diff --git a/src/components/game2048/Game2048.vue b/src/components/game2048/Game2048.vue
index f3ca690..37bab42 100644
--- a/src/components/game2048/Game2048.vue
+++ b/src/components/game2048/Game2048.vue
@@ -190,7 +190,7 @@
 }
 </style>
 <script lang="ts" setup>
-import { useGame2048Store, type GameState, type Tile } from '@/stores/2048';
+import { useGame2048Store, type GameState } from '@/stores/2048';
 import { chainIterables } from '@/utils';
 import { get2DArrayItem } from '@/utils/array';
 import { type Future, FutureMap } from '@/utils/future';
@@ -201,6 +201,11 @@ import { add, pick, sample, shuffle } from 'lodash-es';
 import { storeToRefs } from 'pinia';
 import { computed, onMounted, onUnmounted, reactive, ref, useTemplateRef, watch } from 'vue';
 const game2048Store = useGame2048Store();
+interface Tile {
+  id: number;
+  number: number;
+  fromOthers: boolean;
+}
 type SingleTileLine = (Tile | undefined)[];
 type OverlappedTileLine = Tile[][];
 /**
@@ -311,7 +316,7 @@ const tileBackgroundColorMapping: Record<number, string | undefined> = {
  */
 function storeTileGrid() {
   game2048Store.rawTileGrid = tileGrid.map((row) =>
-    row.map((tiles) => tiles.map((tile) => pick(tile, 'number', 'removed'))),
+    row.map((tiles) => tiles.map((tile) => pick(tile, 'number'))),
   );
 }
 
@@ -356,7 +361,6 @@ function addRandomTiles(randomCount: number, randomNumbers: number[] = [2, 4]) {
     const tile: Tile = {
       id: maxId++,
       number: sample(randomNumbers) ?? 2,
-      removed: false,
       fromOthers: false,
     };
     tiles.push(tile);
@@ -396,12 +400,9 @@ function mergeLineImpl(tileRelationMap: TileRelationMap, line: SingleTileLine, o
         if (prevTile.number === tile.number) {
           finished = false;
           changed = true;
-          prevTile.removed = true;
-          tile.removed = true;
           const newTile: Tile = {
             id: maxId++,
             number: tile.number * 2,
-            removed: false,
             fromOthers: true,
           };
           tileRelationMap.set(
@@ -723,7 +724,6 @@ useEventListener(gameContainerRef, 'touchend', (e) => {
   triggerMove(x, y);
   startPos = { x: -1, y: -1 };
 });
-
 useEventListener(document, 'keydown', async (e) => {
   e.preventDefault();
   move(e.key);
diff --git a/src/components/game2048/Game2048V2.vue b/src/components/game2048/Game2048V2.vue
index d1e0f4a..d6baec1 100644
--- a/src/components/game2048/Game2048V2.vue
+++ b/src/components/game2048/Game2048V2.vue
@@ -419,7 +419,7 @@ const move = async (key: Directions) => {
   }
   const tilesToAdd: Exposed<Tile>[] = [];
   if (tilesToMove.size) {
-    tilesToAdd.push(...addRandomTiles(2));
+    tilesToAdd.push(...addRandomTiles(1));
   }
   await Promise.all(Iterator.from(tilesToMove).map((t) => t.move()));
   tilesToHide.forEach((t) => t.hide());
diff --git a/src/stores/2048.ts b/src/stores/2048.ts
index df517ab..2891e86 100644
--- a/src/stores/2048.ts
+++ b/src/stores/2048.ts
@@ -3,20 +3,14 @@ import { create2DArray } from '@/utils/array';
 import { useLocalStorage } from '@vueuse/core';
 import { defineStore } from 'pinia';
 import { readonly, watch } from 'vue';
-
-export interface Tile {
-  id: number;
-  number: number;
-  removed: boolean;
-  fromOthers: boolean;
-}
+export type TileSerialized = { number: number };
 
 export type GameState = 'playing' | 'succeed' | 'failed';
 export const useGame2048Store = defineStore('2048', () => {
   const { key: gameKey, refresh: refreshGame } = useRefresh();
 
   function create() {
-    return create2DArray<Tile[]>(height.value, width.value, () => []);
+    return create2DArray<TileSerialized[]>(height.value, width.value, () => []);
   }
 
   function $reset() {
@@ -38,10 +32,7 @@ export const useGame2048Store = defineStore('2048', () => {
   height.value = 4;
   successNumber.value = 2048;
   watch([width, height], $reset, { flush: 'sync' });
-  const rawTileGrid = useLocalStorage<Pick<Tile, 'number' | 'removed'>[][][]>(
-    '2048-tile-grid',
-    create(),
-  );
+  const rawTileGrid = useLocalStorage<TileSerialized[][][]>('2048-tile-grid', create());
   watch(
     rawTileGrid,
     () => {
diff --git a/src/utils/array.ts b/src/utils/array/index.ts
similarity index 66%
rename from src/utils/array.ts
rename to src/utils/array/index.ts
index 8f05094..d9f691e 100644
--- a/src/utils/array.ts
+++ b/src/utils/array/index.ts
@@ -1,5 +1,6 @@
-import type { MaybeArray } from './types';
+import type { MaybeArray } from '@/utils/types';
 
+export * from './zip';
 export function create2DArray<T>(
   height: number,
   width: number,
@@ -16,22 +17,6 @@ export function* iter2DArray<T>(grid: T[][]): Generator<[number, number, T], voi
     }
   }
 }
-export type Zip<T extends Iterable<unknown>[]> = T extends [
-  infer R,
-  ...infer S extends Iterable<unknown>[],
-]
-  ? R extends Iterable<infer U>
-    ? [U, ...Zip<S>]
-    : []
-  : [];
-export function* zip<T extends Iterable<unknown>[]>(...its: T): Generator<Zip<T>, void, unknown> {
-  const iterators = its.map((it) => it[Symbol.iterator]());
-  while (true) {
-    const nextValues = iterators.map((it) => it.next());
-    if (nextValues.some(({ done }) => done)) break;
-    yield nextValues.map(({ value }) => value) as any;
-  }
-}
 export function* entries<T>(it: Iterable<T>): Generator<[number, T], void, unknown> {
   let i = 0;
   for (const value of it) {
diff --git a/src/utils/array/zip.ts b/src/utils/array/zip.ts
new file mode 100644
index 0000000..7341d83
--- /dev/null
+++ b/src/utils/array/zip.ts
@@ -0,0 +1,46 @@
+type ZipSimple<T extends readonly Iterable<unknown>[]> = {
+  [P in keyof T]: T[P] extends Iterable<infer U> ? U : never;
+};
+type FixedTuple<T = unknown> = (readonly [T, ...T[]] & readonly [...T[], T]) | readonly [];
+type ZipTuple1<T extends FixedTuple[]> = {
+  [I in keyof T]: T[I] extends FixedTuple
+    ? T[I] extends readonly [infer R, ...infer S extends FixedTuple]
+      ? [R, S]
+      : never
+    : never;
+};
+type IndexGetter<T extends unknown[][], I extends keyof T[number]> = {
+  [I2 in keyof T]: T[I2][I];
+};
+type ZipTuple2<T extends [unknown, FixedTuple][]> = true extends {
+  [I in keyof T]: [T[I]] extends [never]
+    ? true
+    : true extends {
+          [I2 in keyof T[I]]: [T[I][I2]] extends [never] ? true : false;
+        }[keyof T[I]]
+      ? true
+      : false;
+}[keyof T]
+  ? never
+  : [IndexGetter<T, 0>, IndexGetter<T, 1>];
+type ZipTuple3<T extends [unknown[], FixedTuple[]]> = [T] extends [never]
+  ? []
+  : T extends [[], []]
+    ? []
+    : [T[0], ...ZipTuple<T[1]>];
+type ZipTuple<T extends FixedTuple[]> = ZipTuple3<ZipTuple2<ZipTuple1<T>>>;
+type Zip<T extends readonly Iterable<unknown>[]> = T extends FixedTuple[]
+  ? ZipTuple<T>
+  : ZipSimple<T>;
+export function* zip<T extends readonly Iterable<unknown>[]>(
+  ...iterables: T
+): Generator<Zip<T>, void, unknown> {
+  const its = iterables.map((it) => Iterator.from(it));
+  while (true) {
+    const nexts = its.map((it) => it.next());
+    if (nexts.some(({ done }) => done)) {
+      return;
+    }
+    yield nexts.map(({ value }) => value) as any;
+  }
+}
diff --git a/src/utils/table-view.ts b/src/utils/table-view.ts
index e362e4b..d5113d3 100644
--- a/src/utils/table-view.ts
+++ b/src/utils/table-view.ts
@@ -40,8 +40,14 @@ export class TableView<T> {
       yield this.getLine(i, xFirst);
     }
   }
-  toArray(xFirst: boolean = false) {
-    return Array.from(this.iter(xFirst).map((line) => line.toArray()));
+  toArray<R = T | undefined>(xFirst: boolean = false, converter?: (v: T | undefined) => R) {
+    return Array.from(
+      this.iter(xFirst).map((line) =>
+        Iterator.from(line)
+          .map((v) => (converter ? converter(v) : (v as unknown as R)))
+          .toArray(),
+      ),
+    );
   }
   clear() {
     this.map.clear();