diff --git a/Backtracking/NQueen.js b/Backtracking/NQueen.js
index dfd3dfa9fb..2ea89680b2 100644
--- a/Backtracking/NQueen.js
+++ b/Backtracking/NQueen.js
@@ -1,6 +1,6 @@
 class NQueen {
 constructor (size) {
- this.board = new Array(size).fill('.').map(() => new Array(size).fill('.'))
+ this.board = new Array(size).fill(Array(size).fill('.'));
 this.size = size
 }
 
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/TheAlgorithms/JavaScript/pull/574.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/TheAlgorithms/JavaScript/pull/574.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>