Uzaku Guide to Mahjong Tile Efficiency Similar level and concepts as RB1. Use this one instead of RB1 if you prefer WWYD style introduction to intermediate concepts.
Uzaku wwyd 300 (Yes read 301 first, people complained 300 was too hard, so they made the sequel easier!)
How the Robot Plays Analysis of LuckyJ games, a bot with a distictive style. You might like this style if you want to play more defensively or just something slightly different from most other bots.