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 1, number 5 is only possible in cell (6,1)









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









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









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









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









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









For column 3, Number 5 is only possible in cell (3,9)









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









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









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









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









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









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









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









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









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









For column 9, Number 3 is only possible in cell (9,8)









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









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









For column 7, Number 3 is only possible in cell (7,1)









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









For row 6, number 5 is only possible in cell (8,6)









For column 7, Number 8 is only possible in cell (7,9)









Number 2 is the only value possible in cell (8,9).









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









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









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









Either candidate for cell (8,1) forces 9 into cell (1,1).









Either candidate for cell (1,3) forces 8 into cell (8,1).









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









Either candidate for cell (2,2) forces 9 into cell (7,6).









Either candidate for cell (9,5) forces 8 into cell (1,5).









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









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









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









Number 8 is the only value possible in cell (3,2).









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









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









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









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









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









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









Number 1 is the only value possible in cell (8,4).









Number 3 is the only value possible in cell (1,6).









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









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









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









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









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









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









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









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









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









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









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









Number 4 is the only value possible in cell (3,6).









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









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









Number 6 is the only value possible in cell (9,7).