Simple Sudoku Helper

+   +   +     +   +   +     +   1   3   +   4   +     +   +   +     +   9   +   2   +   +     +   7   +     +   +   +     7   +   6     +   +   +     4   +   +   +   +   +     3   +   +     +   +   +   +   +   +     9   +   +     +   +   +     +   3   +     1   +   +     5   +   +   +   +   +     +   6   +     8   +   7   +   +   +     +   +   +     +   +   +

Enter some numbers and press "Update" Cells that contain just a number are completed; the only option provided by the drop-down box is bk (for "back") which will un-set the box. Cells that contain a number in square brackets are currently uncompleted; the number shows how many legal entries there are, and the drop-down box permits the selection of one of those legal entries. Get Another One

[4]5689 [5]56789 [4]5789 [5]24568 [5]24589 [6]245689 [3]267 bk1 bk3 [5]13568 bk4 [5]13578 [4]2568 [5]12358 [6]123568 [3]267 bk9 [4]2568 bk2 [5]15689 [5]13589 [4]4568 bk7 [7]1345689 [1]6 [4]4568 [4]4568 bk7 [5]12589 bk6 [3]258 [4]1258 [4]1258 bk4 [4]2358 [5]12589 [5]14589 [5]12589 [6]124589 bk3 [5]12458 [7]1245678 [5]12679 [5]25678 [6]125689 [5]13458 [4]1258 [6]123458 bk9 [5]12458 [7]1245678 [5]12367 [6]235678 [5]12568 [4]4689 bk3 [5]24789 bk1 [4]2489 [5]24789 bk5 [3]246 [4]2469 [4]1459 [4]1259 [5]12459 [3]245 bk6 [5]23459 bk8 [3]234 bk7 [6]145689 [7]1256789 [7]1245789 [5]24578 [6]234589 [7]2345789 [5]12369 [4]2346 [5]12469