[OK]

Privacy Policy  -  Terms & Conditions  -  See Details
We use cookies to personalise content and ads. We also share information about your use of our site with our advertising partners who may combine it with other information you've provided to them or they've collected from your use of their services.

BB Logo
Spacer
Line
Line
Pinned Squares

A pinned square is one where it is the only square where a particular number can go in a row, column or 3x3 block and is basically the full version of intersections. Pencil marks are not required to use this technique, but sometimes they make it easier to see a pinned square.

Sudoku Image

For example looking at the <5> in R1C1 and R4C4 we can see that <5> is pinned to R2C8 as this is the only square in R2 where <5> can go. Although not highlighted, <5> is also pinned to R3C6 as it is the only square in Block2 where <5> can go.

Sudoku Image

Using 'Show squares with a...' and selecting <1>, it is clear that R9C5 must be a <1>. It is the only place the <1> can go in Block8 and so <1> is pinned to R9C5.

 

Line


BrainBashers™ is a trademark. We use cookies to personalise content and ads. We also share information about your use of our site with our advertising partners who may combine it with other information you've provided to them or they've collected from your use of their services. For more information please view our privacy policy. By using the site you also agree to our terms and conditions.

Line
Line