Split out play resolution

07_Basketball/csharp/Defense.cs

@@ -0,0 +1,12 @@
+namespace Basketball;
+
+internal class Defense
+{
+    private float _value;
+
+    public Defense(float value) => Set(value);
+
+    public void Set(float value) => _value = value;
+
+    public static implicit operator float(Defense defense) => defense._value;
+}