Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For column 3, Number 1 is only possible in cell (3,6)









For row 8, number 4 is only possible in cell (6,8)









For row 7, number 4 is only possible in cell (9,7)









For box 4, Number 4 is only possible in cell (1,4)









For row 5, number 6 is only possible in cell (2,5)









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









Number 9 is the only value possible in cell (2,6).









For row 2, number 6 is only possible in cell (3,2)









Number 8 is the only value possible in cell (3,8).









Number 2 is the only value possible in cell (3,7).









For row 3, number 8 is only possible in cell (2,3)









For column 2, Number 5 is only possible in cell (2,2)









Naked Triple for 2, 3 and 7, can remove these as candidates from other cells.









For column 6, Number 3 is only possible in cell (6,6)









X-Wing in rows for 7.









Hidden Pair for 7 and 9, can remove other candidates from these cells.









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









X-Wing in columns for 3.









Either candidate for cell (9,1) forces 5 into cell (5,3).









Number 1 is the only value possible in cell (5,7).









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









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









Number 8 is the only value possible in cell (4,6).









Number 2 is the only value possible in cell (8,6).









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









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









Number 1 is the only value possible in cell (7,4).









Number 5 is the only value possible in cell (8,5).









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









Number 3 is the only value possible in cell (8,7).









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









Number 3 is the only value possible in cell (2,1).









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









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









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









Number 9 is the only value possible in cell (8,3).









Number 3 is the only value possible in cell (7,2).









Number 9 is the only value possible in cell (4,2).









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









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









Number 9 is the only value possible in cell (3,1).









Number 4 is the only value possible in cell (3,3).









Number 3 is the only value possible in cell (4,3).









Number 2 is the only value possible in cell (7,3).









Number 1 is the only value possible in cell (4,5).









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









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









Number 7 is the only value possible in cell (6,4).









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









Number 6 is the only value possible in cell (1,8).









Number 9 is the only value possible in cell (7,8).









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









Number 3 is the only value possible in cell (1,9).









Number 7 is the only value possible in cell (4,9).









Number 8 is the only value possible in cell (6,9).









Number 6 is the only value possible in cell (7,9).









Number 1 is the only value possible in cell (8,9).









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