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 Sudoku Solution Path   R2C6 can only be <5> R4C8 can only be <1> R5C2 can only be <8> R5C4 can only be <6> R5C6 can only be <9> R6C8 can only be <6> R8C4 can only be <4> R8C5 can only be <3> R8C6 can only be <1> R2C5 can only be <6> R4C2 can only be <5> R5C8 can only be <4> R2C4 can only be <7> R6C5 can only be <5> R6C2 can only be <3> R4C5 can only be <8> R2C2 is the only square in row 2 that can be <1> R7C8 is the only square in row 7 that can be <3> R2C9 is the only square in row 2 that can be <3> R9C9 is the only square in row 9 that can be <1> Squares R1C2 and R1C9 in row 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R1C1 - removing <7> from <578> leaving <58>    R1C8 - removing <27> from <2578> leaving <58> Squares R3C3 and R7C3 in column 3 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 column.    R2C3 - removing <9> from <289> leaving <28>    R8C3 - removing <59> from <2589> leaving <28> Squares R8C9 and R9C8 in block 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.    R8C8 - removing <27> from <2579> leaving <59> Intersection of row 2 with block 3. The value <9> only appears in one or more of squares R2C7, R2C8 and R2C9 of row 2. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.    R3C7 - removing <9> from <459> leaving <45>    R3C8 - removing <9> from <579> leaving <57> Intersection of column 1 with block 7. The value <7> only appears in one or more of squares R7C1, R8C1 and R9C1 of column 1. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.    R8C2 - removing <7> from <2679> leaving <269>    R9C2 - removing <7> from <247> leaving <24> Squares R1C2 and R9C8 form a remote locked pair. <27> can be removed from any square that is common to their groups.    R9C2 - removing <2> from <24> leaving <4> R9C1 can only be <7> R9C8 can only be <2> R8C9 can only be <7> R1C9 can only be <2> R1C2 can only be <7> R3C2 can only be <9> R3C3 can only be <5> R7C2 can only be <6> R3C7 can only be <4> R3C8 can only be <7> R7C3 can only be <9> R1C1 can only be <8> R2C7 can only be <9> R8C2 can only be <2> R7C7 can only be <5> R8C8 can only be <9> R8C3 can only be <8> R8C1 can only be <5> R2C3 can only be <2> R8C7 can only be <6> R2C8 can only be <8> R1C8 can only be <5> R2C1 can only be <4>

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