Right, I feel frustrated to generate a Sudoku matrix manually. this will be the final one I try to generate. And it is asymmetric. Thanks for Scrose's very quick solution and thanks for Nick solving the previous one using forcing chain. Presumably this one will surely be solved by the same technique. I start to feel bored of the logic. It seems to me that a kind of chain will have to be established to solve this kind of things at the end of the day. And I feel that it may never need "try and error" to solve it given a logic like forcing chain. Based on this, I feel that it isn't worthy for people to think more about the transformation of the matrix, if the information is linked with each other, the transformation won't solve this and give a more systematic solution. However, the above is my personal view. Hope to hear some exciting news about Sudoku soon.

...|35.|..9

.67|...|...

...|..8|4..

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.31|8..|...

.4.|7.6|.9.

...|..1|73.

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..3|6..|...

...|...|81.

8..|.74|.6.