The need to divide things among people is an aspect of daily life filled with potential pitfalls. Whether the deal involves land, an inheritance or credit for an idea, a split perceived as unfair can lead to war, personal feuds, or silent, seething resentment. Computer scientists at Carnegie Mellon University hope to minimize such unwelcome outcomes through a new website, Spliddit.org, that offers “provably fair” solutions to everyday dilemmas–how to split rent, divide goods or apportion credit for a project. The site employs the latest mathematical and theoretical approaches to these problems, but site visitors won’t need an advanced degree to use them.