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Sudoku Solution Path

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R2C8 is the only square in row 2 that can be <3>
R7C4 is the only square in row 7 that can be <7>
R7C6 is the only square in row 7 that can be <3>
R8C2 is the only square in row 8 that can be <3>
R9C8 is the only square in row 9 that can be <6>
R3C3 is the only square in column 3 that can be <1>
R5C9 is the only square in column 9 that can be <7>
Intersection of row 1 with block 1. The value <5> only appears in one or more of squares R1C1, R1C2 and R1C3 of row 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.
   R3C1 - removing <5> from <2456> leaving <246>
R5C1 is the only square in column 1 that can be <5>
Squares R4C3 and R6C3 in column 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R1C3 - removing <4> from <2459> leaving <259>
   R7C3 - removing <48> from <2489> leaving <29>
   R9C3 - removing <8> from <589> leaving <59>
Squares R9C2 and R9C3 in row 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <59>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R9C5 - removing <9> from <189> leaving <18>
   R9C7 - removing <9> from <189> leaving <18>
Squares R2C4, R5C4 and R8C4 in column 4 form a simple locked triplet. These 3 squares all contain the 3 possibilities <189>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R3C4 - removing <9> from <59> leaving <5>
   R4C4 - removing <18> from <1348> leaving <34>
   R6C4 - removing <8> from <3458> leaving <345>
R6C6 is the only square in row 6 that can be <5>
R6C2 is the only square in row 6 that can be <6>
R2C2 can only be <9>
R9C2 can only be <5>
R9C3 can only be <9>
R1C2 can only be <4>
R7C3 can only be <2>
R4C2 can only be <7>
R1C3 can only be <5>
R4C6 is the only square in row 4 that can be <6>
R6C5 is the only square in row 6 that can be <7>
R7C7 is the only square in row 7 that can be <9>
R3C6 is the only square in row 3 that can be <9>
R1C8 is the only square in row 1 that can be <9>
R8C4 is the only square in row 8 that can be <9>
R5C5 is the only square in row 5 that can be <9>
R2C6 is the only square in column 6 that can be <2>
R2C1 can only be <6>
R1C5 can only be <8>
R1C7 can only be <2>
R9C5 can only be <1>
R2C4 can only be <1>
R3C7 can only be <4>
R2C9 can only be <8>
R3C1 can only be <2>
R5C4 can only be <8>
R7C9 can only be <4>
R3C9 can only be <6>
R5C6 can only be <1>
R8C6 can only be <8>
R4C5 can only be <2>
R7C1 can only be <8>
R8C9 can only be <2>
R8C1 can only be <4>
R8C8 can only be <1>
R9C7 can only be <8>
R6C7 can only be <3>
R6C4 can only be <4>
R4C7 can only be <1>
R4C8 can only be <8>
R4C3 can only be <4>
R6C8 can only be <2>
R6C3 can only be <8>
R4C4 can only be <3>


 

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