JustChess: Add take back and save option

Repository

https://github.com/alaskalinuxuser/app_JustChess

Components

as a learner of chess, while playing this game, i noticed that there are some features that can be added to this game, so that both learners and professionals can enjoy playing this game. and that is the component i want to talk about. as a learner, many a time, i made wrong moves that i wish i could take back, but no way to do that. and also, sometime i wish i could save my current game so as to start were i left it any time any day, unfortunately, i could not save, so each time i come to play, i have to start all over again, and this is really not encouraging. as a result of the above, i want to make the bellow suggestions.

Proposal

I want to propose that:

1. the option to allow take back be added to the game. this feature will help newbies or learner have the privilege of taking back their wrong moves.
   However, it should be done in such a way that it can be enabled and disabled from the setting, and when disabled, the take back key should not show on the game interface, but when enabled, it should show. when done this way, professionals and learners can enjoy the game can choose to disable it.
2. Option to save unfinished game so as to continue latter at desired time. This feature will enable users same their games and latter continue from were the left. It should be done in such a way that once the app is launched, continue from saved game should be among the options that comes up . and there should be a save game botton at the top right hand side of the game.
   Kindly see the bellow pictures

Mockups / Examples

Can be switched on and off from setting

When switched on the icon shows at the top left hand side

When switched off, the icon should disappear and show only save game option

Once the app is launched, a saved game icon should be among what shows up

Benefits

The take back feature will really help chess learner as the will have the option to take back a wrong move. Also, given that it will be done in such a way that it can be switch on and off from the setting, users who wish to turn it off can do so . thus every user will still benefit. No one will be left out.
The save game feature will help users complete game it will.

GitHub Account

E.g. https://github.com/djavalord