Chess Openings Wizard – Mobile Versions (iPad, iPhone, Android)

Last update: 2022-01-16
COW requires Android 5.1 or later.
“Before you read the bug report…”

Chess Openings Wizard is constantly under development to stay current with new engines, best practices, new versions of Windows, Macintosh, iPad, and Android, and the ideas from those who use it every day.

That said, it is risky to make the bug list available to the public. The vast majority of software publishers keep their bug list private so as not to discourage new purchases who might assume that the software has too many problems because everything known about the program is in this list.

Rest assured, Chess Openings Wizard is used by more than 60,000 chess players.

I publish our bug list because:

I personally appreciate it when a software maker tells me about any known problems for programs that I want to purchase.

I think chess players are smart enough to realize that all sophisticated software has bugs, and that listing them publicly is my way of making sure you know it’s being worked on.


Mike Leahy, The Database Man!

Last Report:  January 16th, 2022

Chess Openings WizardLatest BuildReleased
iPad and iPhoneBuild 50March 1, 2020
AndroidBuild 57January 16, 2022
Amazon Android (Kindle Fire)Build 43Cancelled
COW Engine Server for WindowsBuild 8November 12, 2018

Changes in build 57 for Android

This build starts up much faster and hopefully gets around the freezing issue of the last three builds.

Changes in build 54, 55, 56 for Android

UPDATE: These versions are freezing on startup for some people. Build 57 is the fix this.

Fixed bug that complained of “Blocking dialogs no implemented on this platform” when opening ebooks in the 2022 format.

Changes in build 52

This version adds support for Android 10.

Changes in build 50

iOS version now looks much better in dark mode.

Changes in build 49

iOS version now supports iPhone and iPad.

Changes in build 48

Screen layouts are now friendlier for phones and other devices with small screens.

Fixed bug that showed two selected squares when Black was at the bottom of the diagram.

Sorts the ebooks by name.

A button now appears for editing comments (upper right corner) so that scrolling through comments will no longer accidentally trigger the editor.

Diagram now has options for algebraic hints and arrows showing the last move.

Changes in build 43

DropBox optionally overwrites the file in the cloud to allow for syncing (rather than creating a new file).

Added screen with ebook information.

Can delete ebooks.

Can edit comment and candidate font size.

Shows training wizard controls correctly in portrait mode.

Training Wizard setup window scrolls to show all the controls.

Resetting training works properly.

Changes in build 40 and 41

The menu shows “White at Bottom” and “Black at Bottom” correctly.

The comment editing popup steers clear of the popup keyboard.

Landscape shows the engine server’s numeric assessment and Informant rate symbol. (It was missing on some devices.)


In training, when a line ends, show the comments brieflyChuck HLow 
Add algebraic hints to the borders of diagramsbeta testersLowFixed in build 48
Add PGN importbeta testersHigh 
Add comment edit mode (so touching comments doesn’t always trigger editing)Rob F.HighFixed in build 48
Add position setupXavier M.Medium 
Add paste FEN and PGNXavier M.High 
Support iPad keyboardXavier M.Low 
Better themesXavier M.Low 


Dark mode is not supported on iOS.(Many)HighFixed in build 50.
Android version times out during Dropbox synch.Don W.High
Cancel button when deleting ebook doesn’t work. (It can be canceled in the next window.)Gary MLowFixed in build 48
Deleting sample ebooks does not work. Those ebooks reappear the next time the app is run. (That’s the way it was designed so that the samples can be refreshed.)Divergent71LowIndefinite

Macintosh and Windows Versions