diff --git a/34_Digits/csharp/Game.cs b/34_Digits/csharp/Game.cs
index 2ddab01d..19f225b3 100644
--- a/34_Digits/csharp/Game.cs
+++ b/34_Digits/csharp/Game.cs
@@ -1,36 +1,80 @@
-namespace Digits
+namespace Digits;
+
+internal class GameSeries
 {
-    internal class Game
+    private readonly IReadOnlyList<int> _weights = new List<int> { 0, 1, 3 }.AsReadOnly();
+
+    private readonly IReadWrite _io;
+    private readonly IRandom _random;
+
+    public GameSeries(IReadWrite io, IRandom random)
     {
-        private readonly IReadWrite _io;
-        private readonly IRandom _random;
-
-        public Game(IReadWrite io, IRandom random)
-        {
-            _io = io;
-            _random = random;
-        }
-
-        internal void Play()
-        {
-            _io.Write(Streams.Introduction);
-
-            if (_io.ReadNumber(Prompts.ForInstructions) != 0)
-            {
-                _io.Write(Streams.Instructions);
-            }
-
-            do 
-            {
-                PlayOne();
-            } while (_io.ReadNumber(Prompts.WantToTryAgain) == 1);
-
-            _io.Write(Streams.Thanks);
-        }
-
-        private void PlayOne()
-        {
-
-        }
+        _io = io;
+        _random = random;
     }
-}
\ No newline at end of file
+
+    internal void Play()
+    {
+        _io.Write(Streams.Introduction);
+
+        if (_io.ReadNumber(Prompts.ForInstructions) != 0)
+        {
+            _io.Write(Streams.Instructions);
+        }
+
+        do
+        {
+            new Game(_io, _random).Play();
+        } while (_io.ReadNumber(Prompts.WantToTryAgain) == 1);
+
+        _io.Write(Streams.Thanks);
+    }
+}
+
+internal class Game
+{
+    private readonly IReadWrite _io;
+    private readonly Guesser _guesser;
+
+    public Game(IReadWrite io, IRandom random)
+    {
+        _io = io;
+        _guesser = new Guesser(random);
+    }
+
+    public void Play()
+    {
+        var correctGuesses = 0;
+
+        for (int round = 0; round < 3; round++)
+        {
+            var digits = _io.Read10Digits(Prompts.TenNumbers, Streams.TryAgain);
+
+            correctGuesses = GuessDigits(digits, correctGuesses);
+        }
+
+        _io.Write(correctGuesses switch
+        {
+            < 10 => Streams.YouWin,
+            10 => Streams.ItsATie,
+            > 10 => Streams.IWin
+        });
+    }
+
+    private int GuessDigits(IEnumerable<int> digits, int correctGuesses)
+    {
+        _io.Write(Streams.Headings);
+
+        foreach (var digit in digits)
+        {
+            var guess = _guesser.GuessNextDigit();
+            if (guess == digit) { correctGuesses++; }
+
+            _io.WriteLine(Formats.GuessResult, guess, digit, guess == digit ? "Right" : "Wrong", correctGuesses);
+
+            _guesser.ObserveActualDigit(digit);
+        }
+
+        return correctGuesses;
+    }
+}
diff --git a/34_Digits/csharp/Guesser.cs b/34_Digits/csharp/Guesser.cs
new file mode 100644
index 00000000..debeed18
--- /dev/null
+++ b/34_Digits/csharp/Guesser.cs
@@ -0,0 +1,52 @@
+namespace Digits;
+
+internal class Guesser
+{
+    private readonly IReadOnlyList<int> _weights = new List<int> { 0, 1, 3 }.AsReadOnly();
+    private readonly int[][,] _matrices = new[] { new int[3, 3], new int[9, 3], new int[27, 3] };
+    private readonly int[] _indices = new[] { 2, 8, 26 };
+    private readonly IRandom _random;
+
+    public Guesser(IRandom random)
+    {
+        _random = random;
+
+        for (int j = 0; j < 3; j++)
+        {
+            for (int i = 0; i < 3; i++) { _matrices[0][i, j] = 9; }
+            for (int i = 0; i < 9; i++) { _matrices[1][i, j] = i == 4 * j ? 2 : 3; }
+            for (int i = 0; i < 27; i++) { _matrices[2][i, j] = 1; }
+        }
+    }
+
+    public int GuessNextDigit()
+    {
+        var currentSum = 0;
+        var guess = 0;
+
+        for (int j = 0; j < 3; j++)
+        {
+            var sum = Enumerable.Range(0, 3).Aggregate((s, i) => s + GetWeightedValue(i, j));
+            if (sum > currentSum || _random.NextFloat() >= 0.5)
+            {
+                currentSum = sum;
+                guess = j;
+            }
+        }
+
+        return guess;
+    }
+
+    public void ObserveActualDigit(int digit)
+    {
+        for (int i = 0; i < 3; i++)
+        {
+            _matrices[i][_indices[i], digit]++;
+        }
+        _indices[2] = _indices[2] % 9 * 3 + digit;
+        _indices[1] = _indices[2] % 9;
+        _indices[0] = digit;
+    }
+
+    private int GetWeightedValue(int matrix, int row) => _weights[matrix] * _matrices[matrix][_indices[matrix], row];
+}
\ No newline at end of file
diff --git a/34_Digits/csharp/IOExtensions.cs b/34_Digits/csharp/IOExtensions.cs
new file mode 100644
index 00000000..cd6af7ad
--- /dev/null
+++ b/34_Digits/csharp/IOExtensions.cs
@@ -0,0 +1,20 @@
+namespace Digits;
+
+internal static class IOExtensions
+{
+    internal static IEnumerable<int> Read10Digits(this IReadWrite io, string prompt, Stream retryText)
+    {
+        while (true)
+        {
+            var numbers = new float[10];
+            io.ReadNumbers(prompt, numbers);
+
+            if (numbers.All(n => n == 0 || n == 1 || n == 2))
+            {
+                return numbers.Select(n => (int)n);
+            }    
+
+            io.Write(retryText);
+        }
+    }
+}
\ No newline at end of file
diff --git a/34_Digits/csharp/Program.cs b/34_Digits/csharp/Program.cs
index a427b3c8..1b5dd2e0 100644
--- a/34_Digits/csharp/Program.cs
+++ b/34_Digits/csharp/Program.cs
@@ -3,4 +3,4 @@ global using Games.Common.IO;
 global using Games.Common.Randomness;
 global using static Digits.Resources.Resource;
 
-new Game(new ConsoleIO(), new RandomNumberGenerator()).Play();
\ No newline at end of file
+new GameSeries(new ConsoleIO(), new RandomNumberGenerator()).Play();
\ No newline at end of file
diff --git a/34_Digits/csharp/Resources/GuessResult.txt b/34_Digits/csharp/Resources/GuessResult.txt
new file mode 100644
index 00000000..4e233e03
--- /dev/null
+++ b/34_Digits/csharp/Resources/GuessResult.txt
@@ -0,0 +1 @@
+   {0}              {1}          {2}         {3}
\ No newline at end of file
diff --git a/34_Digits/csharp/Resources/Headings.txt b/34_Digits/csharp/Resources/Headings.txt
index b9ece8ff..8289cdf6 100644
--- a/34_Digits/csharp/Resources/Headings.txt
+++ b/34_Digits/csharp/Resources/Headings.txt
@@ -1 +1,3 @@
+
 My guess      Your no.      Result        No. right
+
diff --git a/34_Digits/csharp/Resources/Resource.cs b/34_Digits/csharp/Resources/Resource.cs
index 0a939802..2e935955 100644
--- a/34_Digits/csharp/Resources/Resource.cs
+++ b/34_Digits/csharp/Resources/Resource.cs
@@ -24,6 +24,11 @@ internal static class Resource
         public static string WantToTryAgain => GetString();
     }
 
+    internal static class Formats
+    {
+        public static string GuessResult => GetString();
+    }
+
     private static string GetString([CallerMemberName] string? name = null)
     {
         using var stream = GetStream(name);
diff --git a/34_Digits/csharp/Resources/TenNumbers.txt b/34_Digits/csharp/Resources/TenNumbers.txt
index 5286066b..ad03893a 100644
--- a/34_Digits/csharp/Resources/TenNumbers.txt
+++ b/34_Digits/csharp/Resources/TenNumbers.txt
@@ -1 +1,2 @@
+
 Ten numbers, please
\ No newline at end of file