add better enemy constrictor projection

tests/test_BestBattleSnake.py

@@ -681,5 +681,75 @@ class TestBestBattleSnake(unittest.TestCase):
     move = make_board(game_state).snake_neat_make_a_move()
     self.assertEqual(move, "right")
 
+  def test_constrictor_prefers_choke_when_safe(self):
+    game_state = {
+      "game": {
+        "id": "test-constrictor-choke",
+        "ruleset": {"name": "constrictor", "version": "v1.0.0"},
+        "source": "custom",
+        "map": "standard",
+      },
+      "turn": 25,
+      "board": {
+        "height": 7,
+        "width": 7,
+        "food": [],
+        "hazards": [],
+        "snakes": [
+          {
+            "id": "me",
+            "name": "me",
+            "health": 100,
+            "length": 7,
+            "head": {"x": 2, "y": 3},
+            "body": [
+              {"x": 2, "y": 3},
+              {"x": 2, "y": 2},
+              {"x": 1, "y": 2},
+              {"x": 1, "y": 3},
+              {"x": 1, "y": 4},
+              {"x": 2, "y": 4},
+              {"x": 2, "y": 5},
+            ],
+          },
+          {
+            "id": "enemy",
+            "name": "enemy",
+            "health": 100,
+            "length": 7,
+            "head": {"x": 4, "y": 3},
+            "body": [
+              {"x": 4, "y": 3},
+              {"x": 5, "y": 3},
+              {"x": 5, "y": 2},
+              {"x": 4, "y": 2},
+              {"x": 4, "y": 1},
+              {"x": 5, "y": 1},
+              {"x": 6, "y": 1},
+            ],
+          },
+        ],
+      },
+      "you": {
+        "id": "me",
+        "name": "me",
+        "health": 100,
+        "length": 7,
+        "head": {"x": 2, "y": 3},
+        "body": [
+          {"x": 2, "y": 3},
+          {"x": 2, "y": 2},
+          {"x": 1, "y": 2},
+          {"x": 1, "y": 3},
+          {"x": 1, "y": 4},
+          {"x": 2, "y": 4},
+          {"x": 2, "y": 5},
+        ],
+      },
+    }
+
+    move = make_board(game_state).snake_neat_make_a_move()
+    self.assertEqual(move, "right")
+
 if __name__ == "__main__":
   unittest.main()