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Sudoku Solution Path

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R7C8 can only be <6>
R1C8 can only be <1>
R8C9 can only be <5>
R7C7 can only be <8>
R1C5 is the only square in row 1 that can be <5>
R3C7 is the only square in row 3 that can be <3>
R3C8 is the only square in row 3 that can be <7>
R5C8 can only be <2>
R7C1 is the only square in row 7 that can be <7>
R7C4 is the only square in column 4 that can be <1>
R4C6 is the only square in column 6 that can be <4>
Squares R2C1 and R2C7 in row 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <46>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R2C4 - removing <6> from <268> leaving <28>
   R2C9 - removing <46> from <2468> leaving <28>
Squares R9C2 and R9C5 in row 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R9C1 - removing <6> from <468> leaving <48>
   R9C3 - removing <26> from <2468> leaving <48>
Squares R4C5 and R9C5 in column 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R5C5 - removing <6> from <367> leaving <37>
   R6C5 - removing <26> from <2367> leaving <37>
Squares R1C9 and R6C9 in column 9 form a simple locked 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.
   R3C9 - removing <6> from <2468> leaving <248>
   R4C9 - removing <6> from <16> leaving <1>
   R5C9 - removing <69> from <1469> leaving <14>
R5C9 can only be <4>
R3C3 is the only square in row 3 that can be <4>
R9C3 can only be <8>
R2C1 can only be <6>
R9C1 can only be <4>
R2C7 can only be <4>
R8C1 can only be <1>
R3C2 can only be <5>
R5C1 can only be <3>
R5C5 can only be <7>
R6C1 can only be <5>
R6C5 can only be <3>
R4C1 can only be <8>
R4C7 is the only square in row 4 that can be <5>
R5C3 is the only square in row 5 that can be <1>
R6C7 is the only square in row 6 that can be <7>
R7C3 is the only square in row 7 that can be <5>
Squares R4C3 and R9C2 form a remote locked pair. <26> can be removed from any square that is common to their groups.
   R5C2 - removing <6> from <69> leaving <9>
   R8C3 - removing <6> from <69> leaving <9>
R5C7 can only be <6>
R7C2 can only be <2>
R1C7 can only be <9>
R6C9 can only be <9>
R1C9 can only be <6>
R7C6 can only be <9>
R9C2 can only be <6>
R8C6 can only be <6>
R3C6 can only be <2>
R9C5 can only be <2>
R4C5 can only be <6>
R3C9 can only be <8>
R2C4 can only be <8>
R3C4 can only be <6>
R2C9 can only be <2>
R4C3 can only be <2>
R6C4 can only be <2>
R6C3 can only be <6>


 

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