diff --git a/src/model.c b/src/model.c
index 9511665..c8112f8 100644
--- a/src/model.c
+++ b/src/model.c
@@ -133,31 +133,20 @@ e_location get_next_outer_position(s_utictactoe *p_uttt) {
     return FREE;
 }
 
-e_status is_move_valid(s_utictactoe *p_uttt, s_move *p_move){
+e_status is_move_valid(s_utictactoe *p_uttt, s_move *p_move) {
+    if ( p_uttt->outer_tictactoe->winner != NOBODY ) {
+        return NO;
+    }
+    
     if ( get_next_player_to_play(p_uttt) != p_move->player ) {
         return NO;
     }
-    if ( p_uttt->inception_level == 1 ) {
-        if ( p_uttt->outer_tictactoe->winner == NOBODY
-        && p_uttt->outer_tictactoe->content[p_move->outer_position] == NOBODY) {
-            return YES;
-        }
-        else {
-            return NO;
-        }
-    }
-    else {
-        if (p_uttt->outer_tictactoe->winner == NOBODY 
-        && p_uttt->inner_tictactoes[p_move->outer_position]->content[p_move->inner_position] == NOBODY 
-        && p_uttt->inner_tictactoes[p_move->outer_position]->winner == NOBODY ) 
-        {
-            return YES;
-        }
-        else
-        {
-            return NO;
-        }
+    
+    if ( get_next_outer_position(p_uttt) != FREE 
+            && get_next_outer_position(p_uttt) != p_move->outer_position) {
+        return NO;
     }
+
     return YES;
 }