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Sudoku Solution Path

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R3C7 can only be <2>
R4C8 can only be <3>
R2C7 can only be <3>
R1C6 is the only square in row 1 that can be <3>
R1C8 is the only square in row 1 that can be <7>
R3C4 is the only square in row 3 that can be <1>
R5C3 is the only square in row 5 that can be <7>
R5C1 is the only square in row 5 that can be <3>
R8C3 is the only square in row 8 that can be <3>
R5C7 is the only square in column 7 that can be <5>
R4C2 is the only square in column 2 that can be <5>
R6C1 is the only square in block 4 that can be <4>
Squares R5C4 and R5C6 in row 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R5C2 - removing <9> from <189> leaving <18>
   R5C9 - removing <9> from <1489> leaving <148>
Squares R1C4 and R5C4 in column 4 form a simple locked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R2C4 - removing <69> from <24569> leaving <245>
   R7C4 - removing <69> from <2679> leaving <27>
   R8C4 - removing <9> from <4579> leaving <457>
   R9C4 - removing <69> from <2469> leaving <24>
Squares R9C4 and R9C8 in row 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R9C6 - removing <24> from <2469> leaving <69>
Squares R5C6 and R9C6 in column 6 form a simple locked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R2C6 - removing <69> from <245689> leaving <2458>
   R3C6 - removing <6> from <4568> leaving <458>
   R7C6 - removing <69> from <2689> leaving <28>
   R8C6 - removing <9> from <4589> leaving <458>
R7C1 is the only square in row 7 that can be <6>
R3C9 is the only square in row 3 that can be <6>
R2C9 can only be <8>
R2C5 is the only square in row 2 that can be <6>
R1C4 can only be <9>
R1C5 can only be <8>
R5C4 can only be <6>
R1C2 can only be <6>
R5C6 can only be <9>
R9C6 can only be <6>
Squares R8C5 and R8C7 in row 8 form a simple locked pair. These 2 squares both contain the 2 possibilities <19>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R8C1 - removing <19> from <189> leaving <8>
   R8C9 - removing <19> from <1479> leaving <47>
R3C1 can only be <5>
R7C3 can only be <9>
R3C6 can only be <4>
R2C1 can only be <9>
R3C3 can only be <8>
R8C6 can only be <5>
R7C7 can only be <1>
R2C3 can only be <4>
R9C2 can only be <1>
R8C7 can only be <9>
R2C6 can only be <2>
R8C5 can only be <1>
R9C5 can only be <9>
R5C2 can only be <8>
R4C1 can only be <1>
R2C4 can only be <5>
R7C6 can only be <8>
R4C9 can only be <9>
R6C9 can only be <2>
R5C8 can only be <4>
R6C2 can only be <9>
R5C9 can only be <1>
R9C8 can only be <2>
R6C8 can only be <8>
R7C9 can only be <7>
R7C4 can only be <2>
R8C9 can only be <4>
R8C4 can only be <7>
R9C4 can only be <4>


 

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