lots of things

app/src/main/java/chess/io/commands/SurrenderCommand.java

@@ -0,0 +1,24 @@
+package chess.io.commands;
+
+import chess.io.Command;
+import chess.io.CommandResult;
+import chess.io.OutputSystem;
+import chess.model.Color;
+import chess.model.Game;
+
+public class SurrenderCommand extends Command {
+
+	private final Color player;
+
+	public SurrenderCommand(Color player) {
+		this.player = player;
+	}
+
+	@Override
+	public CommandResult execute(Game game, OutputSystem outputSystem) {
+		outputSystem.hasSurrendered(player);
+		outputSystem.winnerIs(Color.getEnemy(player));
+		return CommandResult.NotMoved;
+	}
+	
+}