Kakuro is the latest craze to come from the land of the rising sun. In fact it's a bigger hit in Japan than SuDoku. Similar rules but much more addictive. The games has six levels of difficulty, ranging from Beginner to Kakuro Master, plus many unique Mastersoft Features including Ball of String. The program integrates lots of other options such as turning sound off, hiding timer, and score to aid concentration.
This is the Desktop version for Windows XP and Vista. Pocket PC and Windows Mobile versions also available.