Daily Sudoku Answer 

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R1C5 can only be <7>

R5C8 can only be <3>

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

R3C7 is the only square in row 3 that can be <7>

R3C8 is the only square in row 3 that can be <1>

R9C3 is the only square in row 9 that can be <4>

Squares R3C4 and R4C4 in column 4 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 column.

R5C4 - removing <8> from <178> leaving <17>

R6C4 - removing <5> from <357> leaving <37>

Intersection of row 8 with block 7. The value <7> only appears in one or more of squares R8C1, R8C2 and R8C3 of row 8. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.

R7C2 - removing <7> from <3567> leaving <356>

R7C3 - removing <7> from <1367> leaving <136>

Intersection of column 8 with block 9. The value <5> only appears in one or more of squares R7C8, R8C8 and R9C8 of column 8. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R7C7 - removing <5> from <12359> leaving <1239>

R8C7 - removing <5> from <1235> leaving <123>

Intersection of block 2 with row 3. The value <8> only appears in one or more of squares R3C4, R3C5 and R3C6 of block 2. These squares are the ones that intersect with row 3. Thus, the other (non-intersecting) squares of row 3 cannot contain this value.

R3C2 - removing <8> from <3568> leaving <356>

R3C3 - removing <8> from <2368> leaving <236>

Squares R1C3 and R1C7 in row 1, R4C3, R4C5 and R4C7 in row 4 and R6C3, R6C5 and R6C7 in row 6 form a Swordfish pattern on possibility <6>. All other instances of this possibility in columns 3, 5 and 7 can be removed.

R3C3 - removing <6> from <236> leaving <23>

R5C5 - removing <6> from <126> leaving <12>

R7C3 - removing <6> from <136> leaving <13>

Squares R5C5<12>, R8C5<123> and R9C5<13> in column 5 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <123>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C5 - removing <2> from <256> leaving <56>

R6C5 - removing <3> from <3456> leaving <456>

R6C4 is the only square in row 6 that can be <3>

Squares R9C5, R9C7, R8C5 and R8C7 form a Type-2 Unique Rectangle on <13>.

R8C8 - removing <2> from <25> leaving <5>

Squares R7C3<13>, R8C2<37> and R8C3<137> in block 7 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <137>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C2 - removing <3> from <356> leaving <56>

Squares R2C2 (XY), R7C2 (XZ) and R1C3 (YZ) form an XY-Wing pattern on <6>. All squares that are buddies of both the XZ and YZ squares cannot be <6>.

R3C2 - removing <6> from <356> leaving <35>

Squares R4C3 (XYZ), R1C3 (XZ) and R5C1 (YZ) form an XYZ-Wing pattern on <6>. All squares that are buddies of all three squares cannot be <6>.

R6C3 - removing <6> from <67> leaving <7>

R6C6 can only be <4>

R3C6 can only be <8>

R3C4 can only be <5>

R3C2 can only be <3>

R4C4 can only be <8>

R2C5 can only be <4>

R2C8 can only be <2>

R2C7 can only be <8>

R7C8 can only be <4>

R3C3 can only be <2>

R8C2 can only be <7>

R3C1 can only be <6>

R4C3 can only be <6>

R4C5 can only be <5>

R1C3 can only be <8>

R5C1 can only be <2>

R5C2 can only be <8>

R4C7 can only be <9>

R6C5 can only be <6>

R4C6 can only be <2>

R5C9 can only be <6>

R5C5 can only be <1>

R2C2 can only be <5>

R5C4 can only be <7>

R9C5 can only be <3>

R3C9 can only be <4>

R6C7 can only be <5>

R7C9 can only be <9>

R9C7 can only be <1>

R8C5 can only be <2>

R1C7 can only be <6>

R7C2 can only be <6>

R7C1 can only be <5>

R7C6 can only be <7>

R5C6 can only be <9>

R7C4 can only be <1>

R7C3 can only be <3>

R8C7 can only be <3>

R8C3 can only be <1>

R7C7 can only be <2>

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