Simple Sudoku Helper

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

[5]23589 [4]2368 [6]235689 [4]2378 [6]236789 [6]236789 [4]2356 bk1 bk4 bk7 [6]123468 [8]12345689 [5]12348 [6]234689 [6]123689 [4]2356 [5]35689 [5]23689 [5]23489 [6]123468 [7]1234689 bk5 [7]2346789 [7]1236789 [3]236 [5]36789 [6]236789 [3]238 bk9 [5]23678 [4]2378 bk1 bk4 [3]356 [4]3568 [3]368 [3]348 bk5 [5]13468 [2]38 [3]389 [3]389 bk7 bk2 [5]13689 [4]2348 [6]123478 [6]123478 bk6 [6]235789 [6]235789 [4]1345 [5]34589 [4]1389 [3]234 [4]2347 [4]2347 bk9 [5]23467 [5]12367 bk8 [4]3467 bk5 bk6 [5]23478 [6]234578 [6]123478 [6]234578 [6]123578 bk9 [3]347 [4]1237 bk1 [5]23478 [7]2345789 [5]23478 [7]2345678 [6]235678 [4]2346 [4]3467 [4]2367