From f71d508e346ae2b4bfae1d7b9d91d4de0d61ac6d Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@drexel.edu>
Date: Fri, 26 Mar 2010 00:19:41 -0400
Subject: [PATCH] Added adjacency checking to Engine.attack_and_fortify.

---
 risk/base.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/risk/base.py b/risk/base.py
index e1ea622..9fdda26 100644
--- a/risk/base.py
+++ b/risk/base.py
@@ -620,6 +620,9 @@ class Engine (ID_CmpMixin):
                 source_name,target_name,armies = action
                 source = self.world.territory_by_name(source_name)
                 target = self.world.territory_by_name(target_name)
+                if not source.borders(target):
+                    raise PlayerError('Cannot reach %s from %s to %s'
+                                      % (target, source, mode))
                 if mode == 'attack':
                     tplayer = target.player
                     capture = self.attack(source, target, armies)
-- 
2.26.2