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 Sudoku Solution Path   R2C5 is the only square in row 2 that can be <3> R2C3 is the only square in row 2 that can be <9> R3C4 is the only square in row 3 that can be <9> R6C3 is the only square in row 6 that can be <1> R7C9 is the only square in row 7 that can be <9> R6C7 is the only square in row 6 that can be <9> R3C5 is the only square in column 5 that can be <4> R3C6 is the only square in row 3 that can be <1> R1C7 is the only square in row 1 that can be <1> R7C5 is the only square in row 7 that can be <1> R9C6 is the only square in column 6 that can be <2> Squares R1C4 and R1C6 in row 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R1C1 - removing <6> from <256> leaving <25>    R1C9 - removing <6> from <2456> leaving <245> R3C1 is the only square in column 1 that can be <6> R3C8 can only be <2> R6C9 is the only square in column 9 that can be <2> R6C4 is the only square in row 6 that can be <4> R1C1 is the only square in column 1 that can be <2> Squares R5C5 and R5C8 in row 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R5C2 - removing <8> from <2578> leaving <257>    R5C7 - removing <68> from <568> leaving <5> Squares R5C2 and R5C3 in block 4 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.    R4C1 - removing <7> from <3578> leaving <358>    R4C3 - removing <7> from <357> leaving <35> 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.    R7C2 - removing <7> from <4578> leaving <458>    R8C2 - removing <7> from <278> leaving <28>    R8C3 - removing <7> from <237> leaving <23>    R9C3 - removing <7> from <347> leaving <34> R8C7 is the only square in row 8 that can be <7> R2C2 is the only square in row 2 that can be <7> R3C2 can only be <5> R5C2 can only be <2> R3C9 can only be <7> R1C3 can only be <4> R5C3 can only be <7> R8C2 can only be <8> R8C5 can only be <6> R7C2 can only be <4> R8C8 can only be <3> R5C5 can only be <8> R8C3 can only be <2> R1C9 can only be <5> R9C3 can only be <3> R5C8 can only be <6> R6C6 can only be <3> R2C8 can only be <4> R4C9 can only be <4> R6C1 can only be <8> R7C8 can only be <8> R7C6 can only be <7> R9C1 can only be <7> R4C3 can only be <5> R2C7 can only be <6> R4C7 can only be <8> R9C9 can only be <6> R4C1 can only be <3> R7C1 can only be <5> R7C4 can only be <3> R4C6 can only be <6> R9C4 can only be <8> R1C4 can only be <6> R9C7 can only be <4> R1C6 can only be <8> R4C4 can only be <7>

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