daxertx/chess — reverse-engineered prompt

Build me a simple C# chess game that I can open and run from the Visual Studio solution.

I want a clean playable board with normal chess rules, legal move checking, turns, check, checkmate, stalemate, castling, promotion, and en passant if possible. It should have a local self play mode where two people can sit at the same computer, an AI mode where I can play against the computer, and an online mode so two people can play each other without sharing the same screen.

Please also add a replay mode where finished games are saved and I can step through the moves one at a time, forward and backward. Keep the interface simple and usable, not fancy. Show whose turn it is, captured pieces if that’s easy, and a clear game over message.

If you need current docs for networking or chess logic, look them up online. Make sure the project builds cleanly and include any basic setup notes.