Hm, I can’t seem to reproduce this on my ipad or iphone. Maybe the most recent update patched this?
iOS / iPad Chess app bug - consistent crashes (reproducible)
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Hi, first off, great site and community. Recently became a diamond member and appreciate everything chess.com has to offer!
I have discovered a bug that is 100% reproducible very easily on both iOS and iPad. If you are playing against a computer bot, and hit undo / forward / back more than 3-4 times in a row, the app's history will get corrupted. If you attempt to hit back again or play a different move, the app will crash.
My suspicion (as a developer myself) is that there is a bug in the back/forward history code in the app. It appears too many forward/back actions end up corrupting one of the internal lists. You will see the top bar in the app "loses track" of what's next and will display the wrong moves. Once this happens the app crashes.
The workaround is to hit "home" within the app, which takes you to the main menu. You can then reenter the bot game and will be able to again hit forward/back, but only up to 3-4 times again before causing a crash.
I tried to find a "report bug" button but could not. If the Chess iOS / iPad app accepts bug fixes, I'd be happy to submit a PR myself. Let me know if there's a better place to post this. Thanks!