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 5, number 8 is only possible in cell (1,5)









For row 7, number 8 is only possible in cell (5,7)









For row 1, number 8 is only possible in cell (4,1)









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









For row 9, number 3 is only possible in cell (1,9)









For box 3, Number 4 is only possible in cell (9,1)









For box 8, candidates for 5 are all in row 8, so you can remove candidates from other blocks.









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









For box 7, candidates for 6 are all in column 2, so you can remove candidates from other blocks.









For box 4, candidates for 6 are all in column 3, so you can remove candidates from other blocks.









Candidates for 7 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.









Naked Pair for 4 and 5, can remove these as candidates from other cells.









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









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









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









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









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









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









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









Number 3 is the only value possible in cell (5,1).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (7,5).









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









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









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









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









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









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









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









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









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









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









Number 5 is the only value possible in cell (4,8).









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









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









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









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









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