diff --git a/uebung04/chess/Rook.java b/uebung04/chess/Rook.java
new file mode 100644
index 0000000..e2700d0
--- /dev/null
+++ b/uebung04/chess/Rook.java
@@ -0,0 +1,39 @@
+package chess;
+
+import static java.lang.Integer.signum;
+import static java.lang.Math.abs;
+
+public class Rook extends Piece{
+    public Rook(Color color, Board board, int row, int col) {
+        super(color, board, row, col);
+      }
+    
+      @Override
+      public char charRep() {
+        return getColor() == Color.white ? 'r' : 'R';
+      }
+    
+      @Override
+      public String toString() {
+        return "" + getColor() + " rook at (" + getRow() + ", " + getCol() + ")";
+      }
+    
+      @Override
+      public boolean canCapture(Piece other) {
+        if (getBoard() != other.getBoard() || getColor() == other.getColor())
+          return false;
+        if (other.getRow() != getRow() &&
+            other.getCol() != getCol())
+          return false;
+        final int dr = signum(other.getRow() - getRow());
+        final int dc = signum(other.getCol() - getCol());
+        int r = getRow() + dr;
+        int c = getCol() + dc;
+        while (r != other.getRow() || c != other.getCol()) {
+          if (getBoard().pieceAt(r, c) != null) return false;
+          r += dr;
+          c += dc;
+        }
+        return true;
+      }
+}
diff --git a/uebung04/tournament/ByeGame.java b/uebung04/tournament/ByeGame.java
new file mode 100644
index 0000000..1647206
--- /dev/null
+++ b/uebung04/tournament/ByeGame.java
@@ -0,0 +1,53 @@
+package tournament;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Arrays;
+
+public class ByeGame extends Game{
+    private final String player1;
+    private final Game ref;
+    
+    ByeGame(String player1, Game ref){
+        super();
+        this.ref = ref;
+        this.player1 = player1;
+    }
+    
+    public Game getRef() {
+        return ref;
+    }
+
+    @Override
+    public String getPlayer1() {
+        return player1;
+    }
+
+    @Override
+    public String getPlayer2() {
+        return ref.getWinner();
+    }
+
+    @Override
+    public List<String> getAllPlayers() {
+        List<String> players = new ArrayList<String>();
+        players.add(player1);
+        players.addAll(ref.getAllPlayers());
+        return players;
+    }
+
+
+    @Override
+    public List<Game> getAllGames()
+    {
+        List<Game> temp = new ArrayList(Arrays.asList(this.getId()));
+        temp.addAll(ref.getAllGames());
+        return temp;
+    }
+
+    @Override
+    public List<String> getRemaningPlayers() {
+        // TODO Auto-generated method stub
+        throw new UnsupportedOperationException("Unimplemented method 'getRemaningPlayers'");
+    }
+}
diff --git a/uebung04/tournament/Game.java b/uebung04/tournament/Game.java
new file mode 100644
index 0000000..48fb1c3
--- /dev/null
+++ b/uebung04/tournament/Game.java
@@ -0,0 +1,47 @@
+package tournament;
+
+import java.util.List;
+
+public abstract class Game {
+   private static int counter = 0;
+   private final int id;
+   //null nicht notwendig
+   private String winner = null;
+
+
+   protected Game() {
+       this.id = counter++;
+   }
+
+   public int getId(){
+       return this.id;
+   }
+
+   public String getWinner(){
+       return this.winner;
+   }
+
+   public void setWinner(String winner) {
+       String player1 = getPlayer1();
+       System.out.println("Player 1: " + player1);
+       String player2 = getPlayer2();
+       System.out.println("Player 2: " + player2);
+        this.winner = this.winner == null && player1 != null && player2 != null && (winner == player1 || winner == player2) ? this.winner = winner : this.winner;
+   }
+
+   public abstract String getPlayer1();
+
+   public abstract String getPlayer2();
+
+   public abstract List<String> getAllPlayers();
+
+    public abstract List<String> getRemaningPlayers();
+    
+    public abstract List<Game> getAllGames();
+
+   public String toString(){
+      return "Game: " + getId() + " Player: "+ getPlayer1()+ " vs Player: " + getPlayer2() + "Winner is: "+ getWinner();
+   }
+
+
+}
diff --git a/uebung04/tournament/OrdinaryGame.java b/uebung04/tournament/OrdinaryGame.java
new file mode 100644
index 0000000..1ba43e4
--- /dev/null
+++ b/uebung04/tournament/OrdinaryGame.java
@@ -0,0 +1,51 @@
+package tournament;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class OrdinaryGame extends Game{
+    private Game Player1;
+    private Game Player2;
+    public OrdinaryGame(Game Player1, Game Player2)
+    {
+        this.Player1 = Player1;
+        this.Player2 = Player2;
+    }
+    @Override
+    public String getPlayer1()
+    {
+        return Player1.getWinner();
+    }
+    @Override
+    public String getPlayer2()
+    {
+        return Player2.getWinner();
+    }
+    @Override
+    public List<String> getAllPlayers() 
+    {
+        List<String> temp = new ArrayList();
+        temp.addAll(Player1.getAllPlayers());
+        temp.addAll(Player2.getAllPlayers());
+        return temp;
+    }
+    @Override
+    public List<String> getRemaningPlayers()
+    {
+        if(this.getWinner() != null)
+            return new ArrayList<>(Arrays.asList(this.getWinner()));
+        List<String> temp = new ArrayList();
+        temp.addAll(Player1.getRemaningPlayers());
+        temp.addAll(Player2.getRemaningPlayers());
+        return temp;
+    }
+    @Override
+    public List<Game> getAllGames()
+    {
+        List<Game> temp = new ArrayList(Arrays.asList(this.getId()));
+        temp.addAll(Player1.getAllGames());
+        temp.addAll(Player2.getAllGames());
+        return temp;
+    }
+}
\ No newline at end of file
diff --git a/uebung04/tournament/SeededGame.java b/uebung04/tournament/SeededGame.java
new file mode 100644
index 0000000..c39f5c9
--- /dev/null
+++ b/uebung04/tournament/SeededGame.java
@@ -0,0 +1,51 @@
+package tournament;
+
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class SeededGame extends Game{
+    private String player1;
+    private String player2;
+
+    public SeededGame(String player1, String player2) {
+        super();
+        this.player1 = player1;
+        this.player2 = player2;
+    }
+
+    @Override
+    public String getPlayer1()
+    {
+        return player1;
+    }
+
+    @Override
+    public String getPlayer2()
+    {
+        return player2;
+    }
+
+    @Override
+    public List<String> getAllPlayers()
+    {
+        //return new ArrayList<String>(Arrays.asList(player1, player2));
+        return List.of(player1, player2);
+    }
+    
+    @Override
+    public List<String> getRemaningPlayers()
+    {
+        if(this.getWinner() != null)
+            return new ArrayList<>(Arrays.asList(this.getWinner()));
+        List<String> temp = new ArrayList(Arrays.asList(player1,player2));
+        return temp;
+    }
+    @Override
+    public List<Game> getAllGames()
+    {
+        return List.of(this);
+    }
+}
+
diff --git a/uebung04/tournament/Tournament.java b/uebung04/tournament/Tournament.java
new file mode 100644
index 0000000..5375669
--- /dev/null
+++ b/uebung04/tournament/Tournament.java
@@ -0,0 +1,19 @@
+package tournament;
+    
+import java.util.List;
+
+public class Tournament {
+    private final Game finale;
+    private final String name;
+    public Tournament(String name, Game finale)
+    {
+        this.finale = finale;
+        this.name = name;
+    }
+
+    public List<String> getAllPlayers() {return finale.getAllPlayers();}
+
+    public List<Game> getAllGames() {return finale.getAllGames();}
+
+    public List<String> getRemainingPlayers() {return finale.getRemaningPlayers();}
+}