diff --git a/battleship/utils.py b/battleship/utils.py
index 8932d18..6e4b5f3 100644
--- a/battleship/utils.py
+++ b/battleship/utils.py
@@ -103,7 +103,7 @@ def kill_field(field):
     for i in range(10):
         for j in range(10):
             if cells[i][j] == '+':
-                ship = [(i, j)]
+                ship = set([(i, j)])
                 queue = [(i, j)]
                 killed = True
                 while queue:
@@ -114,29 +114,33 @@ def kill_field(field):
                             killed = False
                             break
                         elif cells[x - 1][y] == '+':
-                            ship.append((x - 1, y))
-                            queue.append((x - 1, y))
+                            if (x - 1, y) not in ship:
+                                queue.append((x - 1, y))
+                                ship.add((x - 1, y))
                     if x < 9:
                         if cells[x + 1][y] == 'o':
                             killed = False
                             break
                         elif cells[x + 1][y] == '+':
-                            ship.append((x + 1, y))
-                            queue.append((x + 1, y))
+                            if (x + 1, y) not in ship:
+                                ship.add((x + 1, y))
+                                queue.append((x + 1, y))
                     if y > 0:
                         if cells[x][y - 1] == 'o':
                             killed = False
                             break
                         elif cells[x][y - 1] == '+':
-                            ship.append((x, y - 1))
-                            queue.append((x, y - 1))
+                            if (x, y - 1) not in ship:
+                                ship.add((x, y - 1))
+                                queue.append((x, y - 1))
                     if y < 9:
                         if cells[x][y + 1] == 'o':
                             killed = False
                             break
                         elif cells[x][y + 1] == '+':
-                            ship.append((x, y + 1))
-                            queue.append((x, y + 1))
+                            if (x, y + 1) not in ship:
+                                ship.add((x, y + 1))
+                                queue.append((x, y + 1))
                 if killed:
                     for x, y in ship:
                         cells[x][y] = 'x'
diff --git a/battleship/views.py b/battleship/views.py
index ed27013..9cbc943 100644
--- a/battleship/views.py
+++ b/battleship/views.py
@@ -98,7 +98,7 @@ def shoot(request):
         new_symb = '+'
     else:
         new_symb = '.'
-    player.game.turn = (1 - player.game.turn)
+        player.game.turn = (1 - player.game.turn)
     player.game.last_move_ts = timezone.now()
     player.game.save()
     if pos == 0:
@@ -114,7 +114,7 @@ def shoot(request):
         player.game.winner = player.number
         player.game.save()
     return JsonResponse({
-        'shot': new_symb == 'x',
+        'shot': new_symb == '+',
         'game_finish': game_finish
     })