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 8, number 2 is only possible in cell (8,8)









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









Number 6 is the only value possible in cell (9,2).









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









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









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









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









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









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









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









For row 9, number 6 is only possible in cell (7,9)









For row 3, number 2 is only possible in cell (7,3)









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









For box 7, candidates for 1 are all in column 1, so you can remove candidates from other blocks.









For box 9, candidates for 7 are all in column 9, so you can remove candidates from other blocks.









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









Naked Pair for 7 and 8, can remove these as candidates from other cells.









Hidden Pair for 4 and 6, can remove other candidates from these cells.









For box 4, candidates for 8 are all in column 1, so you can remove candidates from other blocks.









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









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









Hidden Pair for 1 and 9, can remove other candidates from these cells.









Either candidate for cell (4,1) forces 9 into cell (4,3).









For row 7, number 9 is only possible in cell (6,7)









Either candidate for cell (4,1) forces 5 into cell (5,5).









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









Naked Pair for 2 and 7, can remove these as candidates from other cells.









Either candidate for cell (3,7) forces 4 into cell (6,6).









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









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









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









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









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









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









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









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









Number 5 is the only value possible in cell (1,6).









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









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









Number 2 is the only value possible in cell (9,6).









Number 1 is the only value possible in cell (9,5).









Number 8 is the only value possible in cell (4,7).









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









Number 8 is the only value possible in cell (5,1).









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









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









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









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









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









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









Number 3 is the only value possible in cell (2,5).









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









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









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









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









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









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









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









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









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









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