Quiet Move 1.0 component record · August 27, 2026
Arasan 22.3
Classical engine
Local analysis
How the pieces fit
Quiet Move bundles classical Arasan 22.3 as its chess engine and runs it locally on the iPhone. Quiet Move builds the surrounding experience: imports, analysis settings, move classifications, accuracy, Key Moments, explanations, comparisons, review, and training.
ChessKit provides standard chess rules and notation support. The stdendian header is included within the admitted Arasan source. The app bundles these same notices for offline viewing.
Arasan 22.3
Arasan is the open-source chess engine by Jon Dart. Quiet Move pins release v22.3.0 at commit 2dbc0649dc6d4f726f041b4c359308e76ffa5795 and uses its classical engine source under the MIT licence. No Arasan neural model, engine opening-book binary, or tablebase asset is bundled at runtime.
Official project: github.com/jdart1/arasan-chess
Quiet Move also derives its generated offline opening catalogue from Arasan 22.3’s MIT-licensed book/eco text at the same pin, plus a small project-authored Nimzo-Larsen supplement. The app ships the generated position-keyed catalogue, not an Arasan engine opening-book binary.
Read the complete Arasan licence
Arasan Chess Engine Copyright 1994-2021 by Jon Dart ----------------------------------------------------------------------------- LICENSE ----------------------------------------------------------------------------- Arasan chess engine software, including the contents of the src, book, doc, prj, and tests directories of the software archive, is distributed under the following License: Copyright 1994-2021 by Jon Dart 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. ----------------------------------------------------------------------------- Notes: The Arasan user interface, source of which is in the "gui" directory of the Windows source archive, relies on copyrighted chess fonts and is not included under this license. The Arasan Windows GUI (binary and source) and Arasan chess engine binaries from Jon Dart may be freely distributed, provided that: 1. They are distributed in unmodified form. 2. No more than a nominal fee is charged for copying or media.
stdendian
Arasan’s admitted source includes stdendian.h, originally published by Michael Clark and modified by Arasan to use functions instead of macros for byte swapping and to add a Cygwin fix. The preserved source header declares the implementation Public Domain.
From michaeljclark/3b4fd912f6fa8bb598b3. Modified to use functions, not macros, for bswap; added a fix for Cygwin. Public Domain.
ChessKit
Quiet Move uses ChessKit for standard chess rules, legal move generation, FEN serialization, and SAN serialization. ChessKit is Copyright © 2020 Alexander Perechnev and is used under the MIT licence.
Official project: github.com/aperechnev/ChessKit
Read the complete ChessKit licence
MIT License Copyright (c) 2020 Alexander Perechnev 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.