Aug 26 - Hard
Puzzle Copyright © Kevin Stone
Share link – www.brainbashers.com
Reasoning
R4C7 can only be <1>
R1C7 is the only square in row 1 that can be <4>
R1C3 is the only square in row 1 that can be <6>
R1C1 is the only square in row 1 that can be <8>
R2C6 is the only square in row 2 that can be <6>
R3C7 is the only square in row 3 that can be <2>
R5C7 is the only square in row 5 that can be <6>
R7C1 is the only square in row 7 that can be <4>
R7C9 is the only square in row 7 that can be <6>
R7C7 is the only square in row 7 that can be <5>
R6C7 can only be <3>
R9C7 can only be <8>
Squares R4C2 and R4C8 in row 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R4C3 - removing <79> from <2789> leaving <28>
Intersection of row 1 with block 3. The value <3> only appears in one or more of squares R1C7, R1C8 and R1C9 of row 1. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.
R2C9 - removing <3> from <1357> leaving <157>
Intersection of row 9 with block 7. The values <27> only appears in one or more of squares R9C1, R9C2 and R9C3 of row 9. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain these values.
R7C3 - removing <7> from <1379> leaving <139>
R8C1 - removing <2> from <29> leaving <9>
R3C3 is the only square in row 3 that can be <9>
R5C3 can only be <2>
R5C4 can only be <1>
R4C3 can only be <8>
R5C6 can only be <4>
R6C5 can only be <8>
R6C3 can only be <7>
R4C5 can only be <2>
R6C8 can only be <5>
R4C2 can only be <9>
R6C2 can only be <4>
R5C8 can only be <9>
R4C8 can only be <7>
R5C2 can only be <5>
R3C5 is the only square in row 3 that can be <4>
R7C5 is the only square in row 7 that can be <9>
R8C4 is the only square in row 8 that can be <2>
R8C6 is the only square in row 8 that can be <8>
R3C4 is the only square in row 3 that can be <8>
R9C1 is the only square in row 9 that can be <2>
R9C2 is the only square in row 9 that can be <7>
R1C2 can only be <1>
R1C8 can only be <3>
R1C9 can only be <7>
R9C8 can only be <1>
R9C3 can only be <3>
R8C9 can only be <3>
R8C5 can only be <1>
R9C9 can only be <9>
R7C3 can only be <1>
R7C6 can only be <7>
R7C4 can only be <3>
R3C6 can only be <1>
R2C5 can only be <3>
R2C4 can only be <7>
R3C9 can only be <5>
R3C1 can only be <7>
R2C9 can only be <1>
R2C1 can only be <5>
Today's Sudoku Puzzles
All daily items change at midnight GMT – set your local time zone.
Note: BrainBashers has a Dark Mode setting.