[X]

Privacy Policy + T&C

We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.

[X]

Common Answers

Have you entered August's Common Answers?

BB Logo
Spacer
Line
Line
Sudoku Solution Path

? ?

R1C3 can only be <7>
R4C2 can only be <6>
R5C5 can only be <6>
R7C9 can only be <1>
R9C3 can only be <8>
R4C8 can only be <7>
R4C1 can only be <8>
R5C3 can only be <1>
R7C1 can only be <9>
R4C9 can only be <5>
R7C5 can only be <8>
R1C4 is the only square in row 1 that can be <8>
R5C1 is the only square in row 5 that can be <7>
R5C9 is the only square in row 5 that can be <8>
R6C8 is the only square in row 6 that can be <6>
R6C2 is the only square in row 6 that can be <9>
R5C2 can only be <3>
R5C8 can only be <2>
R6C1 can only be <2>
R5C7 can only be <9>
R9C8 can only be <3>
R6C9 can only be <3>
R3C9 can only be <4>
R8C9 can only be <7>
R9C7 can only be <2>
R1C8 can only be <1>
R2C9 can only be <2>
R1C7 can only be <3>
R1C6 is the only square in row 1 that can be <2>
R9C5 is the only square in row 9 that can be <9>
Intersection of column 4 with block 8. The value <5> only appears in one or more of squares R7C4, R8C4 and R9C4 of column 4. These squares are the ones that intersect with block 8. Thus, the other (non-intersecting) squares of block 8 cannot contain this value.
   R8C5 - removing <5> from <1345> leaving <134>
Squares R1C5 and R8C1 form a remote locked pair. <45> can be removed from any square that is common to their groups.
   R8C5 - removing <4> from <134> leaving <13>
Intersection of column 5 with block 2. The values <45> only appears in one or more of squares R1C5, R2C5 and R3C5 of column 5. These squares are the ones that intersect with block 2. Thus, the other (non-intersecting) squares of block 2 cannot contain these values.
   R2C6 - removing <4> from <147> leaving <17>
The puzzle can be reduced to a Bivalue Universal Grave (BUG) pattern, by making this reduction:
   R2C5=<14>
These are called the BUG possibilities. In a BUG pattern, in each row, column and block, each unsolved possibility appears exactly twice. Such a pattern either has 0 or 2 solutions, so it cannot be part of a valid Sudoku
When a puzzle contains a BUG, and only one square in the puzzle has more than 2 possibilities, the only way to kill the BUG is to remove both of the BUG possibilities from the square, thus solving it
   R2C5 - removing <14> from <134> leaving <3>
R2C1 can only be <4>
R2C4 can only be <7>
R3C5 can only be <5>
R8C5 can only be <1>
R3C1 can only be <3>
R1C5 can only be <4>
R8C6 can only be <4>
R8C1 can only be <5>
R9C6 can only be <7>
R9C4 can only be <5>
R2C6 can only be <1>
R1C2 can only be <5>
R8C4 can only be <3>
R9C2 can only be <4>


 

This website uses cookies, for more information please view our privacy policy. By using the site you also agree to our terms and conditions. By using the site you also agree to our terms and conditions.

Line
Line