Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









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









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









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









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









For row 2, number 5 is only possible in cell (9,2)









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









For row 6, number 4 is only possible in cell (1,6)









For row 6, number 9 is only possible in cell (2,6)









For row 2, number 9 is only possible in cell (3,2)









For row 7, number 9 is only possible in cell (1,7)









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









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









For column 6, Number 8 is only possible in cell (6,7)









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









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









For row 4, number 2 is only possible in cell (8,4)









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









For column 5, Number 2 is only possible in cell (5,3)









For row 4, number 6 is only possible in cell (5,4)









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









Number 3 is the only value possible in cell (5,7).









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









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









Number 7 is the only value possible in cell (4,2).









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









For row 4, number 3 is only possible in cell (9,4)









For box 1, candidates for 6 are all in row 1, so you can remove candidates from other blocks.









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









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









X-Wing in rows for 7.









Either candidate for cell (9,1) forces 6 into cell (8,2).









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









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









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









Either candidate for cell (2,4) forces 3 into cell (3,8).









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









For row 1, number 2 is only possible in cell (3,1)









Either candidate for cell (3,3) forces 6 into cell (2,1).









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









Number 7 is the only value possible in cell (2,4).









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









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









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









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









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









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









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









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









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









Number 3 is the only value possible in cell (7,1).









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









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









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









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









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









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









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









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









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