I don't intend to continue maintaining this project. See https://github.com/thomas-daniels/Chess.NET/issues/29#issuecomment-599210147 for the details.

Chess.NET

Chess.NET is a chess library for .NET, written in C#.

It contains the following features:

• Move validation (including castling and en passant).
• Check validation.
• Checkmate and stalemate validation.
• FEN string parsing and game-to-FEN conversion.
• Support of the Atomic chess variant - http://lichess.org/variant/atomic
• Support of the King of the Hill chess variant - https://en.lichess.org/variant/kingOfTheHill
• Support of the Three-check chess variant - https://en.lichess.org/variant/threeCheck
• Support of the Antichess variant - https://en.lichess.org/variant/antichess
• Support of the Horde variant - https://en.lichess.org/variant/horde
• Support of the Racing Kings variant - https://en.lichess.org/variant/racingKings
• Support for claiming draw for the 50 move rule.

Planned features:

• Draw on threefold repetition
• Draw on insufficient mating material

NuGet

Chess.NET is available on NuGet, compiled for .NET Standard 1.3.

https://www.nuget.org/packages/ChessDotNet/
https://www.nuget.org/packages/ChessDotNet.Variants/