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 Sudoku Solution Path   R7C3 can only be <1> R7C9 is the only square in row 7 that can be <8> R9C3 is the only square in column 3 that can be <6> Intersection of row 4 with block 5. The value <4> only appears in one or more of squares R4C4, R4C5 and R4C6 of row 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.    R5C5 - removing <4> from <12346> leaving <1236>    R5C6 - removing <4> from <1467> leaving <167> Squares R5C6, R5C7 and R5C9 in row 5 form a simple locked triplet. These 3 squares all contain the 3 possibilities <167>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R5C1 - removing <1> from <1348> leaving <348>    R5C4 - removing <7> from <2378> leaving <238>    R5C5 - removing <16> from <1236> leaving <23> Intersection of column 1 with block 1. The value <1> only appears in one or more of squares R1C1, R2C1 and R3C1 of column 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.    R2C2 - removing <1> from <1237> leaving <237> Intersection of column 3 with block 1. The value <2> only appears in one or more of squares R1C3, R2C3 and R3C3 of column 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.    R1C2 - removing <2> from <2578> leaving <578>    R2C2 - removing <2> from <237> leaving <37> Intersection of block 2 with row 2. The value <7> only appears in one or more of squares R2C4, R2C5 and R2C6 of block 2. These squares are the ones that intersect with row 2. Thus, the other (non-intersecting) squares of row 2 cannot contain this value.    R2C1 - removing <7> from <1347> leaving <134>    R2C2 - removing <7> from <37> leaving <3>    R2C8 - removing <7> from <12467> leaving <1246>    R2C9 - removing <7> from <1367> leaving <136> R4C2 can only be <1> R6C2 can only be <8> R6C4 can only be <5> R8C4 can only be <3> R4C4 can only be <7> R4C8 can only be <9> R2C4 can only be <2> R4C6 can only be <4> R5C4 can only be <8> R3C5 can only be <4> R3C3 can only be <2> R1C5 can only be <6> R4C5 can only be <3> R5C5 can only be <2> R2C6 can only be <7> R1C3 can only be <4> R5C3 can only be <3> R2C1 can only be <1> R2C9 can only be <6> R3C1 can only be <7> R2C8 can only be <4> R3C7 can only be <1> R1C2 can only be <5> R3C9 can only be <3> R5C1 can only be <4> R1C1 can only be <8> R8C2 can only be <2> R9C2 can only be <7> R7C7 is the only square in row 7 that can be <7> R5C7 can only be <6> R5C6 can only be <1> R6C8 can only be <1> R6C5 can only be <9> R8C8 can only be <6> R9C8 can only be <2> R5C9 can only be <7> R9C7 can only be <9> R1C8 can only be <7> R1C9 can only be <9> R1C7 can only be <2> R8C6 can only be <9> R6C6 can only be <6> R7C5 can only be <5> R7C1 can only be <9> R9C5 can only be <1> R8C1 can only be <5> R9C9 can only be <5> R9C1 can only be <3> R8C9 can only be <1>

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