Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









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









For row 2, number 6 is only possible in cell (7,2)









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









For column 1, Number 1 is only possible in cell (1,9)









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









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









For row 8, number 6 is only possible in cell (3,8)









For row 5, number 7 is only possible in cell (6,5)









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









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









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









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









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









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









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









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









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









For row 4, number 1 is only possible in cell (7,4)









For box 6, candidates for 4 are all in row 5, so you can remove candidates from other blocks.









Naked Pair for 1 and 7, can remove these as candidates from other cells.









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









Naked Pair for 3 and 5, can remove these as candidates from other cells.









Either candidate for cell (2,2) forces 2 into cell (2,8).









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









Either candidate for cell (1,1) forces 7 into cell (1,7).









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









Hidden Pair for 2 and 3, can remove other candidates from these cells.









Either candidate for cell (1,1) forces 2 into cell (1,3).









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









Either candidate for cell (1,1) forces 3 into cell (9,6).









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (9,3).









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









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









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









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









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









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









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









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









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









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









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









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









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









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