diff --git a/Connect4/connect4_lib/Sources/connect4_lib/players/Bot.swift b/Connect4/connect4_lib/Sources/connect4_lib/players/Bot.swift
index 271fb3f..68b92b6 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/players/Bot.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/players/Bot.swift
@@ -1,5 +1,7 @@
 import Foundation
 
 class Bot: Player {
-    
+    override func playBetween(min: Int, andMaxIncl maxIncl: Int) -> Int {
+        return Int.random(in: min..<maxIncl + 1)
+    }
 }
diff --git a/Connect4/connect4_lib/Sources/connect4_lib/players/Human.swift b/Connect4/connect4_lib/Sources/connect4_lib/players/Human.swift
index fecc4ab..b5e8115 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/players/Human.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/players/Human.swift
@@ -1 +1,4 @@
 import Foundation
+class Human: Player {
+    
+}
diff --git a/Connect4/connect4_lib/Sources/connect4_lib/players/Player.swift b/Connect4/connect4_lib/Sources/connect4_lib/players/Player.swift
index 41b4c50..66b487d 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/players/Player.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/players/Player.swift
@@ -1,8 +1,18 @@
-//
-//  File.swift
-//  
-//
-//  Created by etudiant on 2023-01-31.
-//
-
 import Foundation
+
+class Player {
+    
+    let id: Int
+    
+    init(withId id: Int){
+        self.id = id
+    }
+
+    ///
+    /// should be considered abstract and overridden by descendants
+    internal func playBetween(min: Int, andMaxIncl maxIncl: Int) -> Int {
+        return -1
+    }
+    
+}
+
diff --git a/Connect4/connect4_lib/Sources/connect4_lib/players/SmarterBot.swift b/Connect4/connect4_lib/Sources/connect4_lib/players/SmarterBot.swift
index 2f48581..dfaea87 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/players/SmarterBot.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/players/SmarterBot.swift
@@ -1,8 +1,4 @@
-//
-//  File.swift
-//  
-//
-//  Created by etudiant on 2023-02-01.
-//
-
 import Foundation
+class SmarterBot: Bot {
+    
+}