1 files changed, 5 insertions, 2 deletions
diff --git a/rules.js b/rules.js
index ce96410..6d1efa0 100644
--- a/rules.js
+++ b/rules.js
@@ -5684,8 +5684,11 @@ states.retreat_lone_leader = {
 		}
 		for_each_exit(from, to => {
 			if (can_defender_retreat_from_to(who, from, to)) {
-				can_retreat = true
-				gen_action_space(to)
+				// Forbid lone leader to coexist with enemy lone leader
+				if (!has_unbesieged_enemy_leader(to)) {
+					can_retreat = true
+					gen_action_space(to)
+				}
 			}
 		})
 		if (!can_retreat)