Download PORTABLE Chess Engines For Android

I don't know if what I want to do is even possible, so I will explain: when you install a chess engine app, like Komodo or Stockfish, when you execute them you see a message informing that you have to download a GUI app in order to it to work as a fully chess program. What anyone can infer from these messages is that a GUI App can make use of an installed engine in a device.

Is there a way to see the installed engines on the device to show on an select box, and "extract" these engines from the apps, or to find the location of them in the device, or to execute the apps via another way similar to intents?

Download Chess Engines For Android

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The problem is that a chess engine is a software that has to be kept running to avail a position; you send them the position you like them to avail and as they analyse, they keep sending you their avaliation, and they keep doind this until you send them a comand to stop.

But that way I would have a fixed and limited engine list on my app, and I would be leaving out the engines which have no opened source, like Komodo and Houdini. I see that the Chessbase app can use several engines, as you can see in the screenshots in the app's page. They also showed the Komodo engine in the list (as I purchase the app to see)... I have Komodo installed... So they had to do in some other way...

Android NDK is used to compile the c++ into an installable apk (Gradle);

This is why you get a 'splash screen'.With NDK the Engine is treated as a java app by design;and when the developer compiled the engine in android studio they chose that template. In 2021, you can open Android studio --> File--> New --> C++ Native --> previously this option did not exist and NDK was side loaded. You had no choice but to create a template.

The publisher of the OEX app is NOT the Dev. I emailed Karl Schreiner who published many engines on playstore; he replied to me promptly and was very knowledgable but stated he does not compile them or know how. I reached out to the DEV of Acid-Ape-Studio; for which they declined to answer but was nice enough to point me in the direction of Android NDK as the preferred method. (I guess cross-compile is easier then Kotlin Conversion from C-Code)

Use a Linter, Inspector, and Smart Syntax AI if possible.

Your best bet; create a PWA or PWA similar service like Yandex.disk or Web2Android; and even let users post their engines.Edit the PWA Features to Use Lichess API to call EGTB, Bots, and other stuff. Create a Dropdown inside the PWA to download offline tablesbases, offline NNUE, training FEN's, training EPD suites, etc.

(Why LiChess doesn't do personal bots, or host vintage engines with cookies for UCI settings? Or personality bots already?Well they do "Kindof"; you can post your bots, but they need to be hosted somehow by you...and then there's the cheaters).

Workaround for the mostly-technical; You can host your own bot easily with Banksai-GUI and a Lichess BOT API Account. Then fire up your android tablet and challenge the BOT to a game.

Note that you will need an understanding of Bound Services and AIDL which are advanced topics for Android. So as long as a specific chess engine supports interface ccc.chess.engines.IChessEngineService appropriately the GUI app can use the same mechanism to communicate with it.

My friend and I play games against each other on chess.com's app. He has an iPhone, I have an android. After the game, we both ran an analysis on the game within our respective apps. We got back completely different numbers of "good", "inaccuracy", etc. moves! The general trends were the same, but the analysis differed! Am I going crazy, or is this a thing? If so, why?

If not, could someone name an app available on Play Store (with a good UI) which, in addition to allowing the usual functions of game analysis and playing against engines, supports engine vs engine matches, the two engines being different?

Chess for Androidconsists of a chess engine (a Java version derivedfrom the C++ engine BikJump) and a GUI.The application accepts moves through the touch screen, trackball,or keyboard (e2e4 pushes the king pawn, e1g1 castles king side, etc.).An optional "move coach" highlights valid user movesduring input and last played engine move. Full game navigationenables users to correct mistakes or analyze games.Games import and export as FEN/PGN to and from the clipboardor via sharing, load and save as file, or are set up througha position editor. A draw by stalemate, insufficient material,the fifty move rule, or threefold repetition is recognized.The engine plays at various levels (including random, againstitself in auto-play, or free-play, where the game can be usedas a "magnetic chessboard"). The user can play either side and,independently, view the board from the perspective of white or black.

The application supports the Universal Chess Interface (UCI)and Chess Engine Communication Protocol (WinBoard and XBoard),which allows users to play against more powerful third partyengines or even play tournaments between engines(UCI and XBoard Protocols for Android andAndroid chess engines tournaments). Engines are imported in Android Open Exchange format (OEX), inAndroid Chessbase compatible format, or (when allowed) directly from SD card. Engine setup features time control, pondering, infinite analysis,hash tables, multiple threads, endgame tablebases, and opening test suites.The application connects to an external electronic chessboard(Certabo, Chessnut, ChessUp, House of Staunton, DGT, or Millennium) and online to either FICS (Free Internet Chess Server) or ICC (Internet Chess Club).

A1 Chess sadly disappeared from the app store some time ago for unknown reasons. The author Andrew Short is still actively inolved in app development releasing a number of non-chess related apps for Far Stars Games.

There were a range of ways to alter the playing experience including different board themes including a not too unreasonable 3d chess set (though the dark pieces were perhaps a little too dark). A further plus was that Touch Chess included a nice range of separate pgn databases for the user to explore and play through. These were based on the games of well known current and former players but also very usefully included a range of different themes covering tactical minatures, chess traps and common checkmating patterns.

It is not clear when or why the Fritz app was withdrawn. Chessbase the publisher of Fritz subsequently released its own Chessbase database app on both android and apple platforms. In 2015 the Fritz engine (in its Deep Fritz 14 incarnation) became available for use via an update to this app.

I have already downloaded the Stockfish API for Android and Windows from the official site, and the chess AI running on Windows has been completed. However, if I build the project to the Android platform, the engine does not work.

The Universal Chess Interface (UCI)was designed by Stefan Meyer-Kahlen and Rudolf Huberas an open interface between a chess engine and a chessGUI. The interface allows chess programmers to focus onwriting the chess engine, leaving details such as boardsetup and play, clock and notation display, and possiblyopening book and root-level endgame tablebases play tothe GUI. Examples of programs on Windows, Linux, andMac OS with UCI engine support areArena,ChessBase, andSigma Chess.In August 2010, Chess for Androidwas the first program to support UCI on the Android platform.

The Chess Engine Communication Protocol (often simply called theXBoard or WinBoard protocol), designed by Tim Mann and H.G.Muller,provides an alternative protocol between chess engines and a chess GUI.In October 2011, Chess for Androidwas also the first program to support XBoard on the Android platform.

(3) Finally, developers can do all development in C/C++ and generatestand-alone native code using the appropriate compiler toolchain (e.g.CodeSourcery for ARMor the toolchain that ships with the NDK).This third approach is used by Chess for Android toimport engines that do not ship with the application.Users can first get Chess for Android from the Google Play,and later install third party engines from any other (possibly private) source.

Although Chess for Android runs on any Android device,it is important that the engine has been compiled into propernative code for that device. Currently, the Android platformdistinguishes between x86-based devices and ARM-based devices.Any engine binary that has been compiled for 32-bit x86 Linux will workfor x86 Android as well. This format is widely available for many chess engines.Engine binaries compiled for ARM are not as widespread yet, although the list is growing.Some examples are given below.

Before UCI and XBoard engines can be imported in Chess for Android, they first must be installedin internal memory as follows (engines that are shipped in either the Android Open Exchange format (OEX) or theAndroid Chessbase compatible format, such as BikJump Package,do not need this install step; such engines are directly available for import):

NOTE: Applications that target API level 29 and run on Android 10 no longer can install engines fromSD card due to new security-related restrictions on W^X violations. In such cases, only properlypackaged engine binaries can be imported by other chess applications.

To actually import an engine in Chess for Android for game play, goto the UCI and XBoard submenu again, but now pick Import Engineand select the appropriate engine from the list of installed engines.If the import is successful, a window pops up with the engine name andauthor to indicate that the built-in Java chess engine now has beenreplaced by the imported engine (exiting the applicationunloads the engine). Some screenshots are shown below. Also see theChess for Android Manual.

Stockfish has consistently ranked first in most of the chess engine rating lists and, as of December 2023, is the strongest CPU chess engine in the world with an estimated Elo rating of 3546 (CCRL 40/15).[4] It has won all the main events in the Top Chess Engine Championship (TCEC) and the Chess.com Computer Chess Championship (CCC) since 2020. e24fc04721