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I am not sure if I understood it correctly or not, but it seems that there is Stockfish Engines OEX, and even though it is a separately installable APK, it is a library intended to be used by other apps. The description says:

To use these engines, you need a chess application that is compatible with the Open Exchange protocol.

But it does not give any further details. I searched Google for OEX, but I got nothing. I searched for "Open Exchange protocol", but the only search result was something about a mail server. This seems to be the source code of the library app but it has no description either.

So, I wonder

  1. Is this "Stockfish Engines OEX" something that a third-party applications call and get the result (like a chess move) from?
  2. If so, how can I use it? For example, how can I start a new game, input a user move and get the AI's chess move?
Damn Vegetables
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3 Answers3

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There's the archived repository Chess Engine Support with with I could successfully discover and use OEX chess engines from my demo application.

From their homepage :

This Android library offers a standardized way for app developers to

provide chess engines to other chess apps

use provided chess engines in other chess apps

The source code is here

(Edit : There are no sources any more there, but you can have a look there)

Notice that the DroidFish application uses this library code

loloof64
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Do you have the latest updates for "Chess Engines OEX" and "Stockfish Engines OEX"?

... Recommended chess GUIs:

  • Chess for All
  • DroidFish
  • Scid on the go
  • Chess PGN Master
  • Chess for Android
  • Chess (Jeroen Carolus)
  • Acid Ape Chess

In these apps you will find an option "Select engine". Follow the further instructions.

Karl Schreiner
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Personally I chose another approach:

  1. I compiled the latest stockfish for android ARM64 v8: https://github.com/official-stockfish/Stockfish/files/9652034/stockfish-armv8-270922.zip

  2. I put the executable in /data/local/tmp/

  3. I ran it with: nc -L -p 50000 stockfish &

  4. from "Chess for android" I just added a network engine pointing at 127.0.0.1 port 50000 and it works perfectly.

Zibri
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