Daily Sudoku Answer 

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R4C9 can only be <1>

R4C2 can only be <8>

R1C5 is the only square in row 1 that can be <7>

R2C3 is the only square in row 2 that can be <9>

R1C9 is the only square in row 1 that can be <9>

R3C5 is the only square in row 3 that can be <3>

R3C2 is the only square in row 3 that can be <6>

R8C6 is the only square in row 8 that can be <9>

R9C1 is the only square in row 9 that can be <5>

R9C6 is the only square in column 6 that can be <1>

R3C9 is the only square in column 9 that can be <2>

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.

R7C1 - removing <1> from <1248> leaving <248>

R8C3 - removing <1> from <147> leaving <47>

Intersection of column 7 with block 3. The value <5> only appears in one or more of squares R1C7, R2C7 and R3C7 of column 7. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R2C8 - removing <5> from <458> leaving <48>

Intersection of column 9 with block 9. The value <8> only appears in one or more of squares R7C9, R8C9 and R9C9 of column 9. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R7C8 - removing <8> from <148> leaving <14>

Squares R2C8<48>, R3C8<18> and R7C8<14> in column 8 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <148>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C8 - removing <4> from <457> leaving <57>

R8C8 - removing <14> from <1347> leaving <37>

Squares R5C5<26>, R7C5<246> and R9C5<46> in column 5 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <246>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C5 - removing <6> from <569> leaving <59>

R6C9 is the only square in row 6 that can be <6>

R7C5 is the only square in row 7 that can be <6>

R5C5 can only be <2>

R9C5 can only be <4>

R9C4 can only be <3>

R8C4 can only be <2>

R9C7 can only be <6>

Intersection of row 6 with block 4. The value <4> only appears in one or more of squares R6C1, R6C2 and R6C3 of row 6. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.

R5C1 - removing <4> from <134> leaving <13>

R5C3 - removing <4> from <147> leaving <17>

Squares R5C3 and R5C9 in row 5 and R9C3 and R9C9 in row 9 form a Simple X-Wing pattern on possibility <7>. All other instances of this possibility in columns 3 and 9 can be removed.

R8C3 - removing <7> from <47> leaving <4>

Squares R1C3 and R3C1 in block 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <18>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R1C1 - removing <18> from <1248> leaving <24>

Squares R5C4, R5C6, R2C4 and R2C6 form a Type-3 Unique Rectangle on <68>. Upon close inspection, it is clear that:

(R2C4 or R2C6)<25>, R2C7<45> and R2C2<24> form a naked triplet on <245> in row 2. No other squares in the row can contain these possibilities

R2C8 - removing <4> from <48> leaving <8>

R3C8 can only be <1>

R3C1 can only be <8>

R7C8 can only be <4>

R7C9 can only be <8>

R7C1 can only be <2>

R9C9 can only be <7>

R9C3 can only be <8>

R5C9 can only be <4>

R8C8 can only be <3>

R1C3 can only be <1>

R5C7 can only be <3>

R7C2 can only be <1>

R1C1 can only be <4>

R8C2 can only be <7>

R6C2 can only be <4>

R8C7 can only be <1>

R4C8 can only be <5>

R1C7 can only be <5>

R6C1 can only be <9>

R2C2 can only be <2>

R5C3 can only be <7>

R1C4 can only be <8>

R2C7 can only be <4>

R2C6 can only be <6>

R2C4 can only be <5>

R5C6 can only be <8>

R4C5 can only be <9>

R6C8 can only be <7>

R5C4 can only be <6>

R1C6 can only be <2>

R5C1 can only be <1>

R6C5 can only be <5>

R4C1 can only be <3>

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