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









For column 4, Number 6 is only possible in cell (4,5)









For column 4, Number 9 is only possible in cell (4,1)









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









For row 4, number 6 is only possible in cell (2,4)









For row 9, number 6 is only possible in cell (8,9)









For row 3, number 6 is only possible in cell (5,3)









For row 2, number 6 is only possible in cell (7,2)









For row 8, number 6 is only possible in cell (1,8)









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









For column 6, Number 4 is only possible in cell (6,5)









For column 6, Number 8 is only possible in cell (6,2)









For row 6, number 4 is only possible in cell (2,6)









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









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









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









For box 4, candidates for 1 are all in row 5, so you can remove candidates from other blocks.









Candidates for 7 in boxes 2 and 5 force the candidates in box 8 to be in the remaining line.









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









Naked Triple for 2, 3 and 7, can remove these as candidates from other cells.









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









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









X-Wing in rows for 5.









Either candidate for cell (7,1) forces 8 into cell (1,3).









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









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









Either candidate for cell (1,1) forces 4 into cell (8,3).









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









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









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









Number 2 is the only value possible in cell (3,4).









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









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









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









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









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









Number 5 is the only value possible in cell (1,7).









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









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









Number 3 is the only value possible in cell (7,8).









Number 5 is the only value possible in cell (7,1).









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









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









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









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









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









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









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









Number 7 is the only value possible in cell (9,5).









Number 2 is the only value possible in cell (4,6).









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









Number 3 is the only value possible in cell (8,6).









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









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









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









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









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









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









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









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









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









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