NChess.Core 0.0.1

.NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. 
dotnet add package NChess.Core --version 0.0.1
                    


                    

                
NuGet\Install-Package NChess.Core -Version 0.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="NChess.Core" Version="0.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="NChess.Core" Version="0.0.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="NChess.Core" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add NChess.Core --version 0.0.1
                    


                    

                
#r "nuget: NChess.Core, 0.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package NChess.Core@0.0.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=NChess.Core&version=0.0.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=NChess.Core&version=0.0.1
                    


                            Install as a Cake Tool

NChess

NChess is pure C# chess core focused on correctness, clarity, and extensibility.
This is an early alpha release (v0.0.1-alpha) intended for engine development, analysis tools, and chess-related experiments.

Status

⚠️ Alpha

The public API is unstable and may change without notice.

Currently implemented:

  • FEN load / save (round-trip safe)
  • Legal move generation
  • Move application and deterministic undo
  • SAN and UCI notation
  • PGN import / export (single game)
  • Castling, en-passant, promotion
  • Debug-friendly board representation

Project Structure

NChess
├─ NChess                // High-level Chess facade
├─ NChess.Console        // Console playground / scratchpad
├─ NChess.Core           // Core chess logic
│  ├─ Common             // Board, Position, Square, etc.
│  ├─ Engine             // Engine abstractions
│  │  └─ Classic         // Reference engine implementation
│  ├─ Fen                // FEN parsing and serialization
│  ├─ Moves              // Move, flags, undo
│  ├─ Notation           // SAN / UCI
│  └─ Pieces             // Piece, PieceType
└─ NChess.Core.Pgn       // PGN import / export

Quick Example

using NChess;

var chess = new Chess();

chess.TryMoveSan("e4", out _);
chess.TryMoveSan("e5", out _);
chess.TryMoveSan("Nf3", out _);

Console.WriteLine(chess.Fen);
Console.WriteLine(chess.ExportPgn());

Supported Formats

  • FEN — load / save
  • SAN — parse and format (with disambiguation)
  • UCI — parse and format
  • PGN — import / export (single game, no variations)

Design Goals

  • Correctness first
  • Deterministic move undo
  • Engine-agnostic architecture
  • Minimal allocations
  • Easy debugging (ASCII board dump)

Non-Goals (for now)

  • Strong evaluation or search
  • Opening books or endgame tables
  • PGN variations
  • GUI
  • Aggressive performance tuning

Target Framework

  • Core library: .NET Standard 2.1
  • Tests / tooling: modern .NET (net6+)

License

MIT (planned)

Version: 0.0.1-alpha
API stability: ❌ not guaranteed
Intended use: internal tools, experiments, learning, engine prototyping

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • .NETStandard 2.1

    • No dependencies.

NuGet packages (1)

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Package Downloads
NChess

Package Description

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Version Downloads Last Updated
0.0.1 175 2/9/2026