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Sudoku Solution Path

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R4C7 can only be <8>
R2C2 is the only square in row 2 that can be <4>
R2C5 is the only square in row 2 that can be <7>
R4C9 is the only square in row 4 that can be <1>
R5C2 is the only square in row 5 that can be <1>
R8C5 is the only square in row 8 that can be <1>
R6C1 is the only square in column 1 that can be <7>
R9C2 is the only square in column 2 that can be <5>
R3C5 is the only square in column 5 that can be <8>
R1C8 is the only square in row 1 that can be <8>
R3C6 is the only square in row 3 that can be <3>
R5C5 is the only square in row 5 that can be <3>
R8C9 is the only square in row 8 that can be <8>
R9C6 is the only square in row 9 that can be <8>
Intersection of row 1 with block 2. The value <6> only appears in one or more of squares R1C4, R1C5 and R1C6 of row 1. These squares are the ones that intersect with block 2. Thus, the other (non-intersecting) squares of block 2 cannot contain this value.
   R3C4 - removing <6> from <269> leaving <29>
Intersection of row 6 with block 6. The value <6> only appears in one or more of squares R6C7, R6C8 and R6C9 of row 6. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.
   R5C7 - removing <6> from <467> leaving <47>
   R5C8 - removing <6> from <267> leaving <27>
Intersection of row 8 with block 7. The value <2> only appears in one or more of squares R8C1, R8C2 and R8C3 of row 8. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.
   R7C3 - removing <2> from <269> leaving <69>
Intersection of block 3 with row 2. The value <2> only appears in one or more of squares R2C7, R2C8 and R2C9 of block 3. 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 <2> from <269> leaving <69>
Intersection of block 5 with column 5. The value <9> only appears in one or more of squares R4C5, R5C5 and R6C5 of block 5. These squares are the ones that intersect with column 5. Thus, the other (non-intersecting) squares of column 5 cannot contain this value.
   R7C5 - removing <9> from <259> leaving <25>
Squares R3C3 and R3C7 in row 3 and R7C3 and R7C7 in row 7 form a Simple X-Wing pattern on possibility <6>. All other instances of this possibility in columns 3 and 7 can be removed.
   R6C7 - removing <6> from <46> leaving <4>
R5C7 can only be <7>
R5C8 can only be <2>
R5C6 can only be <6>
R6C9 can only be <6>
R2C9 can only be <2>
R5C4 can only be <5>
R5C3 can only be <4>
R1C4 is the only square in row 1 that can be <6>
R4C3 is the only square in row 4 that can be <5>
R7C5 is the only square in row 7 that can be <5>
R7C4 is the only square in row 7 that can be <7>
R9C4 can only be <9>
R9C8 can only be <7>
R3C4 can only be <2>
R7C6 can only be <2>
R1C6 can only be <9>
R1C2 can only be <2>
R8C2 can only be <9>
R8C8 can only be <6>
R7C3 can only be <6>
R8C1 can only be <2>
R2C8 can only be <9>
R7C7 can only be <9>
R2C1 can only be <6>
R3C7 can only be <6>
R3C3 can only be <9>
R4C1 can only be <9>
R6C3 can only be <2>
R4C5 can only be <2>
R6C5 can only be <9>


 

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