On the other hand, Royle and others working independently have managed to find one 16-clue puzzle that has just two solutions.Searchers have not yet uncovered any additional examples.

• 另一方面，罗艾尔和其他人已经各自在寻找16数字初盘只有两个解的情形，不过迄今也还没有找到更多的例子。