diff --git a/packages/misskey-reversi/src/maps.ts b/packages/misskey-reversi/src/maps.ts
index c0fbae16b..ac57fbb72 100644
--- a/packages/misskey-reversi/src/maps.ts
+++ b/packages/misskey-reversi/src/maps.ts
@@ -680,29 +680,6 @@ export const dealWithIt: Map = {
 	],
 };
 
-export const bigBoard: Map = {
-	name: 'Big board',
-	category: 'Special',
-	data: [
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'-------wb-------',
-		'-------bw-------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-		'----------------',
-	],
-};
-
 export const twoBoard: Map = {
 	name: 'Two board',
 	category: 'Special',