'Position' does not contain a definition for 'UnmakeMove' and no accessible extension method 'UnmakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

'Position' does not contain a definition for 'UnmakeMove' and no accessible extension method 'UnmakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

'Position' does not contain a definition for 'MakeMove' and no accessible extension method 'MakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

'Position' does not contain a definition for 'MakeMove' and no accessible extension method 'MakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

'Position' does not contain a definition for 'MakeMove' and no accessible extension method 'MakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

'Position' does not contain a definition for 'UnmakeMove' and no accessible extension method 'UnmakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

Nullability of reference types in value of type '?' doesn't match target type 'GameState'.

'Position' does not contain a definition for 'MakeMove' and no accessible extension method 'MakeMove' accepting a first argument of type 'Position' could be found (are you missing a using directive or an assembly reference?)

An expression cannot be used in this context because it may not be passed or returned by reference

An expression cannot be used in this context because it may not be passed or returned by reference

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Do not declare visible instance fields (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1051)

Use an immutable collection or reduce the accessibility of the non-private readonly field 'PieceBitBoards'. (https://rules.sonarsource.com/csharp/RSPEC-3887)

Use an immutable collection or reduce the accessibility of the non-private readonly field 'OccupancyBitBoards'. (https://rules.sonarsource.com/csharp/RSPEC-3887)