Astraware Sudoku - It's a different kind of Zen

Step-By-Step Solution:

Initial Grid

                    
First step - add in all possible valid pencilmarks.




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









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









For row 1, number 6 is only possible in cell (4,1)









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









For row 8, number 1 is only possible in cell (5,8)









For column 9, Number 1 is only possible in cell (9,6)









For column 1, Number 8 is only possible in cell (1,5)









For column 6, Number 8 is only possible in cell (6,3)









For column 9, Number 8 is only possible in cell (9,1)









For row 5, number 9 is only possible in cell (3,5)









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









For column 1, Number 9 is only possible in cell (1,7)









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









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









For column 5, Number 3 is only possible in cell (5,9)









For box 7, Number 3 is only possible in cell (2,7)









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









For box 7, candidates for 5 are all in row 9, so you can remove candidates from other blocks.









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









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









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









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









For box 4, candidates for 3 are all in row 4, so you can remove candidates from other blocks.









Candidates for 7 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.









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









Number 3 is the only value possible in cell (7,1).









For row 5, number 3 is only possible in cell (8,5)









For blocks 6 and 9, candidates for 2 are all in the same two columns (7 and 9)









Swordfish in columns for 5.









Either candidate for cell (1,4) forces 4 into cell (3,6).









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









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









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









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









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









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









Number 9 is the only value possible in cell (8,1).









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









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









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









Number 3 is the only value possible in cell (1,2).









Number 2 is the only value possible in cell (1,3).









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









Number 5 is the only value possible in cell (9,3).









Number 5 is the only value possible in cell (1,4).









Number 2 is the only value possible in cell (7,4).









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









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









Number 8 is the only value possible in cell (7,6).









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









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









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









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









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









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









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