Chilli is an unusual bridge bidding system that places simplicity and universality of rules as its highest priority. In building the system, my intention was to produce a balance between a robust, tournament-level tool and a small, clean definition. I wanted practical bidding focussed on evaluation, not memory.
That's all still true, but it is in the nature of things (or at least in my nature) to continuously strive for improvement, and so we arrive at Chilli Two – a revised system that is a little more artificial than Original, but that is even simpler, and yet functionally improved to meet the main deficiencies of Original Chilli that were identified by my partners and Chilli's small but enthusiastic international following.
You can start with the fundamentals. You can also look at the reasoning behind Chilli Two and the history of Chilli. In some sections I have commented on how Two differs from Original. In the text, you can hover over words like definitions to see a brief explanation. There is a complete summary of the notation and terminology used in the terminology section.
There is a Chilli bidding blog, where you can make your comments and observations on Chilli.
Alan Williams, July 2008