diff --git a/src/components/EternalDominationGame.tsx b/src/components/EternalDominationGame.tsx
index cb01d45..481b610 100644
--- a/src/components/EternalDominationGame.tsx
+++ b/src/components/EternalDominationGame.tsx
@@ -282,35 +282,15 @@ const defendAttack = (guards: Set<string>, attack: Position): {
     shiftBorderToFillGap(newGuards, movements, currentGap);
   }
   
-  // STEP 3: Check if we need a second chain (Figure 10 shows two chains)
-  // This happens when the attack disrupts multiple domination lines
-  
-  // Find interior positions that are now undominated and need filling
-  for (let x = 1; x < COLS - 1; x++) {
-    for (let y = 2; y < ROWS - 2; y++) {
-      if (!isDominated(x, y, newGuards)) {
-        // Need to get a guard here
-        const nbs = getHexNeighbors(x, y);
-        const nearbyGuard = nbs.find(n => newGuards.has(posKey(n)) && isInterior(n.x, n.y));
-        
-        if (nearbyGuard) {
-          newGuards.delete(posKey(nearbyGuard));
-          newGuards.add(posKey({ x, y }));
-          movements.push({ from: nearbyGuard, to: { x, y }, type: 'interior' });
-        } else {
-          // Use border guard
-          const borderGuard = nbs.find(n => newGuards.has(posKey(n)) && isBorder(n.x, n.y));
-          if (borderGuard) {
-            newGuards.delete(posKey(borderGuard));
-            newGuards.add(posKey({ x, y }));
-            movements.push({ from: borderGuard, to: { x, y }, type: 'toInterior' });
-            shiftBorderToFillGap(newGuards, movements, borderGuard);
-          }
-        }
-      }
-    }
-  }
-  
+  // NOTE: The paper's strategy restores the original configuration via the border "patchwork"
+  // (complementary paths) rather than ad-hoc re-domination fixes.
+  //
+  // The previous implementation included an extra "scan for undominated vertices and move a nearby guard"
+  // step, which can look like guards "manifest" and is not part of the Figure 10 defense.
+
+  // Safety: guards are never created/destroyed—only moved.
+  if (newGuards.size !== guards.size) return null;
+
   return { newGuards, movements };
 };