; i++){
+    for (int j=0; j < dimension_; j++){
+      printf("%+6.4lf ", population_[i][j]);
+    }
+    printf("\n");
+  }
+}
+
 void Population::printValues(){
   cout << "Values : " << endl;
   for (int i=0; i < current_size_; i++){
     for (int j=0; j < dimension_; j++){
-      printf("%5f", values_[i][j]);
+      printf("%+6.4lf ", values_[i][j]);
     }
     printf("\n");
   }
@@ -233,7 +243,7 @@ void Population::printIndicatorValues(){
   cout << "Indicator Values : " << endl;
   for (int i=0; i < current_size_; i++){
     for (int j=0; j < current_size_; j++){
-      printf("%5f", indicator_values_[i][j]);
+      printf("%+6.4lf ", indicator_values_[i][j]);
     }
     printf("\n");
   }
@@ -242,7 +252,7 @@ void Population::printIndicatorValues(){
 void Population::printFitnesses(){
   cout << "Fitnesses : " << endl;
   for (int i=0; i < current_size_; i++){
-    printf("%5f", fitnesses_[i]);
+    printf("%+6.4lf ", fitnesses_[i]);
   }
   printf("\n");
 }
diff --git a/src/ibea/population.h b/src/ibea/population.h
index 106dd16883166b934a6f5f143cbfec89d851d884..5af0b0a4b10f08893055cc36dd9b1ca95a6db32d 100644
--- a/src/ibea/population.h
+++ b/src/ibea/population.h
@@ -32,6 +32,7 @@ public:
   void printFitnesses();
   void printIndicatorValues();
   void printValues();
+  void printPopulation();
 
 private:
   int size_;