A KAKURO puzzle is constructed on a crossword grid just like a standard crossword, but the digits 1 to 9 are used instead of the letters of the alpahabet. In a standard Kakuro puzzle, the Across and Down clues are simply the sums of the digits in the across and down words. A variant of this standard is to use the products of the digits for the clues. Crossword Express will make both of these variants.

The following graphics show a Kakuro puzzle in the Crossword Express Solve screen and a PNG graphic file produced by the program's print function, showing the complete puzzle solution. See also a  full size version of a PDF file  showing the solution.

The key features of the Crossword Express Kakuro Construction function are as follows:-
  • Fully automatic construction of puzzles.

  • Puzzles may be built in both add and multiply mode.

  • A multi-build function allows the construction of many puzzles (thousands if necessary) in a single operation.

  • Puzzles can be printed in an unprecedented range of user controlled colors and formats. Output can be sent direct to the printer or, if you install the appropriate software, it can be sent to a PDF file. The recommended software for this purpose is  Primo PDF which you can download free from their website,  although you might consider sending them a small donation if you find their program useful. Mac users will be able to create a PDF file directly from the screen provided by the printer driver.

  • Formatted output can also be exported from the Print screen to graphic files which conform to the BMP, GIF, JPG or PNG formats.

  • A fully interactive Solve function is available to allow you to solve the puzzles "on screen" without needing to print them.