solve

 sudoku

Only one place for a 3 in box 6. Therefore only one cell left for the 2 at c7r4.
That 2 in row 4 makes a 5 in column 2. Now the 2 and 5 are chosen it can only be a 6 in c4r4.
There is now only one place for a 3 in box 5 and finally an 8 in the last cell c9r4.

That 8 in box 6 makes c9r6 a 7 with a 6 in the last cell.

Column c8 has only the three cells left in box 9 with 2, 6 and 9 possible. Therefore 2, 6 and 9 cannot be elsewhere in box 9 so time to clean up the possibles ...

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