「矩形頂點刪除法」是進階數獨技巧，基礎為使用兩個平行的列或兩個平行的行，不需要考慮 3x3 的宮，此策略和宮無關。
請看這兩列，每列各有兩個格子的註記出現 4，同列或同行不可能重複出現 4，因此可以放心確定 4 會各自出現在對角處，也就是淺藍格子或深藍格子。
拉遠一點來看受影響的各行，因為 4 位於對角處，這幾行會各有一個數字 4，這代表不能再填入數字 4。
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.