From 9988b83b544f58a5dde299640852255ff499b985 Mon Sep 17 00:00:00 2001
From: 1brucben <1benjbruce@gmail.com>
Date: Sat, 19 Apr 2025 00:32:27 +0200
Subject: [PATCH] fix for empty tile set

---
 src/core/execution/AttackExecution.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/core/execution/AttackExecution.ts b/src/core/execution/AttackExecution.ts
index 3acdf50b0..34bfa3e12 100644
--- a/src/core/execution/AttackExecution.ts
+++ b/src/core/execution/AttackExecution.ts
@@ -237,7 +237,17 @@ export class AttackExecution implements Execution {
       const priorityTiles: { tile: TileRef; weight: number }[] = [];
       const fallbackTiles: { tile: TileRef; weight: number }[] = [];
 
-      for (const tile of this.toConquer) {
+      const validTiles = this.toConquer.filter((tile) => {
+        const onBorder = this.mg
+          .neighbors(tile)
+          .some((t) => this.mg.owner(t) === this._owner);
+        return this.mg.owner(tile) === this.target && onBorder;
+      });
+      if (validTiles.length === 0) {
+        this.retreat();
+        return;
+      }
+      for (const tile of validTiles) {
         const neighbors = this.mg.neighbors(tile);
         const ownedCount = neighbors.filter(
           (t) => this.mg.owner(t) === this._owner,