Simple Sudoku Helper

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

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]3567 [3]346 [5]34567 [4]4589 [5]35789 [6]345789 [5]45789 bk1 bk2 bk9 bk8 [6]134567 [4]1245 [4]2357 [6]123457 [3]457 [5]34567 [5]34567 [4]2357 [4]1234 [5]13457 bk6 [6]235789 [8]12345789 [5]45789 [5]34579 [6]345789 bk1 [3]369 [4]3569 bk7 [4]2569 [5]24569 [4]2459 bk8 [4]3459 bk4 [3]369 bk2 [4]1589 [4]5689 [5]15689 [4]1579 [4]3579 [5]13579 [3]578 [1]9 [4]5789 bk3 [4]2589 [6]124589 bk6 [5]24579 [5]14579 [3]268 bk7 [5]14689 [4]2589 [5]25689 [5]25689 bk3 [5]24569 [6]145689 [4]2368 bk5 [5]13689 [3]289 bk4 [6]236789 [5]12789 [4]2679 [5]16789 [4]2368 [5]23469 [5]34689 [4]2589 bk1 [7]2356789 [6]245789 [6]245679 [6]456789