“唯一候选数”是一种简单策略，适用于初学者。它基于找到缺少的数字。要找到缺少的数字，您应该看看感兴趣的 3×3 宫，以及与之相连的行和列中已经有哪些数字。
注意突出显示的单元格。看看它的宫、行和列中的数字。我们可以发现这一行、列和宫中已经包含数字 1、2、3、4、6、7、8 和 9。
唯一缺少的数字是 5。考虑到数字不能重复，这个单元格中可以填入的唯一数字必然为 5。
Cookies are small pieces of text sent to your web browser that assist us in providing our Services according to the purposes described. A cookie file is stored in your web browser and allows our Services or a third-party to recognize you and make your next visit easier and the Service more useful to you. Some of the purposes for which Cookies are installed may also require the User's consent.
Cookies can be "persistent" or "session" cookies. Persistent cookies remain on your personal computer or mobile device when you go offline, while session cookies are deleted as soon as you close your web browser.
Strictly necessary cookies are set to recognise you when you return to our Website, set up your consent settings, and embed functionality from third party services. Also, these cookies enable us to personalise our content for you and remember your last game progress. These cookies are necessary for the functionality of the Website. You may set your browser to block these cookies, but the Website will not function properly without them.
We may use analytics cookies to track information on how the Website is used so that we can make improvements. We may also use analytics cookies to test new advertisements, pages, features or new functionality of the Website to see how our users react to them.
These types of cookies and other storage technologies such as Pixel Tags are used to deliver advertisements on and through the Service and track the performance of these advertisements. To this end, we may share information about your use of our site with our trusted social media and advertising partners. These cookies may also be used to enable third-parties, including social media and advertising networks to provide measurement services and deliver ads that may be relevant to you based upon your activities or interests.
Please click here to learn more about the cookies we use on our Website.