One of the strongest Othello AI Application in the world

See also https://www.egaroucid.nyanyan.dev/en/ for detail

Totally free application

• Egaroucid - GUI application

  • Desktop application for Windows / macOS
  • Japanese / English / Chinese
  • GUI with Siv3D

• Egaroucid for Console - Console application

  • Windows / MacOS / Linux
  • Edax-like format / Go Text Protocol(GTP)
  • English

• Egaroucid for Web - Web application

  • Play on your browser
  • Japanese / English

• Egaroucid Engine Library (experimental C ABI)

  • Use Egaroucid engine from external applications (C/C++/FFI)
  • Search API + legal move / flipped disc API
  • Public API: include/egaroucid/egaroucid.h
  • Detail: https://www.egaroucid.nyanyan.dev/en/library/

• Egaroucid
  • Windows: Download & Install it from Website or GitHub Releases
  • MacOS / Linux: Please build by yourself!
• Egaroucid for Console
  • Windows: Download & Unzip it from Website or GitHub Releases
  • MacOS / Linux: Please build by yourself using g++ or clang! Build Instruction
• Egaroucid for Web
  • Visit Website and play now!

Please contact me here!

• Want to use Egaroucid in your language?
• Want some new commands?
• Have a nice idea to improve?
• Want to be a tester for new version?
• Like this software?

I would like to hear your opinion.

AI-assisted contributions are welcome in Egaroucid. Please follow this policy when you use AI tools for contribution work.

• You may use AI tools to write code and prepare contributions.
• Do not submit contributions that were left entirely to AI. The human contributor must understand the change.
• Review every line of AI-generated code before contributing it.
• The human who used the AI tool is responsible for the contribution and for all AI-assisted code in it.
• If a pull request includes code written with AI assistance, disclose the AI usage in the pull request description.
• For commits that contain AI-generated code, include commit trailers naming the AI tools with Generated-by: and/or Assisted-by:, and add the human reviewer with Signed-off-by:.

Generated-by: Claude
Assisted-by: GitHub Copilot
Signed-off-by: Your Name <your.email@example.com>

• AI-generated pull request descriptions are not prohibited, but writing them yourself, or using AI only for translation, is recommended.
• If you use AI to draft a pull request description, make sure the wording is commonly used and easy to understand. If the meaning is unclear, maintainers may ask follow-up questions or close the pull request without notice.

GNU General Public License v3.0 or later

If you want to use Egaroucid in your project, I can customize and build Egaroucid for you to avoid GPL-infection to your project. Please feel free to contact me here.

Publications related to Egaroucid

• Takuto Yamana, and Junichi Hoshino: Compressing the Evaluation Function With Small-Scale Deep Learning on Othello, IEEE Transactions on Games (2025)
• Takuto Yamana, and Junichi Hoshino: Developing and Evaluating a Strong Othello AI with Small-scale Deep Learning as a Compression, IPSJ Journal, Vol. 65, No. 10, pp. 1545-1553 {Specially Selected Paper}
  • Japanese Title: 小規模な深層学習による圧縮を利用した強力なオセロAIの開発と評価

• Takuto Yamana, and Junichi Hoshino: Development and Evaluation of an Othello Explanation System using Othello AI and LLM, Proceedings of Game Programming Workshop, Vol. 2025, pp.104-111 (2025) {Game Programming Workshop Best Poster Award}
  • Japanese Title: オセロAIとLLMを使用したオセロ解説システムの開発と評価
• 山名琢翔：GPGPUによるαβ法を用いた高速なオセロ探索手法, IPSJ SIG Technical Reports (GI), Vol. 2024-GI-51, No. 26, pp. 1-9 (2024) {Young Encouragement Award}
• Takuto Yamana: Mastering Othello with Deep Learning as a Compression, IPSJ SIG Technical Reports (GI), Vol. 2022-GI-48, No. 5, pp. 1-5 (2022) {Excellent Research Award, and IPSJ Yamashita SIG Research Award}
  • Japanese Title: 深層学習による圧縮を利用した強力なオセロAIの制作

• Takuto Yamana：Is Othello Solved? Let's Make it Clear!, IPSJ Magazine, Vol. 65, No. 3, pp. 134-136 (2024) {Special Commentary}
  • Japanese Title: 「オセロが解けた」を白黒ハッキリさせようじゃないか

Takuto Yamana (a.k.a Nyanyan)

オセロ・Othelloは登録商標です。 TM&© Othello,Co. and MegaHouse