Simple Sudoku Helper

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

[5]23789 [6]236789 [5]23679 [5]23468 [4]2478 [6]234678 [3]469 bk1 bk5 [4]1238 [5]23568 [5]12356 bk9 [5]12458 [7]1234568 [2]46 bk7 [5]23468 bk4 [7]2356789 [7]1235679 [5]23568 [5]12578 [7]1235678 [2]69 [5]23689 [5]23689 bk6 [5]24579 bk8 [3]245 [4]2459 [4]2459 bk3 [3]259 [5]12479 [4]2379 [6]234579 [6]234579 bk1 [4]2459 [6]234569 bk8 [4]2569 [5]24679 [4]1239 [5]23459 [6]123459 bk7 [5]24589 [7]2345689 [5]14569 [4]2569 [5]12469 bk5 [5]46789 [4]4679 [2]48 bk3 [5]14789 bk2 [3]689 [5]16789 [5]23789 [5]23789 [4]2379 [3]258 bk6 [6]125789 [4]1579 bk4 [5]13789 [5]23789 bk1 [6]234679 [4]2458 [6]245789 [6]245789 [4]5679 [5]35689 [5]36789