Simple Sudoku Helper

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

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]3489 [5]46789 [6]346789 [4]3469 [4]4569 [5]34569 [4]3569 bk1 bk2 bk5 [5]14679 [7]1234679 [5]23469 [4]1469 bk8 [3]369 [5]34679 [5]34679 [6]123489 [5]14689 [7]1234689 bk7 [5]14569 [7]1234569 [4]3569 [5]34689 [6]345689 bk6 [4]4589 [5]34589 bk1 bk2 [4]4579 [2]39 [4]3789 [4]3789 bk7 [3]189 [5]12389 [3]689 [3]689 [2]69 bk4 bk5 [5]13689 [5]12489 [5]14589 [6]124589 [4]4689 bk3 [5]45679 [4]1269 [5]26789 [5]16789 [3]149 bk3 [6]145679 [4]2469 [5]14679 [6]124679 bk8 [4]2469 [5]14569 [4]1489 [5]14689 [5]14689 bk5 [5]14689 [6]123469 bk7 [5]23469 [5]13469 [4]1489 bk2 [7]1456789 [5]34689 [6]146789 [6]134679 [5]13569 [4]3469 [6]134569