Daily Sudoku Answer 

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R5C5 is the only square in row 5 that can be <1>

R7C3 is the only square in row 7 that can be <1>

R8C8 is the only square in row 8 that can be <6>

R8C5 is the only square in row 8 that can be <8>

R9C2 is the only square in row 9 that can be <7>

R1C2 is the only square in column 2 that can be <8>

R5C8 is the only square in column 8 that can be <7>

R4C6 is the only square in column 6 that can be <7>

Intersection of row 3 with block 1. The value <6> only appears in one or more of squares R3C1, R3C2 and R3C3 of row 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R1C3 - removing <6> from <269> leaving <29>

R3C3 is the only square in column 3 that can be <6>

Intersection of block 6 with column 9. The value <4> only appears in one or more of squares R4C9, R5C9 and R6C9 of block 6. These squares are the ones that intersect with column 9. Thus, the other (non-intersecting) squares of column 9 cannot contain this value.

R2C9 - removing <4> from <2459> leaving <259>

R7C9 - removing <4> from <2345> leaving <235>

Squares R3C1 and R3C9 in row 3 and R7C1 and R7C9 in row 7 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 1 and 9 can be removed.

R2C1 - removing <5> from <2579> leaving <279>

R2C9 - removing <5> from <259> leaving <29>

R6C1 - removing <5> from <569> leaving <69>

R6C6 is the only square in row 6 that can be <5>

R5C6 can only be <3>

R9C6 can only be <4>

R1C6 can only be <6>

R7C7 is the only square in row 7 that can be <4>

Squares R1C4 and R1C7 in row 1 and R9C4 and R9C7 in row 9 form a Simple X-Wing pattern on possibility <3>. All other instances of this possibility in columns 4 and 7 can be removed.

R3C7 - removing <3> from <38> leaving <8>

R5C7 can only be <9>

R4C9 can only be <4>

R6C9 can only be <8>

R5C4 is the only square in row 5 that can be <8>

Squares R9C4 and R9C7 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C3 - removing <2> from <259> leaving <59>

Squares R5C2 and R5C3 in block 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <25>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R4C1 - removing <2> from <269> leaving <69>

Squares R4C1 and R6C1 in column 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 column.

R2C1 - removing <9> from <279> leaving <27>

R8C1 - removing <9> from <239> leaving <23>

Squares R1C3 and R1C8 in row 1 and R9C3 and R9C8 in row 9 form a Simple X-Wing pattern on possibility <9>. All other instances of this possibility in columns 3 and 8 can be removed.

R2C8 - removing <9> from <459> leaving <45>

Squares R8C2 (XY), R5C2 (XZ) and R9C3 (YZ) form an XY-Wing pattern on <5>. All squares that are buddies of both the XZ and YZ squares cannot be <5>.

R5C3 - removing <5> from <25> leaving <2>

R5C2 can only be <5>

R1C3 can only be <9>

R1C8 can only be <4>

R9C3 can only be <5>

R1C4 can only be <3>

R2C8 can only be <5>

R2C2 can only be <2>

R9C8 can only be <9>

R3C9 can only be <3>

R3C5 can only be <7>

R1C7 can only be <2>

R8C9 can only be <2>

R9C4 can only be <2>

R9C7 can only be <3>

R2C9 can only be <9>

R2C1 can only be <7>

R8C2 can only be <9>

R3C1 can only be <5>

R2C5 can only be <4>

R8C1 can only be <3>

R7C9 can only be <5>

R4C4 can only be <6>

R7C5 can only be <3>

R6C5 can only be <9>

R4C1 can only be <9>

R6C4 can only be <4>

R6C1 can only be <6>

R4C5 can only be <2>

R7C1 can only be <2>

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