3 files changed, 51 insertions, 0 deletions
diff --git a/DotnetPgn/Models/Enums.cs b/DotnetPgn/Models/Enums.cs
new file mode 100644
index 0000000..893f2fa
--- /dev/null
+++ b/DotnetPgn/Models/Enums.cs
@@ -0,0 +1,18 @@
+namespace DotnetPgn.Models
+{
+    public enum Piece
+    {
+        Pawn,
+        Knight,
+        Bishop,
+        Rook,
+        Queen,
+        King,
+    }
+
+    public enum Player
+    {
+        White,
+        Black,
+    }
+}
+\ No newline at end of file
diff --git a/DotnetPgn/Models/HalfMove.cs b/DotnetPgn/Models/HalfMove.cs
new file mode 100644
index 0000000..b94d77d
--- /dev/null
+++ b/DotnetPgn/Models/HalfMove.cs
@@ -0,0 +1,11 @@
+namespace DotnetPgn.Models
+{
+    public record HalfMove
+    {
+        public int MoveNumber {get; init;}
+        public Player Player { get; init; }
+        public Piece Piece { get; init; }
+        public Square SourceSquare { get; init; }
+        public Square TargetSquare { get; init; }
+    }
+}
+\ No newline at end of file
diff --git a/DotnetPgn/Models/Square.cs b/DotnetPgn/Models/Square.cs
new file mode 100644
index 0000000..a3910d3
--- /dev/null
+++ b/DotnetPgn/Models/Square.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace DotnetPgn.Models
+{
+    public record Square
+    {
+        public char Rank { get; }
+        public int File { get; }
+
+        public Square(char rank, int file)
+        {
+            if (rank < 'a' || rank > 'h')
+                throw new ArgumentException($"Invalid rank '{rank}'.");
+
+            if (file < 1 || file > 8)
+                throw new ArgumentException($"Invalid file '{file}'.");
+
+            Rank = rank;
+            File = file;
+        }
+    }
+}
+\ No newline at end of file