Othello AI Egaroucid

Egaroucid [ɪɡɑɻˈəʊsid] is an Othello app with one of the strongest othello solver AI.

Download Egaroucid 7.6.0

Lineup

Completely free software. Egaroucid and Egaroucid for Console use the same (strong) engine, but Egaroucid for Web uses a simple (weaker) engine.

Competitive Results

• Othello AI Tournament Champion @Generic Game Server (2024/12/08)
• CodinGame Othello World Champion (2021/11/22, 2023/09/08, 2025/02/01)

Features

• Accurate and fast evaluation function
• Fast search
• Play against AI
  • on Egaroucid's GUI
  • on other GUI with Go Text Protocol (GTP) (Egaroucid for Console)
    • GoGui
    • Quarry
• Analyze a game
• See evaluation values
• Input and Output in several formats
• Create / Modify book automatically / manually
• Add Egaroucid's / Edax's book
• Show opening name
• Beautiful GUI powered by Siv3D

How to Install Egaroucid

Egaroucid

Please visit download page and download installer, then install Egaroucid.

Egaroucid for Console

Please read how to install Egaroucid for Console and download or build it.

Egaroucid for Web

You don't need to do anything special. Please just visit Egaroucid for Web page and play now.

Official Documents

There are some official documents of Egaroucid written in Japanese. Please translate it by yourself.

• How to Use Egaroucid: Explains how to use the software one by one
• Book Usage: Explains how to use Egaroucid's book
• Technology Explanation: Technical explanation for Othello AI programmers

Articles that introduce Egaroucid

• Egaroucid: An Othello app review: Review of Egaroucid by World Othello Federation

Looking for your voice

Via this Google form, you can send me messages such as:

• I found a bug!
• I want to use Egaroucid in my language!
• I want some new functions!
• I have a good idea to improve!
• I want to participate in user tests!

I would like to hear your voice! Please contact me freely!

Welcome your contribution on Egaroucid

Egaroucid is an open source software under GPL-3.0 license. All source codes are available on GitHub here. I welcome your contributions such as pull requests!

When you want to use Egaroucid in your own software

You can use Egaroucid freely under GPL-3.0 license. If you worry about GPL-infection, please ask me.

Acknowledgements

I would like to thank these people for great contributions.

• UI Design
  • Kaneko Eizo
• Technical Contribution / GitHub Contribution
  • Toshihiko Okuhara
  • Hayato Sasakura
  • acepck
  • HiraokaTakuya
  • Ben Stokmans
  • seigot
• Translation
  • ZhangHengge (Chinese)
• Technical Advice
  • Jon Marc Hornstein
• Opening names Provision
  • Uenon
  • Matthias Berg
• Book Provision
  • Gunnar Andersson
• User Test
  • Ben Seeley
  • Wanryu
  • OGA NAO
  • Satoshi Kurahashi
  • Taiki Demoto
  • Mathica
  • Nettle
  • okojoMK
  • Takada Seigo
  • madaranuko
  • Nagano Yasushi
  • trineutron
  • Kuruton

Links

• Egaroucid GitHub Repository
• The Weakest Othello AI
• My Website
• My Twitter

Other Othello AIs

Recent great Othello AIs:

• Edax 4.4 Strong and famous. Egaroucid borrows many ideas from Edax.
• Edax 4.5 Edax 4.4 optimized for AVX. Strong and very fast. Egaroucid borrows some ideas from Edax 4.5.
• Master Reversi Strong and very fast.
• FOREST Uses alpha-beta pruning with neural-network-based evaluation function. The accuracy of its evaluation function is very good.
• dekunobou An unique Othello AI which uses alpha-beta pruning with an evaluation function optimized by genetic algorithm. The developer is also famous for shogi AI.
• WZebra Development stopped in around 2005. Egaroucid's default book is based on WZebra's book under a permission of its developer. Although the development has already stopped, I would like to introduce it with respect.
• Logistello The first Othello AI to win against world champion Takeshi Murakami in 1997. The idea of this AI is used in Egaroucid even now. Although the development has already stopped, I would like to introduce it with respect.

Creator

Takuto Yamana