Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









For row 3, number 6 is only possible in cell (2,3)









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









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









For row 8, number 4 is only possible in cell (9,8)









For row 8, number 9 is only possible in cell (4,8)









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









Number 9 is the only value possible in cell (6,4).









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









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









For row 3, number 4 is only possible in cell (1,3)









For row 1, number 4 is only possible in cell (5,1)









For box 2, Number 5 is only possible in cell (6,2)









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









For box 6, candidates for 1 are all in column 7, so you can remove candidates from other blocks.









For box 1, candidates for 3 are all in row 1, so you can remove candidates from other blocks.









For column 8, Number 3 is only possible in cell (8,7)









X-Wing in columns for 1.









Number 8 is the only value possible in cell (6,9).









For blocks 6 and 9, candidates for 8 are all in the same two columns (7 and 9)









For row 3, number 8 is only possible in cell (4,3)









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









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









For box 8, candidates for 7 are all in row 7, so you can remove candidates from other blocks.









Either candidate for cell (6,3) forces 6 into cell (5,5).









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









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









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









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









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









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









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









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









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









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









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









Number 2 is the only value possible in cell (9,3).









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









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









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









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









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









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









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









Number 9 is the only value possible in cell (3,7).









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









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









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









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









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









Number 9 is the only value possible in cell (1,2).









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









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









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









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









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









Number 5 is the only value possible in cell (2,8).









Number 1 is the only value possible in cell (2,9).









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