Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 5, number 2 is only possible in cell (8,5)









For row 7, number 2 is only possible in cell (9,7)









For column 9, Number 8 is only possible in cell (9,9)









For box 9, candidates for 5 are all in row 8, 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.









Candidates for 5 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.









Naked Pair for 1 and 5, can remove these as candidates from other cells.









For box 1, candidates for 5 are all in column 2, so you can remove candidates from other blocks.









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









Hidden Pair for 1 and 6, can remove other candidates from these cells.









For column 4, Number 4 is only possible in cell (4,5)









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









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









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









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









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









Number 1 is the only value possible in cell (7,5).









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









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









Number 9 is the only value possible in cell (6,3).









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









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









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









Number 7 is the only value possible in cell (3,1).









Number 5 is the only value possible in cell (7,1).









Number 6 is the only value possible in cell (2,1).









Number 4 is the only value possible in cell (6,1).









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









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









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









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (2,4).









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









Number 6 is the only value possible in cell (1,4).









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









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









Number 2 is the only value possible in cell (1,6).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (7,9).









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