Daily Sudoku Answer 

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R3C2 is the only square in row 3 that can be <4>

R2C4 is the only square in row 2 that can be <4>

R2C9 is the only square in row 2 that can be <2>

R1C4 is the only square in row 1 that can be <2>

R2C8 is the only square in row 2 that can be <1>

R4C2 is the only square in row 4 that can be <2>

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

R4C1 is the only square in row 4 that can be <6>

R4C6 is the only square in row 4 that can be <1>

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

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

Squares R7C7 and R9C7 in column 7 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.

R1C7 - removing <5> from <579> leaving <79>

R3C7 - removing <5> from <579> leaving <79>

R1C6 is the only square in row 1 that can be <5>

R3C5 can only be <7>

R3C7 can only be <9>

R2C5 can only be <6>

R3C8 can only be <5>

R1C7 can only be <7>

R1C3 can only be <9>

R2C6 can only be <9>

R7C8 is the only square in row 7 that can be <6>

R7C2 is the only square in row 7 that can be <3>

R5C1 is the only square in row 5 that can be <3>

R8C6 is the only square in row 8 that can be <6>

R8C8 is the only square in column 8 that can be <3>

R8C9 is the only square in row 8 that can be <9>

Intersection of block 7 with row 8. The value <5> only appears in one or more of squares R8C1, R8C2 and R8C3 of block 7. These squares are the ones that intersect with row 8. Thus, the other (non-intersecting) squares of row 8 cannot contain this value.

R8C4 - removing <5> from <578> leaving <78>

R8C5 - removing <5> from <158> leaving <18>

Squares R4C4 and R8C4 in column 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <78>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C4 - removing <78> from <3578> leaving <35>

R9C4 - removing <7> from <357> leaving <35>

Squares R6C1<17>, R6C4<35>, R6C6<37> and R6C9<15> in row 6 form a comprehensive naked quad. These 4 squares can only contain the 4 possibilities <1357>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C2 - removing <7> from <789> leaving <89>

R6C8 - removing <7> from <789> leaving <89>

Squares R2C1, R2C2, R8C1 and R8C2 form a Type-3 Unique Rectangle on <57>. Upon close inspection, it is clear that:

(R8C1 or R8C2)<18> and R7C3<18> form a naked pair on <18> in block 7. No other squares in the block can contain these possibilities

R9C3 - removing <1> from <17> leaving <7>

(R8C1 or R8C2)<18> and R8C5<18> form a naked pair on <18> in row 8. No other squares in the row can contain these possibilities

R8C4 - removing <8> from <78> leaving <7>

R4C4 can only be <8>

R9C6 can only be <3>

R9C4 can only be <5>

R6C6 can only be <7>

R4C8 can only be <7>

R5C5 can only be <5>

R5C9 can only be <1>

R6C4 can only be <3>

R5C3 can only be <8>

R6C9 can only be <5>

R6C1 can only be <1>

R9C7 can only be <1>

R7C7 can only be <5>

R5C8 can only be <9>

R7C3 can only be <1>

R6C2 can only be <9>

R5C2 can only be <7>

R6C8 can only be <8>

R8C1 can only be <5>

R7C5 can only be <8>

R8C5 can only be <1>

R8C2 can only be <8>

R2C1 can only be <7>

R2C2 can only be <5>

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