Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




Number 2 is the only value possible in cell (5,3).









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









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









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









Number 7 is the only value possible in cell (8,4).









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









Number 7 is the only value possible in cell (3,5).









Number 2 is the only value possible in cell (7,6).









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









For row 2, number 7 is only possible in cell (6,2)









For row 6, number 7 is only possible in cell (4,6)









For row 8, number 7 is only possible in cell (2,8)









For row 2, number 6 is only possible in cell (7,2)









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









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









For row 9, number 6 is only possible in cell (2,9)









For row 4, number 9 is only possible in cell (3,4)









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









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









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









Naked Triple for 4, 8 and 9, can remove these as candidates from other cells.









For box 7, candidates for 9 are all in column 1, so you can remove candidates from other blocks.









For box 9, candidates for 9 are all in column 8, so you can remove candidates from other blocks.









For row 2, number 9 is only possible in cell (2,2)









For row 2, number 1 is only possible in cell (9,2)









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









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









Number 9 is the only value possible in cell (4,3).









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









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









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









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









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









Number 5 is the only value possible in cell (2,7).









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









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









Number 5 is the only value possible in cell (8,1).









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









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









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









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









Number 4 is the only value possible in cell (9,3).









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









Number 4 is the only value possible in cell (2,6).









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (3,8).









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









Number 4 is the only value possible in cell (3,9).









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









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









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