Aug 14 - Hard
Puzzle Copyright © Kevin Stone
Share link – www.brainbashers.com
Reasoning
R4C8 is the only square in row 4 that can be <8>
R3C3 is the only square in column 3 that can be <4>
R6C7 is the only square in column 7 that can be <4>
R5C8 is the only square in column 8 that can be <6>
R5C9 is the only square in column 9 that can be <2>
Squares R1C1 and R1C2 in row 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R1C5 - removing <9> from <1459> leaving <145>
R1C8 - removing <9> from <1459> leaving <145>
Squares R1C1 and R1C2 in block 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
R2C1 - removing <69> from <2679> leaving <27>
R2C2 - removing <69> from <2679> leaving <27>
Squares R2C1 and R2C2 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R2C4 - removing <2> from <12469> leaving <1469>
R2C5 - removing <2> from <1249> leaving <149>
R2C6 - removing <2> from <269> leaving <69>
Intersection of row 7 with block 8. The value <8> only appears in one or more of squares R7C4, R7C5 and R7C6 of row 7. 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 <8> from <2478> leaving <247>
R8C6 - removing <8> from <238> leaving <23>
R9C5 - removing <8> from <2489> leaving <249>
Intersection of row 9 with block 7. The value <6> 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 this value.
R7C3 - removing <6> from <67> leaving <7>
R5C3 can only be <1>
R6C3 can only be <2>
R6C6 can only be <5>
R4C3 can only be <6>
R4C7 is the only square in column 7 that can be <1>
R6C8 can only be <3>
R6C2 can only be <7>
R5C7 can only be <5>
R3C7 can only be <9>
R6C4 can only be <1>
R2C2 can only be <2>
R5C1 can only be <9>
R2C1 can only be <7>
R3C4 can only be <2>
R7C7 can only be <3>
R5C2 can only be <3>
R5C5 can only be <7>
R1C1 can only be <6>
R4C2 can only be <5>
R1C2 can only be <9>
R9C1 can only be <2>
R3C6 can only be <8>
R4C4 can only be <9>
R3C5 can only be <5>
R8C2 can only be <8>
R4C6 can only be <2>
R7C4 can only be <6>
R8C6 can only be <3>
R7C6 can only be <9>
R2C4 can only be <4>
R7C5 can only be <8>
R2C6 can only be <6>
R9C2 can only be <6>
R9C5 can only be <4>
R8C1 can only be <5>
R9C8 can only be <9>
R9C9 can only be <8>
R8C5 can only be <2>
R8C4 can only be <7>
R2C8 can only be <1>
R2C5 can only be <9>
R2C9 can only be <3>
R8C8 can only be <4>
R1C9 can only be <4>
R1C5 can only be <1>
R8C9 can only be <1>
R1C8 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 option – I recommend not using your browser's dark mode or extensions for BrainBashers