Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









For row 8, number 3 is only possible in cell (2,8)









For column 6, Number 4 is only possible in cell (6,2)









For row 3, number 4 is only possible in cell (9,3)









For column 9, Number 2 is only possible in cell (9,2)









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









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









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









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









For row 6, number 7 is only possible in cell (9,6)









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









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









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









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









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









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









For column 2, Number 4 is only possible in cell (2,5)









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









For row 6, number 5 is only possible in cell (1,6)









For box 3, candidates for 6 are all in column 8, so you can remove candidates from other blocks.









Either candidate for cell (5,2) forces 8 into cell (4,3).









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









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









For row 6, number 8 is only possible in cell (2,6)









For column 6, Number 1 is only possible in cell (6,6)









For box 1, candidates for 7 are all in column 3, so you can remove candidates from other blocks.









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









Swordfish in columns for 6.









Either candidate for cell (5,5) forces 9 into cell (3,6).









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









Number 9 is the only value possible in cell (7,4).









Either candidate for cell (4,4) forces 6 into cell (3,2).









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









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









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









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









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









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









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









Number 6 is the only value possible in cell (2,7).









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









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









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









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









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









Number 1 is the only value possible in cell (8,4).









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









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









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









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









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









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









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