Chess Openings Explorer

Chess Openings Explorer Free App

Rated 4.22/5 (770) —  Free Android application by Anton Duzenko

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About Chess Openings Explorer

Database of all 2.3M standard games played in 2012 on The Free Internet Chess Server (http://www.freechess.org/)
Sorted by opening moves, white/black win/draw statistics included
Requires 700MB available space on SD card for the uncompressed games database, additionally to the app itself.

Please send your feedback, it will be appreciated

The source code is here: https://github.com/duzenko/chess-opening-explorer

STORAGE issue. Recently I have added code to work around the KitKat sdcard write restrictions. The uncompressed database is now located at "external storagedataAndroidname.duzenko.chessopeningexplorer"
The problem is some vendors, like Samsung, link external storage to internal phone memory. For Samsung devices only the app will try to use "/storage/extSdCard/Android/data/" so that precious internal memory is not used. If you have a non-Samsung device and want the database on your sd card and not in internal mmeory please contact me via email and I will try to add your vendor to the exception list.
BTW Previously the database was kept in "extsdcardChess Opening Explorer". Old files did not get deleted automatically so you should probably do that manually to free the 700 MB of space that the database takes up.

How to Download / Install

Download and install Chess Openings Explorer version 1.10.1 on your Android device!
Downloaded 10,000+ times, content rating: Everyone
Android package: name.duzenko.chessopeningexplorer, download Chess Openings Explorer.apk

All Application Badges

Free
downl.
Android
2.3+
Bug
buster
For everyone
Android app

App History & Updates

What's Changed
1.10.1
Touch-based moves
1.10
Will use CuckooChess to calculate moves from now on
1.9.8
Fixed wrong piece moving when multiple pieces can move
Added menu popup when long click on the chess board
Will proceed to next move when clicked on the menus sequence
Fixed statistics not refreshing when scrolling
1.9.7
Fixed multiple queen bug (thanks to Michael Koontz)
Better fonts (hopefully)
Fixed last empty move
1.9.6
Fixed O-O-O+ (thanks to Michael Koontz)
Version update Chess Openings Explorer was updated to version 1.10.1
Version update Chess Openings Explorer was updated to version 1.9.8
More downloads  Chess Openings Explorer reached 10 000 - 50 000 downloads
More downloads  Chess Openings Explorer reached 5 000 - 10 000 downloads

What are users saying about Chess Openings Explorer

R70%
by R####:

Very good free app, but pls add an exit button

F70%
by F####:

Very good app but needs more database

B70%
by B####:

Excellent app. The developer is extremely helpful. Highly recommended.

R70%
by R####:

Really helpful and interesting

R70%
by R####:

I simply love it. Thanks a lot, Anton.

R70%
by R####:

Fantastic app

R70%
by R####:

addicting

R70%
by R####:

I agree with another person who said database is small. I saw after 1. d4 there was 240k games. The largest database on the internet sports over 6 million games. The largest with amateur games sports over 13 million. I am unsure where you're looking but I don't think you're looking well. On my main tabyia position as white after about 10 moves I saw 15 games. I should see about 150-200 depending on size of database especially when it's an opening explorer.

R70%
by R####:

I'm unable to unhide the menu bar although holding long on chessboard doesn't work. Very poor functions of app despite of nice database.

R70%
by R####:

Its best opening app ....But the simple designs like back button,Save as pgn and analyse this buttons are not availaible.......These are the reasons this app is underrated.........Anyway nice app and keep on updating the files ...Thank you!

R70%
by R####:

Really a nice app.that's one of the best opening preparation software designed for mobile tablet I had ever seen .love it.☺

R70%
by R####:

I would like to use my own .pgn-files with your great app. I'm fine with generating the .txt-file, but how about the .tree-file? Do I need your winutils? Do I have to compile them with Delphi? Or is there another way? Thanks for your help. Great app. I love browsing through the games and being able to watch them to the end. Tanks for making this a free app.

Q70%
by Q####:

I've tried many of the openings apps on the play store, this one stomps them all. Nice job, Anton.

R70%
by R####:

After downloading this much big data I found nothing but an engine. Games of High Rated/Title Holders are not found.

R70%
by R####:

If you work to KGA Bryan CounterGambit you will have the first 14 moves of The Immortal Game to 14.Qf3..the more I use this App the more I find

R70%
by R####:

Patzer Openings Explorer. Why oh why use a database of patzer games when there are master games to be had? Very poor choice by the developer.

R70%
by R####:

I dont care about the database, i like it ! But guys atleast make an option for board color and flip board..thank you

N70%
by N####:

Very good app for the advance beginners & intermediate level players. (Ashok Varma, Online Chess Coach, India)

K70%
by K####:

Need help. There is no menu key. Long click on the chess board does not open the menu

R70%
by R####:

There is need to add stockfish 8 to analyze the actual position and play with and back forward button must be their ....

W70%
by W####:

When I got a new phone, I could not find this app for the life of me. I thought it might have been taken off the market, so I tried a few other similar ones, but none of them had the database and functions this one has. This app is truly underrated, is one of a kind, and is the best on the market.

D70%
by D####:

Brilliant app, five stars. I wanted to ask, what format is the database? Could we substitute it manually with one that we create ourselves? That would be even more brilliant ;)

D70%
by D####:

Few days ago in my game it was gone, but I don't know how to get back. Please gimme proper instructions....

D70%
by D####:

Over 200mb(compressed download), my ELO is under 1700 so not qualified to complain about the quality of The Openings and variations at my stage..Id love the Creator to make a Pro App maybe not Free for expert players with an interactive Database, id gladly buy it to improve my Opening Game even further

F70%
by F####:

Fake. Just having virus

D70%
by D####:

Alas, the database will not extract to my SD card, although it said it was...

D70%
by D####:

A good app to master the art of chess opening. Quite impressive I must say.

D70%
by D####:

Really helpful and interesting

T70%
by T####:

I like this!

D70%
by D####:

Thank you for fixing the extraction error!

Y70%
by Y####:

Now you can continue playing with chess engine!

U70%
by U####:

The database of games used is too small and does not contain important GM games. The result is that the statistics are pretty but basically worthless. I checked a variety of variations where I knew the evaluation and the statistics typically indicated the opposite result is more likely. This is a deal breaker for a serious student. There are publicly available PGN databases of high quality games, for this app to be useful (or even usable) I would need to be able to choose my own database file.

U70%
by U####:

Really a nice app.that's one of the best opening preparation software designed for mobile tablet I had ever seen .love it.☺

W70%
by W####:

It should highlight the pieces which have move in the list and after touching on a piece it should show its possible move from the list.

S70%
by S####:

It can simply make you a wow because such a big opening database you gets for free and it would be certainly helpful, but where is the back button, there is an undo button when you play against cuckochess. But what is the way to get back to one move before position in opening analyzer?. I dreams this apps coupled with that visual openings analyzers interface would be an ideal app. Some one has to create them and it would be a massive hit. I m sorry the back button is as simple as its th mobile back button

U70%
by U####:

Brilliant app, five stars. I wanted to ask, what format is the database? Could we substitute it manually with one that we create ourselves? That would be even more brilliant ;)

B70%
by B####:

Great app to analyse openings!

U70%
by U####:

Really helpful and interesting

N70%
by N####:

My menu bar has disappeared and it says that by touching the board I would get it but it is not working. How do I get it back.

U70%
by U####:

was this app build without menu bar ?


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Rating Distribution

RATING
4.25
770 users

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4

3

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1