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 3 is only possible in cell (1,1)









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









For row 5, number 3 is only possible in cell (4,5)









For row 7, number 3 is only possible in cell (5,7)









For column 5, Number 8 is only possible in cell (5,6)









For column 1, Number 7 is only possible in cell (1,5)









For column 5, Number 7 is only possible in cell (5,4)









For box 6, Number 4 is only possible in cell (7,6)









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









For box 3, candidates for 9 are all in column 9, so you can remove candidates from other blocks.









For box 8, candidates for 9 are all in column 6, so you can remove candidates from other blocks.









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









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









Naked Pair for 5 and 6, can remove these as candidates from other cells.









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









For row 1, number 8 is only possible in cell (2,1)









For box 3, candidates for 5 are all in column 9, so you can remove candidates from other blocks.









Hidden Pair for 7 and 9, can remove other candidates from these cells.









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









Hidden Pair for 7 and 9, can remove other candidates from these cells.









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









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









Either candidate for cell (1,7) forces 5 into cell (1,2).









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









Either candidate for cell (2,7) forces 7 into cell (6,1).









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









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









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









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









Either candidate for cell (2,7) forces 5 into cell (8,4).









For blocks 5 and 6, candidates for 6 are all in the same two rows (5 and 6)









Either candidate for cell (1,9) forces 9 into cell (3,5).









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









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









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









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









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









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









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









For box 7, candidates for 6 are all in row 7, so you can remove candidates from other blocks.









For box 4, candidates for 1 are all in column 2, so you can remove candidates from other blocks.









Either candidate for cell (3,8) forces 2 into cell (6,9).









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









Number 1 is the only value possible in cell (7,9).









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









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









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









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









Number 5 is the only value possible in cell (2,6).









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









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









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









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









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









Number 6 is the only value possible in cell (1,7).









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (3,8).









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