rename from ChessEngine to Engine

.github/workflows/ci.yml

@@ -23,8 +23,8 @@ jobs:
         shell: pwsh
         run: ./scripts/Verify-SolutionStructure.ps1
       - name: Restore
-        run: dotnet restore ChessRealms.ChessEngine.slnx --locked-mode
+        run: dotnet restore ChessRealms.Engine.slnx --locked-mode
       - name: Release build
-        run: dotnet build ChessRealms.ChessEngine.slnx --configuration Release --no-restore
+        run: dotnet build ChessRealms.Engine.slnx --configuration Release --no-restore
       - name: Fast tests
-        run: dotnet test ChessRealms.ChessEngine.slnx --configuration Release --no-build --filter "TestCategory!=Deep"
+        run: dotnet test ChessRealms.Engine.slnx --configuration Release --no-build --filter "TestCategory!=Deep"

CONTRIBUTING.md

@@ -10,10 +10,10 @@ Run these commands from the repository root:
 
 ```sh
 pwsh -NoProfile -File scripts/Verify-SolutionStructure.ps1
-dotnet sln ChessRealms.ChessEngine.slnx list
-dotnet restore ChessRealms.ChessEngine.slnx --locked-mode
-dotnet build ChessRealms.ChessEngine.slnx -c Release --no-restore
-dotnet test ChessRealms.ChessEngine.slnx -c Release --no-build --filter "TestCategory!=Deep"
+dotnet sln ChessRealms.Engine.slnx list
+dotnet restore ChessRealms.Engine.slnx --locked-mode
+dotnet build ChessRealms.Engine.slnx -c Release --no-restore
+dotnet test ChessRealms.Engine.slnx -c Release --no-build --filter "TestCategory!=Deep"
 git diff --check
 ```
 
@@ -30,7 +30,7 @@ local results; do not infer a CI, Linux, or Visual Studio pass from them.
 
 ## Repository and solution structure
 
-- `ChessRealms.ChessEngine.slnx`: the root solution in XML `.slnx` format.
+- `ChessRealms.Engine.slnx`: the root solution in XML `.slnx` format.
 - `src/`: six projects (engine, tests, console, perft runner, benchmarks, and
   magic-number search). Each project stays in its own physical directory.
 - `docs/`: API documentation, support boundaries, and historical validation records.
@@ -76,7 +76,7 @@ the root and do not need entries in `docs`.
 ## Namespaces and project names
 
 `ChessRealms` is the organization prefix, matching the configured GitHub origin
-`ChessRealms/ChessEngine`. `ChessRealms.ChessEngine` identifies the library;
+`ChessRealms/Engine`. `ChessRealms.Engine` identifies the library;
 suffixes such as `.Tests`, `.Console`, `.Perft`, and `.Benchmark` identify related
 projects by purpose. `ChessRealms.MagicBruteforce` is a supporting tool under the
 same organization. This follows the

ChessRealms.Engine.slnx

@@ -0,0 +1,34 @@
+<Solution>
+  <Folder Name="/docs/" Id="a576d511-a7dd-48da-89d2-a534742656e6">
+    <File Path="docs/dotnet-10-migration.md" />
+    <File Path="docs/game-rules-api.md" />
+    <File Path="docs/game-rules-validation.md" />
+    <File Path="docs/known-issues.md" />
+  </Folder>
+  <Folder Name="/scripts/" Id="9f3eeaa3-c0d2-4d93-af81-f93234779361">
+    <File Path="scripts/Verify-SolutionStructure.ps1" />
+  </Folder>
+  <Folder Name="/Solution Items/">
+    <File Path=".editorconfig" />
+    <File Path=".gitattributes" />
+    <File Path=".gitignore" />
+    <File Path="AGENTS.md" />
+    <File Path="CONTRIBUTING.md" />
+    <File Path="Directory.Build.props" />
+    <File Path="global.json" />
+    <File Path="LICENSE.txt" />
+    <File Path="README.md" />
+  </Folder>
+  <Folder Name="/Solution Items/.github/" />
+  <Folder Name="/Solution Items/.github/workflows/">
+    <File Path=".github/workflows/ci.yml" />
+  </Folder>
+  <Folder Name="/src/" Id="7cc56138-8080-42ef-beb6-c075dac09fd8">
+    <Project Path="src/ChessRealms.Engine.Benchmark/ChessRealms.Engine.Benchmark.csproj" />
+    <Project Path="src/ChessRealms.Engine.Console/ChessRealms.Engine.Console.csproj" />
+    <Project Path="src/ChessRealms.Engine.Perft/ChessRealms.Engine.Perft.csproj" />
+    <Project Path="src/ChessRealms.Engine.Tests/ChessRealms.Engine.Tests.csproj" />
+    <Project Path="src/ChessRealms.Engine/ChessRealms.Engine.csproj" />
+    <Project Path="src/ChessRealms.MagicBruteforce/ChessRealms.MagicBruteforce.csproj" Id="5c55e3ca-2541-4ea4-b4b6-3c5aae87fb9d" />
+  </Folder>
+</Solution>

README.md

@@ -1,4 +1,4 @@
-# ChessEngine
+# Engine
 
 Chess engine with bitboard representation. The core library has no external package
 dependencies. All six projects target .NET 10.
@@ -15,9 +15,9 @@ Run from the repository root:
 ```sh
 dotnet --version
 pwsh -NoProfile -File scripts/Verify-SolutionStructure.ps1
-dotnet restore ChessRealms.ChessEngine.slnx --locked-mode
-dotnet build ChessRealms.ChessEngine.slnx --configuration Release --no-restore
-dotnet test ChessRealms.ChessEngine.slnx --configuration Release --no-build --filter "TestCategory!=Deep"
+dotnet restore ChessRealms.Engine.slnx --locked-mode
+dotnet build ChessRealms.Engine.slnx --configuration Release --no-restore
+dotnet test ChessRealms.Engine.slnx --configuration Release --no-build --filter "TestCategory!=Deep"
 ```
 
 For the ordinary developer loop, run `dotnet test` from the repository root.
@@ -29,7 +29,7 @@ The existing filters and NUnit `Explicit` behavior are unchanged.
 Committed `packages.lock.json` files pin direct and transitive package versions
 and content hashes. CI uses `--locked-mode` to reject dependency drift. When
 intentionally updating packages, run
-`dotnet restore ChessRealms.ChessEngine.slnx --force-evaluate`, review the
+`dotnet restore ChessRealms.Engine.slnx --force-evaluate`, review the
 lock-file changes, and repeat the checks above. When updating the SDK, update
 `global.json` and this README together, then regenerate/review the lock files with
 that SDK. Restore requires access to NuGet.org or a cache containing the locked packages.
@@ -46,7 +46,7 @@ that SDK. Restore requires access to NuGet.org or a cache containing the locked
   opt-in for cost, not failing tests being suppressed. Select them explicitly:
 
 ```sh
-dotnet test ChessRealms.ChessEngine.slnx --configuration Release --no-build --filter "TestCategory=Deep"
+dotnet test ChessRealms.Engine.slnx --configuration Release --no-build --filter "TestCategory=Deep"
 ```
 
 Run both test commands after the Release build, which compiles all tests. Tests,
@@ -61,18 +61,18 @@ that either GitHub Actions job has passed.
 Optional coverage check using the existing VSTest collector:
 
 ```sh
-dotnet test ChessRealms.ChessEngine.slnx -c Release --no-build --filter "TestCategory!=Deep" --collect:"XPlat Code Coverage"
+dotnet test ChessRealms.Engine.slnx -c Release --no-build --filter "TestCategory!=Deep" --collect:"XPlat Code Coverage"
 ```
 
 ### Tool smoke checks
 
 After the Release build, run from the repository root:
 
 ```sh
-dotnet run --project src/ChessRealms.ChessEngine.Perft -c Release --no-build
+dotnet run --project src/ChessRealms.Engine.Perft -c Release --no-build
 dotnet run --project src/ChessRealms.MagicBruteforce -c Release --no-build --no-launch-profile -- 42 1
-dotnet run --project src/ChessRealms.ChessEngine.Benchmark -c Release --no-build -- --job Dry --inProcess --filter "*StartPos_Depth_6*" --wakeLock None
-dotnet run --project src/ChessRealms.ChessEngine.Console -c Release --no-build
+dotnet run --project src/ChessRealms.Engine.Benchmark -c Release --no-build -- --job Dry --inProcess --filter "*StartPos_Depth_6*" --wakeLock None
+dotnet run --project src/ChessRealms.Engine.Console -c Release --no-build
 ```
 
 Perft runs the initial position at depth 6: expect **119,060,324 nodes**.
@@ -139,7 +139,7 @@ See [the complete API guide](docs/game-rules-api.md) for contracts, FEN validati
 FIDE draw rules, compatibility changes and exact dead-position detection limits.
 
 ```csharp
-using ChessRealms.ChessEngine;
+using ChessRealms.Engine;
 
 var game = new ChessGame();
 var moves = game.GetLegalMoves();            // read-only snapshot, initially 20

docs/dotnet-10-migration.md

@@ -1,7 +1,7 @@
 # .NET 10 migration
 
 > Repository organization note: the solution now lives at the repository root
-> as `ChessRealms.ChessEngine.slnx`.
+> as `ChessRealms.Engine.slnx`.
 > Commands and results below preserve the paths used at the time of validation.
 > See [CONTRIBUTING.md](../CONTRIBUTING.md) for current commands.
 

docs/game-rules-api.md

@@ -22,7 +22,7 @@ is rejected when promotion is required. There is no implicit queen. A suffix on
 an ordinary move, e.g. `e2e4q`, is also rejected by the game.
 
 ```csharp
-using ChessRealms.ChessEngine;
+using ChessRealms.Engine;
 
 var game = new ChessGame();
 var legalMoves = game.GetLegalMoves(); // read-only snapshot, initially 20
@@ -121,7 +121,7 @@ not a history/outcome serialization format.
 ## FEN import and export
 
 ```csharp
-using ChessRealms.ChessEngine.Parsing;
+using ChessRealms.Engine.Parsing;
 
 if (ChessGame.TryCreateFromFen("7k/P7/8/8/8/8/8/7K w - - 0 1", out var promotionGame))
 {

docs/game-rules-validation.md

@@ -1,7 +1,7 @@
 # Game-rules validation — 2026-09-10
 
 > Repository organization note: the solution now lives at the repository root
-> as `ChessRealms.ChessEngine.slnx`.
+> as `ChessRealms.Engine.slnx`.
 > Commands and results below preserve the paths used at the time of validation.
 > See [CONTRIBUTING.md](../CONTRIBUTING.md) for current commands.
 
@@ -14,10 +14,10 @@ Local environment: Windows, .NET SDK **10.0.401**, Release configuration.
 
 | Check | Result |
 | --- | --- |
-| `dotnet restore src/ChessRealms.ChessEngine.sln --locked-mode` | Passed; no lock-file changes |
-| `dotnet build src/ChessRealms.ChessEngine.sln -c Release --no-restore` | Passed; all six projects, 0 warnings, 0 errors |
-| `dotnet test src/ChessRealms.ChessEngine.sln -c Release --no-build --filter "TestCategory!=Deep"` | 1010 passed, 0 failed, 0 skipped |
-| `dotnet test src/ChessRealms.ChessEngine.sln -c Release --no-build --filter "TestCategory=Deep"` | 16 passed, 0 failed, 0 skipped; 29 seconds |
+| `dotnet restore src/ChessRealms.Engine.sln --locked-mode` | Passed; no lock-file changes |
+| `dotnet build src/ChessRealms.Engine.sln -c Release --no-restore` | Passed; all six projects, 0 warnings, 0 errors |
+| `dotnet test src/ChessRealms.Engine.sln -c Release --no-build --filter "TestCategory!=Deep"` | 1010 passed, 0 failed, 0 skipped |
+| `dotnet test src/ChessRealms.Engine.sln -c Release --no-build --filter "TestCategory=Deep"` | 16 passed, 0 failed, 0 skipped; 29 seconds |
 | Console scripted smoke | Passed: legal moves, invalid draw claim, Fool's Mate, explicit Black winner, terminal rejection, undo, exact FEN |
 | `git diff --check` | Passed |