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 2, number 5 is only possible in cell (9,2)









For row 1, number 5 is only possible in cell (2,1)









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









For row 5, number 6 is only possible in cell (1,5)









For row 6, number 5 is only possible in cell (4,6)









For row 9, number 5 is only possible in cell (6,9)









For row 9, number 6 is only possible in cell (5,9)









For row 5, number 9 is only possible in cell (3,5)









For box 1, Number 8 is only possible in cell (3,1)









For box 3, Number 7 is only possible in cell (7,1)









For column 7, Number 6 is only possible in cell (7,6)









For box 3, candidates for 2 are all in column 8, so you can remove candidates from other blocks.









For box 6, candidates for 2 are all in row 4, so you can remove candidates from other blocks.









X-Wing in columns for 9.









X-Wing in columns for 3.









Naked Pair for 7 and 8, can remove these as candidates from other cells.









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









For row 4, number 2 is only possible in cell (7,4)









For row 4, number 9 is only possible in cell (8,4)









Number 1 is the only value possible in cell (8,7).









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









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









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









For row 9, number 1 is only possible in cell (4,9)









For box 7, Number 7 is only possible in cell (2,7)









Naked Pair for 7 and 8, can remove these as candidates from other cells.









For box 5, candidates for 7 are all in column 5, so you can remove candidates from other blocks.









Hidden Triple for 1, 3 and 6, can remove other candidates from these cells.









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









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









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









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









Number 1 is the only value possible in cell (6,4).









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









Number 2 is the only value possible in cell (8,1).









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









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









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









Number 6 is the only value possible in cell (8,3).









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









Number 3 is the only value possible in cell (2,4).









Number 7 is the only value possible in cell (3,4).









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









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









Number 7 is the only value possible in cell (1,2).









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









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









Number 9 is the only value possible in cell (5,2).









Number 7 is the only value possible in cell (4,3).









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









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









Number 1 is the only value possible in cell (9,5).









Number 2 is the only value possible in cell (1,6).









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









Number 1 is the only value possible in cell (3,6).









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









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









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









Number 3 is the only value possible in cell (5,8).









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









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









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









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