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 (2,3).









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









For row 4, number 2 is only possible in cell (3,4)









For row 4, number 9 is only possible in cell (1,4)









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









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









For box 5, Number 4 is only possible in cell (6,6)









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









Number 4 is the only value possible in cell (1,5).









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









Number 7 is the only value possible in cell (3,6).









For row 4, number 7 is only possible in cell (9,4)









For box 5, Number 5 is only possible in cell (4,6)









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









Naked Pair for 5 and 8, can remove these as candidates from other cells.









Hidden Pair for 4 and 9, can remove other candidates from these cells.









For box 3, candidates for 7 are all in column 8, so you can remove candidates from other blocks.









Number 6 is the only value possible in cell (8,7).









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









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









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









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









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









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









Number 4 is the only value possible in cell (3,2).









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









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









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









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









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









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









Number 6 is the only value possible in cell (7,3).









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









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









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









Number 1 is the only value possible in cell (9,6).









Number 3 is the only value possible in cell (7,6).









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (6,1).









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (6,9).









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