おるふぇ碁

ライセンス表記

制定日：2026年10月24日

おるふぇ碁は、次のソフトウェアを使っています。それぞれの著作権表示とライセンスを、ここに掲げます。

1. KataGo(MIT License)

AIの本体です。ブラウザの中で動かすために、WebAssembly にコンパイルして、日本ルールに合わせる変更などを加えています。入手元:https://github.com/lightvector/KataGo

Copyright 2025 David J Wu ("lightvector") and/or other authors of the content in this repository.
(See 'CONTRIBUTORS' file for a list of authors as well as other indirect contributors).

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Additional disclaimer from David J Wu ("lightvector") regarding the above license and KataGo's
repository (https://github.com/lightvector/KataGo):
I am providing code in the repository to you under an open source license. Because this is my
personal repository, the license you receive to my code is from me, and not from any of my employers,
present or past (including Facebook, during part of 2020-2023).

ブラウザ向けの組み込みには、KataGo をもとにした katago-webgpu を使っています。KataGo と同じ MIT License で公開されています。

2. SHA-2 の実装(BSD 3-Clause License)

KataGo に含まれる、Aaron D. Gifford 氏による SHA-2 の実装です(KataGo の作者が一部を変更しています)。

Copyright (c) 2000-2001, Aaron D. Gifford
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

3. JSON for Modern C++(MIT License)

KataGo に含まれる、Niels Lohmann 氏による JSON のライブラリです(版 3.8.0)。入手元:https://github.com/nlohmann/json

Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.

Permission is hereby  granted, free of charge, to any  person obtaining a copy
of this software and associated  documentation files (the "Software"), to deal
in the Software  without restriction, including without  limitation the rights
to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

4. Eigen(Mozilla Public License 2.0)

AIの計算に使う、行列計算のライブラリです(版 3.4.0)。入手元:https://gitlab.com/libeigen/eigen。ライセンスの全文:https://www.mozilla.org/MPL/2.0/

ブラウザで速く動かすために、次の2つのファイルを書き換えています。書き換えたあとのソースコードは、元のファイルへの差分として、こちらで公開しています。元のソースコードは、上の入手元から入手できます。

5. ビルドの道具

AIを WebAssembly にするために、Emscripten(MIT License / University of Illinois/NCSA Open Source License)と、WebGPU の部品である Dawn(BSD 3-Clause License)を使っています。生成したファイルに、これらの一部が含まれます。

6. AIのモデル

AIが読み込むデータ(学習済みのネットワーク、b10c128)は、KataGo プロジェクトが公開している g170 系のネットワークです。入手元:https://katagoarchive.org/g170/neuralnets/index.html

KataGo の公式サイトの Neural Network License のページによると、g170 の学習で作られたネットワークには、CC0(パブリックドメインに近い、著作権を放棄する宣言)が適用されます。

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