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 Sudoku Solution Path   R1C3 can only be <3> R3C3 can only be <7> R4C2 can only be <2> R5C3 can only be <8> R1C2 is the only square in row 1 that can be <5> R2C1 is the only square in row 2 that can be <2> R3C9 is the only square in row 3 that can be <5> R7C7 is the only square in row 7 that can be <1> R8C1 is the only square in row 8 that can be <8> Squares R7C1 and R7C9 in row 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <67>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R7C5 - removing <7> from <279> leaving <29> Squares R1C7 and R3C7 in column 7 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 column.    R5C7 - removing <4> from <234> leaving <23>    R9C7 - removing <4> from <234> leaving <23> Squares R1C7 and R3C7 in block 3 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 block.    R1C8 - removing <4> from <14> leaving <1>    R2C9 - removing <6> from <367> leaving <37> Intersection of column 4 with block 5. The value <4> only appears in one or more of squares R4C4, R5C4 and R6C4 of column 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.    R4C5 - removing <4> from <4689> leaving <689>    R5C5 - removing <4> from <1247> leaving <127> Intersection of block 8 with column 5. The value <9> only appears in one or more of squares R7C5, R8C5 and R9C5 of block 8. These squares are the ones that intersect with column 5. Thus, the other (non-intersecting) squares of column 5 cannot contain this value.    R4C5 - removing <9> from <689> leaving <68> Squares R1C5, R1C7, R3C5 and R3C7 form a Type-1 Unique Rectangle on <46>.    R3C5 - removing <46> from <146> leaving <1> R3C1 can only be <6> R2C4 can only be <9> R2C6 can only be <6> R4C4 can only be <4> R2C2 can only be <1> R4C6 can only be <9> R1C5 can only be <4> R3C7 can only be <4> R7C1 can only be <7> R1C7 can only be <6> R4C8 can only be <8> R4C5 can only be <6> R7C9 can only be <6> R5C1 can only be <1> R9C2 can only be <4> R8C2 can only be <6> R6C2 can only be <7> R6C6 can only be <3> R6C8 can only be <2> R6C4 can only be <1> R6C5 can only be <8> R5C7 can only be <3> R5C9 can only be <4> R9C7 can only be <2> R8C9 can only be <7> R8C6 can only be <5> R8C8 can only be <4> R2C9 can only be <3> R9C8 can only be <3> R9C3 can only be <9> R2C8 can only be <7> R8C4 can only be <2> R5C6 can only be <7> R9C5 can only be <7> R7C3 can only be <2> R5C5 can only be <2> R5C4 can only be <5> R7C5 can only be <9>

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