diff --git a/src/main/kotlin/cc/maxmc/blastingcrisis/game/GamePlaceBreakRule.kt b/src/main/kotlin/cc/maxmc/blastingcrisis/game/GamePlaceBreakRule.kt
index 3fced52..2c0a716 100644
--- a/src/main/kotlin/cc/maxmc/blastingcrisis/game/GamePlaceBreakRule.kt
+++ b/src/main/kotlin/cc/maxmc/blastingcrisis/game/GamePlaceBreakRule.kt
@@ -39,17 +39,19 @@ class GamePlaceBreakRule(val game: Game) {
             game.map.teams.flatMap {
                 it.sides + it.mine
             }.map {
-                it.containsBlock(loc)
+                it.containsBlock(loc).also { result -> debug("area $it contains $loc is $result") }
             }.reduce { a, b -> a || b }
         }
 
         // allow enemy wall
         addRule("allow_enemy_wall") { player, type, loc ->
             val team = player.team ?: return@addRule false
-            val result = game.teams.filterNot { it == team }
+            val isWall = game.teams
                 .map { team.teamInfo.wall.containsBlock(loc) }
                 .reduce { a, b -> a || b }
-            if (type == BREAK) result else !result
+            if (!isWall) return@addRule false
+            val isHome = team.teamInfo.wall.containsBlock(loc)
+            (type == BREAK) xor isHome
         }
     }
 }
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