Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 3, number 9 is only possible in cell (5,3)









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









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









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









For row 8, number 9 is only possible in cell (1,8)









For column 2, Number 1 is only possible in cell (2,4)









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









For box 4, Number 8 is only possible in cell (1,6)









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









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









For column 9, Number 7 is only possible in cell (9,2)









For row 2, number 3 is only possible in cell (8,2)









For column 9, Number 1 is only possible in cell (9,8)









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









For box 4, candidates for 2 are all in column 3, so you can remove candidates from other blocks.









For box 9, candidates for 2 are all in column 8, so you can remove candidates from other blocks.









For box 8, candidates for 5 are all in column 5, so you can remove candidates from other blocks.









Either candidate for cell (1,2) forces 7 into cell (4,1).









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









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









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









Number 1 is the only value possible in cell (7,2).









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









Number 5 is the only value possible in cell (8,6).









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









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









Hidden Pair for 3 and 6, can remove other candidates from these cells.









X-Wing in columns for 6.









Either candidate for cell (1,4) forces 7 into cell (6,9).









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









Either candidate for cell (5,4) forces 4 into cell (1,9).









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









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









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









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









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









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









Number 8 is the only value possible in cell (4,2).









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









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









Number 6 is the only value possible in cell (5,4).









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









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









Number 8 is the only value possible in cell (6,5).









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









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









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









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









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









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









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









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









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









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









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









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









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