Dec 06 - Hard
Puzzle Copyright © Kevin Stone
Share link – www.brainbashers.com
Reasoning
R1C8 can only be <9>
R9C8 can only be <6>
R9C9 can only be <3>
R8C9 can only be <8>
R7C7 can only be <2>
R2C4 is the only square in row 2 that can be <1>
R1C2 is the only square in row 1 that can be <1>
R2C5 is the only square in row 2 that can be <2>
R2C9 is the only square in row 2 that can be <7>
R7C3 is the only square in column 3 that can be <5>
R7C5 can only be <3>
R7C4 can only be <8>
R7C6 can only be <7>
R3C6 is the only square in row 3 that can be <8>
R1C1 is the only square in row 1 that can be <8>
R8C1 is the only square in row 8 that can be <7>
R8C4 is the only square in row 8 that can be <2>
Squares R9C1 and R9C2 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R9C6 - removing <4> from <459> leaving <59>
Squares R2C6 and R8C6 in column 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <46>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
R1C6 - removing <4> from <345> leaving <35>
R5C6 - removing <6> from <369> leaving <39>
R1C9 is the only square in row 1 that can be <4>
R3C7 can only be <5>
Intersection of block 5 with row 5. The value <3> only appears in one or more of squares R5C4, R5C5 and R5C6 of block 5. These squares are the ones that intersect with row 5. Thus, the other (non-intersecting) squares of row 5 cannot contain this value.
R5C2 - removing <3> from <34> leaving <4>
R5C7 - removing <3> from <349> leaving <49>
R5C7 can only be <9>
R9C2 can only be <2>
R5C6 can only be <3>
R6C7 can only be <3>
R4C7 can only be <4>
R9C1 can only be <4>
R6C2 can only be <8>
R5C4 can only be <6>
R1C6 can only be <5>
R6C8 can only be <7>
R4C2 can only be <3>
R6C3 can only be <6>
R5C8 can only be <1>
R2C1 can only be <6>
R1C4 can only be <3>
R9C6 can only be <9>
R2C6 can only be <4>
R4C1 can only be <9>
R3C3 can only be <4>
R8C6 can only be <6>
R6C1 can only be <2>
R3C4 can only be <9>
R4C5 can only be <5>
R5C3 can only be <7>
R4C8 can only be <8>
R6C9 can only be <5>
R4C3 can only be <1>
R6C5 can only be <9>
R4C9 can only be <6>
R8C5 can only be <4>
R9C4 can only be <5>
R3C5 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.