diff --git a/src/engine/build/helper.ts b/src/engine/build/helper.ts
index 5b7993b7..8eb41f15 100644
--- a/src/engine/build/helper.ts
+++ b/src/engine/build/helper.ts
@@ -175,7 +175,7 @@ export class BuilderHelper {
   checkOwnershipMarkerLimits(): void {
     const count = this.grid().countOwnershipMarkers(this.currentPlayer().color);
     const ownershipMarkerLimit = this.ownershipMarkerLimit();
-    assert(count <= ownershipMarkerLimit, `cannot exceed ownership marker limit of ${ownershipMarkerLimit}`);
+    assert(count <= ownershipMarkerLimit, { invalidInput: `cannot exceed ownership marker limit of ${ownershipMarkerLimit}` });
   }
 
   protected ownershipMarkerLimit(): number {
diff --git a/src/maps/denmark/builder_helper.ts b/src/maps/denmark/builder_helper.ts
new file mode 100644
index 00000000..8936515d
--- /dev/null
+++ b/src/maps/denmark/builder_helper.ts
@@ -0,0 +1,7 @@
+import { BuilderHelper } from "../../engine/build/helper";
+
+export class DenmarkBuilderHelper extends BuilderHelper {
+    protected ownershipMarkerLimit(): number {
+        return Infinity;
+    }
+}
diff --git a/src/maps/denmark/rules.tsx b/src/maps/denmark/rules.tsx
index bf2e17ba..b7b20f3e 100644
--- a/src/maps/denmark/rules.tsx
+++ b/src/maps/denmark/rules.tsx
@@ -80,6 +80,7 @@ export function DenmarkRules() {
           $6 for $11-$15, $8 for $16-$20 and $10 for everything larger than
           that.
         </li>
+        <li>Track ownership markers and town markers are not limited.</li>
       </ul>
     </div>
   );
diff --git a/src/maps/denmark/settings.ts b/src/maps/denmark/settings.ts
index b4aed4e6..6a7127fa 100644
--- a/src/maps/denmark/settings.ts
+++ b/src/maps/denmark/settings.ts
@@ -31,6 +31,7 @@ import { DenmarkMoneyManager } from "./money_manager";
 import { DenmarkMoveValidator } from "./move_validator";
 import { DenmarkShareHelper, DenmarkTakeSharesAction } from "./shares";
 import { DenmarkStarter } from "./starter";
+import { DenmarkBuilderHelper } from "./builder_helper";
 
 export class DenmarkMapSettings implements MapSettings {
   static readonly key = GameKey.DENMARK;
@@ -99,6 +100,7 @@ export class DenmarkMapSettings implements MapSettings {
       DenmarkMoveHelper,
       DenmarkProfitHelper,
       DenmarkActionNamingProvider,
+      DenmarkBuilderHelper,
     ];
   }