Magnum Opus
Kakuro puzzles are similar to crossword puzzles in that they are built on standard crossword grids, but
instead of using letters, the digits 1 to 9 are used.
The clue for each
word of these puzzles is the number which results from adding the digits of the
word.
There is also a less common variant of the puzzle in which the clue is formed by multiplying the digits of the
word.
By tradition, the clues are displayed within the puzzle, inside either the normal black pattern cells, or in a set of special
black cells which run across the top of the puzzle and down the left hand side.
When first displayed, each active cell contains an array of the complete set of nine possible digits. Solving the puzzle consists
of determining which of these digits cannot possibly fit into the cell, and removing them by pointing and clicking with the mouse. When only a single digit
remains, this becomes the solution for that cell.
Any digit which is typed at the keyboard will be placed into the red focus cell to become part of the solution.
The location of the red focus cell may be shifted by pointing and clicking with the mouse, or by means of the cursor control keys.