Hello. I want to do a 2 Player Chess Game in Java.

I have built most of my code following this chess engine on youtube.

https://www.youtube.com/watch?v=a-2uSg4Kvb0&list=PLQV5mozTHmaffB0rBsD6m9VN1azgo5wXl

Here is the link to all of the code: https://www.youtube.com/redirect?redir_token=f9YS04qKtb_H2TtL-9PsQ4SByqF8MTU2NTE1NDY4OEAxNTY1MDY4Mjg4&q=https%3A%2F%2Fskydrive.live.com%2Fredir%3Fresid%3DD4629BC8D856F7D5%21249%26authkey%3D%21ADo3au_1AzYw9nc&v=dqL0L6tNz_M&event=video_description

I do not want to do an engine but rather just a two player interface, where white player moves, and then black, and I am having trouble figuring out how to implement the flipBoard method when you are not playing against computer. can you explain how I would do this without the AlphaBeta string component?