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 4, number 9 is only possible in cell (5,4)









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









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









For column 4, Number 2 is only possible in cell (4,1)









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









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









For column 8, Number 3 is only possible in cell (8,5)









For row 5, number 1 is only possible in cell (7,5)









For row 3, number 1 is only possible in cell (8,3)









For row 7, number 1 is only possible in cell (9,7)









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









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









For column 3, Number 5 is only possible in cell (3,1)









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









For row 7, number 9 is only possible in cell (3,7)









For box 7, candidates for 4 are all in column 2, so you can remove candidates from other blocks.









For box 4, candidates for 3 are all in column 1, so you can remove candidates from other blocks.









Candidates for 8 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.









Candidates for 6 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.









Naked Pair for 1 and 3, can remove these as candidates from other cells.









Naked Pair for 6 and 8, can remove these as candidates from other cells.









Naked Pair for 3 and 7, can remove these as candidates from other cells.









For column 7, Number 7 is only possible in cell (7,9)









Hidden Pair for 3 and 4, can remove other candidates from these cells.









For column 6, Number 5 is only possible in cell (6,2)









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









Number 6 is the only value possible in cell (8,1).









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









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









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









Number 6 is the only value possible in cell (2,3).









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









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









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









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









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









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









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









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









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









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









Number 8 is the only value possible in cell (9,6).









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









Number 4 is the only value possible in cell (2,7).









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









Number 6 is the only value possible in cell (1,8).









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









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









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









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









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









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









Number 7 is the only value possible in cell (2,8).









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









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









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









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









Number 4 is the only value possible in cell (6,9).









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









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