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