     Sudoku Solution Path   Puzzle Copyright © Kevin Stone R2C3 can only be <2> R9C2 can only be <8> R7C2 can only be <5> R4C2 can only be <6> R8C1 can only be <2> R7C1 can only be <3> R5C2 can only be <4> R3C2 can only be <9> R9C1 can only be <7> R2C5 is the only square in row 2 that can be <3> R3C8 is the only square in row 3 that can be <2> R3C5 is the only square in row 3 that can be <7> R4C4 is the only square in row 4 that can be <7> R5C5 is the only square in row 5 that can be <2> R5C9 is the only square in row 5 that can be <7> R6C5 is the only square in row 6 that can be <1> R7C9 is the only square in row 7 that can be <1> R7C7 is the only square in row 7 that can be <2> R9C9 is the only square in row 9 that can be <3> R8C7 is the only square in column 7 that can be <4> R6C9 is the only square in column 9 that can be <5> R5C4 is the only square in column 4 that can be <5> R2C4 is the only square in column 4 that can be <9> Intersection of row 4 with block 5. The value <9> 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.    R5C6 - removing <9> from <369> leaving <36> Intersection of column 7 with block 6. The value <8> only appears in one or more of squares R4C7, R5C7 and R6C7 of column 7. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.    R5C8 - removing <8> from <3689> leaving <369>    R6C8 - removing <8> from <368> leaving <36> Intersection of column 9 with block 3. The values <46> only appears in one or more of squares R1C9, R2C9 and R3C9 of column 9. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain these values.    R1C8 - removing <6> from <689> leaving <89> Squares R2C1, R2C9, R1C1 and R1C9 form a Type-3 Unique Rectangle on <46>. Upon close inspection, it is clear that: (R1C1 or R1C9)<589>, R1C8<89> and R1C3<58> form a locked triplet on <589> in row 1. No other squares in the row can contain these possibilities    R1C5 - removing <5> from <45> leaving <4> R3C6 can only be <5> R8C6 can only be <9> R8C9 can only be <8> R4C6 can only be <3> R9C5 can only be <6> R8C5 can only be <5> R3C9 can only be <4> R7C8 can only be <6> R9C7 can only be <9> R7C5 can only be <8> R2C9 can only be <6> R5C6 can only be <6> R5C7 can only be <8> R6C6 can only be <4> R5C1 can only be <1> R6C7 can only be <6> R6C4 can only be <8> R6C8 can only be <3> R5C8 can only be <9> R7C4 can only be <4> R4C5 can only be <9> R2C1 can only be <4> R1C9 can only be <9> R5C3 can only be <3> R3C1 can only be <8> R1C8 can only be <8> R1C3 can only be <5> R3C3 can only be <1> R4C1 can only be <5> R4C3 can only be <8> R1C1 can only be <6> [Puzzle Code = Sudoku-20200812-SuperHard-049591]    