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Stockfish clones in the AppStore: it's becoming a plague...
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Sven Schüle



Joined: 15 May 2008
Posts: 2246
Location: Berlin, Germany
PostPost subject: Re: Stockfish clones in the AppStore: it's becoming a plague    Posted: Sun May 29, 2011 10:32 pm Reply to topic Reply with quote
tiger wrote:
Evert wrote:
tiger wrote:
Is it OK or not, in a general context, to charge for a copy of Stockfish (either the engine alone or the engine and some GUI), without your explicit consent, provided that the seller abides by the GPL terms?

My limited understanding is that the GPL is incompatible with the App-store. Therefore, to release something through the App-store, you have to change the licence for the App-store release. If you do not own the copyright to the GPL code, you can't do that. Therefore you cannot take someone else's GPL program and sell it in the App-store.
This is different from taking someone's GPL code and selling it on, which is fine as long as you follow the rules laid out by the GPL.

That's my understanding anyway.

But Tord has published Stockfish on the App Store under the GPL licence.

As you mention that, I am not sure whether it would be better to publish the AppStore version under a different license than the GPL, e.g. BSD license.

We have different issues to be understood here:

1. the fact that these Stockfish copies definitely violate the GPL,
2. the fact that the GPL is incompatible to the AppStore rules.

As to 1., in other posts I already gave some reasons for it but there is even more. Only providing the license text "somewhere" and providing "some link" to the Stockfish sources would just not be enough. GPL requires to show, in an appropriate form, information about the license, the rights derived from it, and also about the original copyright holder, to the receiver of a copy (here: a customer who buys the copy). Showing is more than just silently delivering it. The details are much more complex but this is a "compressed version" of what applies here.

Regarding 2., I fully agree to all Evert wrote above. There has been an interesting case last year about GnuGO which was removed from the AppStore after a complaint by the FSF that Apple would violate the GPL by selling GnuGO in the AppStore. In section 7.3 of the iPhone Developer Program License Agreement (Version of 2010 which seems to be the most recent one), the following is stated:
Quote:
In the absence of a separate agreement with Apple, You agree not to distribute Your Application to third parties via other distribution methods or to enable or permit others to do so.

This, together with other paragraphs, seems to manifest the incompatibility to the GPL, even though GPL and OpenSource are explicitly mentioned at some places.

It is also clear from these rules, e.g. from section 4.1 saying
Quote:
You ... warrant that ... none of the Licensed Applications ... violate or infringe any patent or copyright ...

, that once the original copyright holders of Stockfish inform Apple about the facts, these copies would be removed quickly from the AppStore, other actions not being excluded.

Sven
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Subject Author Date/Time
Stockfish clones in the AppStore: it's becoming a plague... Julien MARCEL Sat May 28, 2011 12:11 pm
      Re: Stockfish clones in the AppStore: it's becoming a plague Martin Sedlak Sat May 28, 2011 12:53 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague Tord Romstad Sat May 28, 2011 2:28 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague Bryan Whitby Sat May 28, 2011 3:08 pm
                        Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 5:21 am
                  Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 6:16 am
                        Re: Stockfish clones in the AppStore: it's becoming a plague Tord Romstad Sun May 29, 2011 7:02 am
                              Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 8:11 am
                                    Re: Stockfish clones in the AppStore: it's becoming a plague Tord Romstad Sun May 29, 2011 9:45 am
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 6:59 pm
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Evert Glebbeek Sun May 29, 2011 9:08 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 9:30 pm
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Sven Schüle Sun May 29, 2011 10:32 pm
                                                                  Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 10:49 pm
                                                                        Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun May 29, 2011 10:53 pm
                                                                              Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 11:01 pm
                                                                                    Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun May 29, 2011 11:03 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 11:57 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Alex Brown Mon May 30, 2011 2:01 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Mon May 30, 2011 4:57 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Alex Brown Mon May 30, 2011 9:32 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Eelco de Groot Mon May 30, 2011 11:04 am
                                                                                    Re: Stockfish clones in the AppStore: it's becoming a plague H.G.Muller Tue May 31, 2011 2:19 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Miguel A. Ballicora Tue May 31, 2011 2:39 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Michel Van den Bergh Tue May 31, 2011 2:51 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Eelco de Groot Tue May 31, 2011 3:20 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Tue May 31, 2011 6:09 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Eelco de Groot Tue May 31, 2011 7:24 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Wed Jun 01, 2011 3:19 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Thu Jun 09, 2011 7:00 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Fri Jun 10, 2011 11:23 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Fri Jun 10, 2011 11:44 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sat Jun 11, 2011 10:04 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Jun 11, 2011 12:09 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sat Jun 11, 2011 2:06 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Fri Mar 16, 2012 2:48 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Bigler Fri Mar 16, 2012 3:14 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Ted Wong Fri Mar 16, 2012 3:17 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Gabriel LEPERLIER Sat Mar 17, 2012 5:40 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sat Mar 17, 2012 6:31 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 6:48 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sat Mar 17, 2012 7:05 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 7:10 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sat Mar 17, 2012 9:09 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 9:26 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sat Mar 17, 2012 9:34 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 9:49 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Martin Sedlak Sat Mar 17, 2012 10:27 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 10:39 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steven Atkinson Sat Mar 17, 2012 11:03 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 3:02 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Ron Langeveld Sat Mar 17, 2012 11:26 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 3:09 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steven Atkinson Sun Mar 18, 2012 3:40 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 3:50 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steven Atkinson Sun Mar 18, 2012 3:59 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 4:07 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steven Atkinson Sun Mar 18, 2012 4:04 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 4:09 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Steven Atkinson Sun Mar 18, 2012 4:20 am
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Ronald de Man Sat Mar 17, 2012 11:22 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Mar 17, 2012 11:28 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Ronald de Man Sat Mar 17, 2012 11:53 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Darrel Briley Sat Jun 11, 2011 1:19 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Tue May 31, 2011 6:01 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague H.G.Muller Tue May 31, 2011 6:05 pm
                              Re: Stockfish clones in the AppStore: it's becoming a plague Jon Dart Sun Mar 18, 2012 2:05 pm
                                    Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun Mar 18, 2012 2:15 pm
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Jon Dart Sun Mar 18, 2012 2:30 pm
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun Mar 18, 2012 2:33 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Jon Dart Sun Mar 18, 2012 2:43 pm
                                    Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 2:48 pm
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Jon Dart Sun Mar 18, 2012 2:55 pm
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Steve Maughan Sun Mar 18, 2012 3:08 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Jon Dart Sun Mar 18, 2012 3:30 pm
                                                            Apps with Stockfish engine Stefan Brettschneider Sat Jul 28, 2012 10:55 am
                                                                  Re: Apps with Stockfish engine Julien MARCEL Sat Jul 28, 2012 11:01 am
                                                                        Re: Apps with Stockfish engine Stefan Brettschneider Sat Jul 28, 2012 11:06 am
                              Re: Stockfish clones in the AppStore: it's becoming a plague Bryan Whitby Wed Sep 05, 2012 7:03 am
                                    Re: Stockfish clones in the AppStore: it's becoming a plague john dalhem Thu Sep 06, 2012 5:43 pm
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Tue Sep 25, 2012 6:42 am
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Fri Oct 19, 2012 7:48 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Martin Sedlak Sat Oct 20, 2012 6:22 am
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Stefan Brettschneider Sat Oct 20, 2012 9:38 am
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague John Krush Sat Oct 20, 2012 10:24 am
                                                                  Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat Oct 20, 2012 12:56 pm
                                                                        Re: Stockfish clones in the AppStore: it's becoming a plague Krzych Cybulsky Sat Oct 20, 2012 2:02 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Krzych Cybulsky Sat Oct 20, 2012 2:09 pm
                        Re: Stockfish clones in the AppStore: it's becoming a plague Greg Simpson Sun May 29, 2011 9:11 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague Joshua Shriver Thu Sep 06, 2012 2:42 am
                  Re: Stockfish clones in the AppStore: it's becoming a plague Martin Sedlak Sat Oct 20, 2012 6:21 am
      Re: Stockfish clones in the AppStore: it's becoming a plague F. Bluemers Sat May 28, 2011 1:01 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat May 28, 2011 1:05 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague Andres Valverde Sat May 28, 2011 1:45 pm
                        Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sat May 28, 2011 1:53 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague F. Bluemers Sat May 28, 2011 2:07 pm
      Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sat May 28, 2011 5:21 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague Marco Costalba Sat May 28, 2011 5:46 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 5:23 am
                        Re: Stockfish clones in the AppStore: it's becoming a plague Marco Costalba Sun May 29, 2011 6:46 am
                              Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:07 am
                                    Re: Stockfish clones in the AppStore: it's becoming a plague Marco Costalba Sun May 29, 2011 7:49 am
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 8:13 am
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Gian-Carlo Pascutto Sun May 29, 2011 9:25 am
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun May 29, 2011 9:39 am
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Alfonso Turri Mon May 30, 2011 10:36 pm
                                                                  Re: Stockfish clones in the AppStore: it's becoming a plague Alfonso Turri Mon May 30, 2011 10:47 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Mike Scheidl Sun May 29, 2011 9:56 am
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 6:47 pm
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Tord Romstad Sun May 29, 2011 9:57 am
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Sven Schüle Sun May 29, 2011 11:46 am
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:03 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sun May 29, 2011 12:16 pm
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Julien MARCEL Sun May 29, 2011 12:28 pm
                                                                  Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sun May 29, 2011 6:05 pm
                                                                        Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:21 pm
                                                                              Re: Stockfish clones in the AppStore: it's becoming a plague Gian-Carlo Pascutto Mon May 30, 2011 3:44 pm
                                                                                    Re: Stockfish clones in the AppStore: it's becoming a plague Sven Schüle Mon May 30, 2011 4:37 pm
                                                                                          Re: Stockfish clones in the AppStore: it's becoming a plague Gian-Carlo Pascutto Mon May 30, 2011 10:47 pm
                                                                                    Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Mon May 30, 2011 5:44 pm
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:07 pm
                                                                  Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sun May 29, 2011 8:56 pm
                                                                        Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 10:42 pm
                                                                              Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sun May 29, 2011 11:26 pm
                                                            Re: Stockfish clones in the AppStore: it's becoming a plague Greg Simpson Sun May 29, 2011 9:28 pm
                                                      Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:00 pm
                                          Re: Stockfish clones in the AppStore: it's becoming a plague Bryan Whitby Sun May 29, 2011 8:17 am
                                                Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 8:26 am
                              Re: Stockfish clones in the AppStore: it's becoming a plague H.G.Muller Mon May 30, 2011 6:21 pm
      Re: Stockfish clones in the AppStore: it's becoming a plague Sean Evans Sat May 28, 2011 8:29 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague Alex Brown Sat May 28, 2011 9:34 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague Don Dailey Sat May 28, 2011 9:58 pm
                        Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:21 am
                  Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 5:43 am
      Re: Stockfish clones in the AppStore: it's becoming a plague Roman Hartmann Sun May 29, 2011 7:04 am
            Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 8:18 am
                  Re: Stockfish clones in the AppStore: it's becoming a plague Sven Schüle Sun May 29, 2011 11:40 am
                        Re: Stockfish clones in the AppStore: it's becoming a plague Christophe Théron Sun May 29, 2011 7:25 pm
      Re: Stockfish clones in the AppStore: it's becoming a plague Krzych Cybulsky Sat Oct 20, 2012 2:12 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague H.G.Muller Sat Oct 20, 2012 3:22 pm
            Re: Stockfish clones in the AppStore: it's becoming a plague H.G.Muller Sat Oct 20, 2012 3:23 pm
                  Re: Stockfish clones in the AppStore: it's becoming a plague Asim Pereira Tue Nov 27, 2012 7:46 am
      Re: Stockfish clones in the AppStore: it's becoming a plague Jianzhao Zhu Thu May 23, 2013 9:13 am
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