┏━━━┯━━━┯━━━┳━━━┯━━━┯━━━┳━━━┯━━━┯━━━┓ ┃ │ │ ┃ 3 │ 6 │ ┃ 4 │ 9 │ ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ 6 │ 8 │ ┃ 4 │ │ ┃ │ │ 5 ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ 7 │ 4 │ 9 ┃ 1 │ │ ┃ │ │ ┃ ┣━━━┿━━━┿━━━╋━━━┿━━━┿━━━╋━━━┿━━━┿━━━┫ ┃ │ │ ┃ 7 │ │ 1 ┃ │ │ ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ 1 │ │ 7 ┃ 6 │ 5 │ 4 ┃ │ 8 │ 2 ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ 4 │ │ ┃ │ │ ┃ │ 5 │ ┃ ┣━━━┿━━━┿━━━╋━━━┿━━━┿━━━╋━━━┿━━━┿━━━┫ ┃ 5 │ 3 │ ┃ │ 1 │ ┃ 6 │ 2 │ ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ │ │ ┃ 5 │ │ ┃ │ │ ┃ ┠───┼───┼───╂───┼───┼───╂───┼───┼───┨ ┃ │ │ ┃ │ 9 │ ┃ 5 │ 3 │ ┃ ┗━━━┷━━━┷━━━┻━━━┷━━━┷━━━┻━━━┷━━━┷━━━┛
Many sudoku software and websites will accept a string of 81 numbers so that you can use them to complete the puzzle interactively.
0,0,0,3,6,0,4,9,0,6,8,0,4,0,0,0,0,5,7,4,9,1,0,0,0,0,0,0,0,0,7,0,1,0,0,0,1,0,7,6,5,4,0,8,2,4,0,0,0,0,0,0,5,0,5,3,0,0,1,0,6,2,0,0,0,0,5,0,0,0,0,0,0,0,0,0,9,0,5,3,0
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~EOF~