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 (5,5).









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









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









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









For row 4, number 1 is only possible in cell (6,4)









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









For row 2, number 8 is only possible in cell (6,2)









For row 7, number 6 is only possible in cell (3,7)









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









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









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









For row 4, number 8 is only possible in cell (7,4)









For row 1, number 8 is only possible in cell (9,1)









For box 6, candidates for 5 are all in row 5, so you can remove candidates from other blocks.









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









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









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









For row 6, number 4 is only possible in cell (2,6)









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









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









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









For row 2, number 3 is only possible in cell (1,2)









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









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









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









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









Number 9 is the only value possible in cell (4,1).









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









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









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









Number 5 is the only value possible in cell (8,2).









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









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









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









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









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









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









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









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









Number 7 is the only value possible in cell (8,5).









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (1,9).









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









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









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









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