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Can someone give me the strategy - apart from trial and error - for finishing this puzzle?

8** *26 **7
*** *37 **8
*7* 498 *2*

163 759 842
754 281 963
9** 364 571

*9* 675 *84
4** *1* ***
6** *4* ***

Thanks

Work out where the 5 and 7 have to be in box 7, then look where the 8 can now go in column 3.

Thanks PaulIQ164 That was easy!