Need help with a Sudoku

[durron597]

Solution (using forcing chains twice, rows are A-J and colums 1-9):

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1) No matter what cell J1 is, cell D7 must be a 5 and cell E9 must be a 7. This is almost immediate in the case of a 5 and only very slightly longer in the case of a 4.
2) You can use this to solve cells C7, C8, J7, J8 immediately.
3) Cells D4,D5,D6 become a 679 triple
4) Cells F4,F5,F6 become a 258 triple
5) Cell F2 and C2 are now a 47 double
6) Cells B5,D5,I5 are a 479 triple
7) No matter what cell I5 is, cell D1 must be a 4. If I5 is a 9, then J1 is a 5 making D1 the only 4 in the column. If I5 is a 4, then J4 is a 9, so B4 is an 8, making B1 a 1 so D1 is a 4.

After that the puzzle solves itself like a regular sudoku.
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[youtalkfunny]

Thanks.