Daily Sudoku Answer 

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R3C7 can only be <6>

R3C3 is the only square in row 3 that can be <9>

R4C8 is the only square in row 4 that can be <5>

R4C2 is the only square in row 4 that can be <4>

R4C4 is the only square in row 4 that can be <2>

R2C5 is the only square in row 2 that can be <2>

R4C9 is the only square in row 4 that can be <8>

R6C2 is the only square in row 6 that can be <2>

R5C7 is the only square in row 5 that can be <2>

R6C8 is the only square in row 6 that can be <4>

R6C4 is the only square in row 6 that can be <8>

R5C2 is the only square in row 5 that can be <8>

R6C6 is the only square in row 6 that can be <6>

R5C8 is the only square in row 5 that can be <6>

R7C8 is the only square in row 7 that can be <9>

R8C3 is the only square in column 3 that can be <4>

R2C7 is the only square in column 7 that can be <4>

Squares R4C6 and R8C6 in column 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <13>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C6 - removing <3> from <347> leaving <47>

R2C6 - removing <3> from <379> leaving <79>

R9C6 - removing <13> from <1349> leaving <49>

Squares R5C9 and R6C9 in column 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <19>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C9 - removing <1> from <137> leaving <37>

R8C9 - removing <1> from <137> leaving <37>

R1C8 is the only square in block 3 that can be <1>

Intersection of column 2 with block 7. The value <1> only appears in one or more of squares R7C2, R8C2 and R9C2 of column 2. 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 <1> from <13> leaving <3>

R8C1 - removing <1> from <1357> leaving <357>

Intersection of column 2 with block 1. The value <3> only appears in one or more of squares R1C2, R2C2 and R3C2 of column 2. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R2C1 - removing <3> from <1357> leaving <157>

Squares R8C6<13>, R9C4<39>, R9C5<134> and R9C6<49> in block 8 form a comprehensive naked quad. These 4 squares can only contain the 4 possibilities <1349>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C5 - removing <1> from <158> leaving <58>

R8C4 - removing <3> from <356> leaving <56>

R8C5 - removing <13> from <13568> leaving <568>

Squares R3C2 and R3C5 in row 3 and R7C2 and R7C5 in row 7 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 2 and 5 can be removed.

R8C5 - removing <5> from <568> leaving <68>

Squares R3C2 and R3C8 in row 3 and R9C2 and R9C8 in row 9 form a Simple X-Wing pattern on possibility <7>. All other instances of this possibility in columns 2 and 8 can be removed.

R1C2 - removing <7> from <37> leaving <3>

R1C4 can only be <6>

R1C5 can only be <4>

R8C4 can only be <5>

R1C6 can only be <7>

R2C6 can only be <9>

R9C6 can only be <4>

R8C1 can only be <7>

R2C4 can only be <3>

R7C5 can only be <8>

R2C9 can only be <7>

R9C4 can only be <9>

R3C5 can only be <5>

R2C3 can only be <1>

R8C9 can only be <3>

R3C8 can only be <3>

R3C2 can only be <7>

R9C8 can only be <7>

R7C7 can only be <1>

R8C5 can only be <6>

R7C2 can only be <5>

R8C7 can only be <8>

R9C2 can only be <1>

R8C6 can only be <1>

R9C5 can only be <3>

R5C5 can only be <1>

R2C1 can only be <5>

R5C3 can only be <7>

R5C9 can only be <9>

R4C6 can only be <3>

R5C1 can only be <3>

R6C9 can only be <1>

R6C1 can only be <9>

R4C1 can only be <1>

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