Jun 29 - Super Hard
Puzzle Copyright © Kevin Stone
Share link – www.brainbashers.com
Reasoning
R3C5 can only be <1>
R4C4 can only be <6>
R4C5 can only be <9>
R4C6 can only be <8>
R5C3 can only be <3>
R5C4 can only be <2>
R5C7 can only be <9>
R6C4 can only be <1>
R6C6 can only be <3>
R7C5 can only be <5>
R6C5 can only be <7>
R5C6 can only be <5>
R5C5 can only be <4>
R7C7 can only be <4>
R3C7 can only be <3>
R9C1 is the only square in row 9 that can be <7>
Squares R9C3<15>, R9C7<25> and R9C8<125> in row 9 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <125>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R9C2 - removing <5> from <359> leaving <39>
R9C9 - removing <1> from <139> leaving <39>
Squares R8C1 and R9C2 in block 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <39>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
R8C2 - removing <39> from <3589> leaving <58>
Squares R8C2 and R8C8 in row 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <58>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
R8C9 - removing <8> from <389> leaving <39>
Squares R2C2 and R2C8 in row 2 and R8C2 and R8C8 in row 8 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 2 and 8 can be removed.
R1C2 - removing <5> from <358> leaving <38>
R1C8 - removing <5> from <1258> leaving <128>
R9C8 - removing <5> from <125> leaving <12>
Squares R3C3 and R3C9 in row 3 and R7C3 and R7C9 in row 7 form a Simple X-Wing pattern on possibility <8>. All other instances of this possibility in columns 3 and 9 can be removed.
R1C3 - removing <8> from <158> leaving <15>
R1C9 - removing <8> from <148> leaving <14>
Squares R1C3 and R9C3 in column 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <15>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
R7C3 - removing <1> from <168> leaving <68>
Squares R2C8 (XY), R9C8 (XZ) and R1C7 (YZ) form an XY-Wing pattern on <2>. All squares that are buddies of both the XZ and YZ squares cannot be <2>.
R1C8 - removing <2> from <128> leaving <18>
R9C7 - removing <2> from <25> leaving <5>
R9C3 can only be <1>
R1C7 can only be <2>
R8C8 can only be <8>
R8C2 can only be <5>
R1C8 can only be <1>
R7C9 can only be <1>
R9C8 can only be <2>
R1C3 can only be <5>
R7C1 can only be <6>
R2C2 can only be <9>
R1C9 can only be <4>
R2C8 can only be <5>
R2C9 can only be <6>
R1C1 can only be <3>
R9C2 can only be <3>
R2C1 can only be <1>
R3C9 can only be <8>
R3C3 can only be <6>
R7C3 can only be <8>
R3C1 can only be <4>
R9C9 can only be <9>
R1C2 can only be <8>
R8C1 can only be <9>
R8C9 can only be <3>
Today's Sudoku Puzzles
All daily items change at midnight GMT – set your local time zone.
Note: BrainBashers has a Dark Mode setting.