Risk Bot

A bot made for the SYNCS Bot Battle 2024.

Project Structure

• attack_game contains the majority of the implementation of the attacking logic.
• mcts contains the core search component of the attacking logic.
• json_connection contains tools for connecting to the SYNCS match simulator.
• puct_bot contains an entry point intended to be compiled to WASM to connect to the match simulator.
• risk_bots contains various full Risk bots, including an (approximate) reimplementation of the SYNCS examples, some early attempts, and the main bot.
• risk_engine contains a reimplementation of the SYNCS game engine.
• risk_helper contains a reimplementation of the SYNCS helper library.
• risk_shared contains a reimplementation of the SYNCS shared library.
• sprt contains tools for testing
• spsa contains tools for tuning
• stub.py contains a stub for loading puct_bot for the SYNCS match simulator
• build.sh attempts to build the puct_bot and integrate it with stub.py.

Building

A Rust compiler is required (Nightly is recommended). To use the provided build script, the wasm-wasip1 target should be installed. The full project, excluding the Python stub can be build using:

cargo build --release

The stub can be integrated with the main bot using:

./build.sh

Another WASM bot can be integrated with the stub using

echo "WASM = \"$(base64 --wrap=0 <wasm_file>)\"\n$(cat stub.py)" > bot.py

Limitations

There is a very long list of things the bot is unable to do that it probably should be capable of. These include:

• Splitting troops during attacks
• Targeting or avoiding the top player
• Preventing other players from claiming entire continents during the initial phase
• Intelligently choosing when to redeem cards