(Also lomonster.com and clomont.com)

Chris Lomont's Cross Sums page



Lomont's Cross Sums


Here is a program I made to play, solve, edit, and in general let you enjoy Cross Sum Puzzles.

Over 150 puzzles can be found here and here!

Main Image

Download here

                Lomont's Cross Sums (830K  self-installing executable)



  • Play almost unlimited size cross sums

  • Multiple chains of reasoning

  • Includes over 10 puzzles

  • Easily enter puzzles from magazines and from the web

  • Save your work at any stage

  • Spinning logo :)

If you enjoy this, and use it over 30 days, please send $15 to

                Chris Lomont
                Izi Wa Computer Miscellany
                10620 Oak Chapel Dr
                Ft Wayne, IN 46845

Please include a way I can email you updates and newer versions, and I will send the next version (see below).

If you would like to email me puzzles (CLOMONT at MATH.PURDUE.EDU) I will include them on my website and include them in future versions, with credit of course. Do not send others work or copyrighted material.

If I make over $900 (just 60 people!) then I will add the following features:


  • hint mode

  • when over "sum" in hint (helper?) mode, show possibilities left/total , show amount left to fill in?

  • when over square in hint mode, show possibilities

  • copyright notices in file format, and other text allowed by user

  • in play right click erases (toggles eraser mode?)

  • make module to automatically create unlimited puzzles
            - given a diagram, it fills it in if it can
            - given a size, it creates total puzzle

  • symmetry settings: diagonal, central, off-diagonal, both-diagonal, none

  • allow user loaded background pictures

  • remember last directory used for reading files, etc and ensure config saved to exe directory? or user profile?

  • show solution text and timing should be optional

  • hotkeys for commands

  • more color schemes

  • color/size/font schemes editable/savable/loadable

  • printing

  • PNG file export for web shots

  • hint modes

  • shift puzzle up, left, etc (move insert/delete rows, cols)

  • best times for puzzle, number of moves

  • rotate puzzle

  • draw symmetry controls

Happy Puzzling!!

Back to Software