Probability calculator for the board game risk
npm install risk!["Risk"][png]
[png]: https://raw.github.com/brainss/risk/master/screenshot.png
npm install risk -g
$ risk [attackers] [defenders]
The number of attackers does not include the one required on the territory
`` javascript
var risk = require('risk');
risk(7, 5); // 0.7364
risk(4, 5); // 0.3586
``