RangeBot

A Chess bot based on Alpha-beta pruning using heuristics, written in python.
Makes use of a basic opening book which covers most of the common opening moves and It uses the 7-Man syzygy endgame tablebases

Performance

• Has a peak rating of 1600 elo on lichess.org
• Beats stockfish level 5 consistently on lichess.org

Play Against this bot

• Issue a challenge on lichess RangeBot
• The bot is pretty slow so make sure to issue challenges with rapid or classical time controls.

Installation

• Clone this repository.
• Create a python virtual environment and install the requirements

$ virtualenv .venv -p python

• Activate the environment and install the requirements

$ pip install -r requirements.txt

• Add lichess token in config.yml
• Then run the bot using

$ python range-bot.py

Create your own Bot

• Clone the lichess-bot repository.
• Create your own engine or download some known chess engine.
• Proceed by following the instructions in the repository.

Future Improvements

• To improve performance of the bot it can be run on pypy3.6.
• Using a transposition table to avoid redundant evaluation.
• Add tecniques to avoid the Horizon Effect.
• Using "killer Move" ordering during search.

Noteable Games