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 Sudoku Solution Path   R3C4 can only be <1> R4C6 can only be <7> R6C6 can only be <1> R6C4 can only be <8> R7C4 can only be <5> R4C4 can only be <3> R6C7 can only be <6> R7C6 can only be <9> R5C5 can only be <5> R6C3 can only be <9> R3C6 can only be <6> R5C9 is the only square in row 5 that can be <1> R5C1 is the only square in row 5 that can be <6> Squares R2C8 and R5C8 in column 8 form a simple locked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.    R3C8 - removing <48> from <2458> leaving <25>    R7C8 - removing <4> from <246> leaving <26>    R8C8 - removing <4> from <2456> leaving <256> Squares R1C1<37>, R1C5<79> and R1C9<379> in row 1 form a comprehensive locked triplet. These 3 squares can only contain the 3 possibilities <379>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R1C3 - removing <7> from <257> leaving <25>    R1C7 - removing <39> from <2359> leaving <25> Squares R1C7 and R3C8 in block 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <25>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.    R3C7 - removing <25> from <24589> leaving <489> Squares R3C1 and R7C1 in column 1 and R3C9 and R7C9 in column 9 form a Simple X-Wing pattern on possibility <4>. All other instances of this possibility in rows 3 and 7 can be removed.    R3C2 - removing <4> from <2489> leaving <289>    R7C2 - removing <4> from <234> leaving <23>    R3C3 - removing <4> from <24578> leaving <2578>    R7C3 - removing <4> from <12467> leaving <1267>    R3C7 - removing <4> from <489> leaving <89>    R7C7 - removing <4> from <1234> leaving <123> Squares R2C8 and R4C3 form a remote locked pair. <48> can be removed from any square that is common to their groups.    R2C3 - removing <48> from <478> leaving <7> R2C5 can only be <9> R1C1 can only be <3> R1C5 can only be <7> R9C1 can only be <8> R1C9 can only be <9> R9C9 can only be <3> R3C7 can only be <8> R3C1 can only be <4> R4C7 can only be <4> R2C8 can only be <4> R4C3 can only be <8> R2C7 can only be <3> R5C8 can only be <8> R5C2 can only be <4> R7C9 can only be <4> R2C2 can only be <8> R3C9 can only be <7> R7C1 can only be <7> R8C2 can only be <2> R8C5 can only be <1> R3C2 can only be <9> R7C2 can only be <3> R9C3 can only be <1> R8C7 can only be <5> R9C5 can only be <2> R8C8 can only be <6> R1C7 can only be <2> R8C3 can only be <4> R7C8 can only be <2> R7C3 can only be <6> R9C7 can only be <9> R1C3 can only be <5> R7C7 can only be <1> R3C8 can only be <5> R3C3 can only be <2>

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