Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




For column 4, Number 3 is only possible in cell (4,2)









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









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









For column 4, Number 9 is only possible in cell (4,8)









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









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









For box 4, candidates for 9 are all in row 5, so you can remove candidates from other blocks.









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









For box 8, candidates for 6 are all in row 8, so you can remove candidates from other blocks.









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









Naked Pair for 6 and 8, can remove these as candidates from other cells.









Candidates for 6 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.









Candidates for 8 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.









Naked Pair for 1 and 8, can remove these as candidates from other cells.









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









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









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









For row 3, number 6 is only possible in cell (9,3)









For row 3, number 4 is only possible in cell (6,3)









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









Number 4 is the only value possible in cell (9,2).









For row 3, number 9 is only possible in cell (8,3)









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









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









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









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









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









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









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









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









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









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









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









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









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









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









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









For box 3, candidates for 8 are all in column 7, so you can remove candidates from other blocks.









X-Wing in columns for 1.









Either candidate for cell (8,5) forces 7 into cell (7,4).









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









Number 1 is the only value possible in cell (3,4).









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









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









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









Either candidate for cell (1,8) forces 5 into cell (3,7).









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









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









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









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









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









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









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









Number 7 is the only value possible in cell (2,3).









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









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









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









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









Number 2 is the only value possible in cell (9,7).









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









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









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









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









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









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