Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




For row 5, number 4 is only possible in cell (7,5)









For row 3, number 4 is only possible in cell (1,3)









For row 9, number 4 is only possible in cell (9,9)









For row 1, number 4 is only possible in cell (4,1)









For row 2, number 4 is only possible in cell (8,2)









For row 5, number 3 is only possible in cell (3,5)









For box 5, Number 7 is only possible in cell (6,4)









For column 4, Number 5 is only possible in cell (4,6)









For row 8, number 3 is only possible in cell (6,8)









For column 8, Number 5 is only possible in cell (8,7)









For column 2, Number 3 is only possible in cell (2,3)









For row 3, number 1 is only possible in cell (3,3)









Number 9 is the only value possible in cell (3,6).









Hidden Pair for 2 and 9, can remove other candidates from these cells.









Either candidate for cell (2,8) forces 5 into cell (3,4).









For row 9, number 5 is only possible in cell (1,9)









For box 7, candidates for 8 are all in column 3, so you can remove candidates from other blocks.









For box 7, candidates for 1 are all in row 8, so you can remove candidates from other blocks.









Naked Pair for 6 and 9, can remove these as candidates from other cells.









Either candidate for cell (2,2) forces 1 into cell (4,2).









Number 8 is the only value possible in cell (4,9).









For row 7, number 8 is only possible in cell (3,7)









For column 5, Number 8 is only possible in cell (5,1)









For row 9, number 1 is only possible in cell (6,9)









X-Wing in rows for 9.









Either candidate for cell (9,2) forces 6 into cell (1,6).









Number 7 is the only value possible in cell (8,6).









Number 6 is the only value possible in cell (8,8).









Number 9 is the only value possible in cell (4,8).









Number 6 is the only value possible in cell (4,5).









Number 9 is the only value possible in cell (6,5).









Number 2 is the only value possible in cell (6,2).









Number 6 is the only value possible in cell (6,1).









Number 9 is the only value possible in cell (5,3).









Number 6 is the only value possible in cell (7,3).









Number 2 is the only value possible in cell (9,8).









Number 1 is the only value possible in cell (1,8).









Number 8 is the only value possible in cell (1,4).









Number 9 is the only value possible in cell (1,2).









Number 2 is the only value possible in cell (1,1).









Number 7 is the only value possible in cell (3,1).









Number 3 is the only value possible in cell (7,1).









Number 9 is the only value possible in cell (9,1).









Number 8 is the only value possible in cell (2,2).









Number 7 is the only value possible in cell (9,2).









Number 1 is the only value possible in cell (2,4).









Number 2 is the only value possible in cell (7,4).









Number 6 is the only value possible in cell (9,4).









Number 1 is the only value possible in cell (7,6).









Number 3 is the only value possible in cell (9,6).









Number 7 is the only value possible in cell (7,7).









Number 6 is the only value possible in cell (5,7).









Number 1 is the only value possible in cell (9,7).









Number 7 is the only value possible in cell (2,8).









Number 2 is the only value possible in cell (3,9).









Number 7 is the only value possible in cell (5,9).









Number 9 is the only value possible in cell (7,9).