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 (4,8).









Number 8 is the only value possible in cell (4,9).









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









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









Number 9 is the only value possible in cell (5,8).









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









For row 4, number 9 is only possible in cell (2,4)









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









For row 7, number 8 is only possible in cell (1,7)









For row 3, number 7 is only possible in cell (8,3)









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









For column 4, Number 4 is only possible in cell (4,3)









For box 2, candidates for 2 are all in column 5, so you can remove candidates from other blocks.









For box 7, candidates for 2 are all in row 9, so you can remove candidates from other blocks.









For box 2, candidates for 1 are all in column 6, so you can remove candidates from other blocks.









Candidates for 4 in boxes 1 and 4 force the candidates in box 7 to be in the remaining line.









Naked Pair for 3 and 5, can remove these as candidates from other cells.









Hidden Pair for 5 and 8, can remove other candidates from these cells.









X-Wing in rows for 3.









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









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









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









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









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









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









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









Number 8 is the only value possible in cell (9,5).









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









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









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









Number 3 is the only value possible in cell (6,1).









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









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









Number 1 is the only value possible in cell (4,6).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 5 is the only value possible in cell (9,8).









Number 1 is the only value possible in cell (2,8).









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









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









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