Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









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









Number 5 is the only value possible in cell (3,6).









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









For row 1, number 6 is only possible in cell (3,1)









For row 7, number 6 is only possible in cell (7,7)









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









For row 9, number 6 is only possible in cell (4,9)









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









For row 4, number 3 is only possible in cell (8,4)









For row 5, number 3 is only possible in cell (1,5)









For box 4, candidates for 4 are all in column 3, so you can remove candidates from other blocks.









For box 3, candidates for 5 are all in row 1, so you can remove candidates from other blocks.









For box 1, candidates for 8 are all in row 2, so you can remove candidates from other blocks.









For blocks 3 and 6, candidates for 5 are all in the same two columns (7 and 9)









Naked Pair for 1 and 9, can remove these as candidates from other cells.









Naked Pair for 5 and 9, can remove these as candidates from other cells.









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









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









Naked Triple for 7, 8 and 9, can remove these as candidates from other cells.









Number 5 is the only value possible in cell (8,9).









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









X-Wing in rows for 9.









For row 8, number 9 is only possible in cell (6,8)









Either candidate for cell (4,2) forces 3 into cell (6,1).









Number 1 is the only value possible in cell (6,9).









Number 5 is the only value possible in cell (6,2).









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









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









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









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









Number 2 is the only value possible in cell (5,1).









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









Number 5 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 (1,2).









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









Number 4 is the only value possible in cell (5,2).









Number 8 is the only value possible in cell (4,3).









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









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









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









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









Number 1 is the only value possible in cell (3,4).









Number 5 is the only value possible in cell (9,4).









Number 4 is the only value possible in cell (3,5).









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









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









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









Number 2 is the only value possible in cell (4,8).









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









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









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









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









Number 7 is the only value possible in cell (3,9).









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









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









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