Bot Bowl IV

Bot Bowl IV is the fourth AI competition in Blood Bowl and will happen (virtually) at the IEEE Conference of Games 2022.


Bot Bowl IV will have the same format as last year but with a few minor changes. The framework also offers a few new features and improvements that will empower bot developers. Group submissions are allowed but each person can only be part of one bot submission. Each group must have a team leader that will receive any prize money they win and the lead will be responsible of sharing it with the group.


Each bot will play 10 matches of against the random baseline. Bots that are able ot outperform the baseline will proceed to the round-robin tournament.


In the round-robing tournament, each bot will play 10 matches against each other and the tournament winner will be determined based on the following point system: 3 points for winning, 1 point for a draw, 0 points for a loss. In case of a tie, the bot with the highest score, and then inflicted casualties will win.

Match Rules

Each match will use the following configurations:

If a bot crashes and is unable to recover, the game will continue and the bot will simply timeout and not do anything during their turn.


Bot Bowl IV has a prize pool of $1000 with the following two prizes:

The same person or team is allowed to win both prizes.

New Features

Faster Pathfinding

The pathfinding module in the bot bowl framework has been improved significantly by compiling the python code to cython and through some other optimizations. The algorithm is estimated to be 20x faster compared to last year! This will make it easier for reinforcement learning bots to learn the game with pathfinding enabled. Check out the tutorial pathfinding-assistance in reinforcement learning to learn more.

We would like to thank Mattias Bermell for his awesome work on pathfinding module!

Forward Model

A forward model was introduced in Bot Bowl III. This year, the model is faster, has more features, and is more robust. We hope to see a few search-based bots in Bot Bowl IV!

We would like to thank Mattias Bermell for his awesome work on the forward model!

Check out the tutorial how to use the forward model and how to implement a search-based bot to learn more.

Important Dates

March 7th, 2022: New version of the bot bowl framework released and on main.

May 15th, 2022: We aim to freeze the code base until the competition and will make final release. If very critical bugs are found, we will only fix them after coordinating with everyone on the Bot Bowl Discord server.

July 15th, 2022: Submission Deadline: How to submit.

August 21-24, 2022: Results announced at the IEEE Conference of Games 2022.