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 3, number 1 is only possible in cell (9,3)









For row 2, number 1 is only possible in cell (1,2)









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









For row 4, number 8 is only possible in cell (6,4)









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









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









For box 6, candidates for 4 are all in column 9, so you can remove candidates from other blocks.









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









Candidates for 3 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.









Candidates for 9 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.









Naked Pair for 2 and 4, can remove these as candidates from other cells.









Hidden Pair for 4 and 6, can remove other candidates from these cells.









Hidden Pair for 7 and 8, can remove other candidates from these cells.









Hidden Pair for 4 and 6, can remove other candidates from these cells.









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









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









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









Naked Triple for 2, 4 and 5, can remove these as candidates from other cells.









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









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









For box 3, candidates for 5 are all in row 1, so you can remove candidates from other blocks.









For box 1, candidates for 5 are all in column 2, so you can remove candidates from other blocks.









For blocks 3 and 9, candidates for 5 are all in the same two columns (7 and 8)









Hidden Pair for 1 and 5, can remove other candidates from these cells.









Naked Triple for 1, 3 and 9, can remove these as candidates from other cells.









X-Wing in rows for 8.









Either candidate for cell (2,3) forces 4 into cell (2,5).









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









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









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









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









Number 4 is the only value possible in cell (1,7).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 5 is the only value possible in cell (9,6).









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









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









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









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









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









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









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









Number 3 is the only value possible in cell (4,6).









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









Number 9 is the only value possible in cell (6,5).









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









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









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









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









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









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









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









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









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









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









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









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









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









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









Number 1 is the only value possible in cell (7,9).









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









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