Premove

[LKL1235]

premove function which #27 discussed

Closes #27

[trevorbayless]

Thanks for the PR! I haven't had time to look at it quite yet, but there are some lint errors that need to be addressed.

You can run flake8 locally to verify you have fixed the errors. To do so, in your venv install cli-chess with dev dependencies by using the following command: pip install -e .[dev]. You should then navigate to cli-chess/src/cli_chess and run flake8.

Note: If you have issues with pip install -e .[dev] then try pip install -e '.[dev]'

[trevorbayless]

Thanks again for the PR! I've added some comments to be addressed.

A couple additions to the review:

• The "PreMove" text is not appearing on online games.
• Premoves currently will kill an entire online game session if the pre-move is accepted but is then invalid after the opponent moves. Example: Starting as white, play e4 and premove e5. If the opponent plays e5 the game is then in a bad state. You should be able to replicate this easily in an online game against Stockfish. When quitting cli-chess after this happens, you will see exceptions in the console.

[LKL1235]

Thanks again for the PR! I've added some comments to be addressed.

A couple additions to the review:

• The "PreMove" text is not appearing on online games.
• Premoves currently will kill an entire online game session if the pre-move is accepted but is then invalid after the opponent moves. Example: Starting as white, play e4 and premove e5. If the opponent plays e5 the game is then in a bad state. You should be able to replicate this easily in an online game against Stockfish. When quitting cli-chess after this happens, you will see exceptions in the console.

Thanks for guide, I did fix them and commit