skip to main content




Daily Sudoku Answer 



BrainBashers doesn't show adverts, and I continue to depend on the ongoing support from everyone who enjoys the site.

Please consider supporting BrainBashers [hide]
Loading

X

Loading

Oct 21 - Super Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s075697



Reasoning 



R3C4 can only be <7>

R6C5 can only be <3>

R3C6 can only be <2>

R2C5 can only be <5>

R4C6 can only be <6>

R6C6 can only be <9>

R4C5 can only be <2>

R6C4 can only be <8>

R8C5 can only be <7>

R6C1 can only be <6>

R4C4 can only be <1>

R7C6 can only be <5>

R5C4 can only be <5>

R5C6 can only be <7>

R7C4 can only be <9>

R6C9 can only be <4>

R1C1 is the only square in row 1 that can be <2>

R1C9 is the only square in row 1 that can be <9>

R1C8 is the only square in row 1 that can be <5>

R5C9 is the only square in row 5 that can be <2>

Squares R9C2 and R9C8 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <38>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C1 - removing <38> from <35789> leaving <579>

R9C3 - removing <38> from <3789> leaving <79>

R9C7 - removing <3> from <137> leaving <17>

R9C9 - removing <38> from <13578> leaving <157>

Squares R1C3 and R5C3 in column 3 and R1C7 and R5C7 in column 7 form a Simple X-Wing pattern on possibility <3>. All other instances of this possibility in rows 1 and 5 can be removed.

R5C1 - removing <3> from <1389> leaving <189>

R1C2 - removing <3> from <34> leaving <4>

R5C2 - removing <3> from <138> leaving <18>

R5C8 - removing <3> from <368> leaving <68>

R3C8 is the only square in row 3 that can be <4>

R7C1 is the only square in row 7 that can be <4>

R7C9 is the only square in row 7 that can be <7>

R9C7 can only be <1>

R9C9 can only be <5>

R8C7 is the only square in row 8 that can be <4>

R8C1 is the only square in row 8 that can be <5>

Intersection of block 7 with column 2. The value <3> only appears in one or more of squares R7C2, R8C2 and R9C2 of block 7. These squares are the ones that intersect with column 2. Thus, the other (non-intersecting) squares of column 2 cannot contain this value.

R3C2 - removing <3> from <136> leaving <16>

Squares R5C2 and R9C2 in column 2 and R5C8 and R9C8 in column 8 form a Simple X-Wing pattern on possibility <8>. All other instances of this possibility in rows 5 and 9 can be removed.

R5C1 - removing <8> from <189> leaving <19>

R5C3 - removing <8> from <389> leaving <39>

Squares R1C3<37>, R5C3<39> and R9C3<79> in column 3 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <379>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C3 - removing <7> from <678> leaving <68>

Squares R4C1 (XY), R3C1 (XZ) and R5C2 (YZ) form an XY-Wing pattern on <1>. All squares that are buddies of both the XZ and YZ squares cannot be <1>.

R5C1 - removing <1> from <19> leaving <9>

R3C2 - removing <1> from <16> leaving <6>

R7C2 can only be <3>

R2C3 can only be <8>

R5C3 can only be <3>

R9C1 can only be <7>

R5C7 can only be <6>

R1C3 can only be <7>

R4C1 can only be <8>

R5C8 can only be <8>

R2C7 can only be <7>

R5C2 can only be <1>

R9C8 can only be <3>

R4C9 can only be <3>

R7C8 can only be <6>

R9C2 can only be <8>

R8C9 can only be <8>

R8C3 can only be <6>

R9C3 can only be <9>

R1C7 can only be <3>

R3C9 can only be <1>

R2C1 can only be <1>

R3C1 can only be <3>

R2C9 can only be <6>



Today's Sudoku Puzzles 



All daily items change at midnight GMT – set your local time zone.

Note: BrainBashers has a Dark Mode setting.