diff --git a/Connect4/connect4_cli/connect4_cli/main.swift b/Connect4/connect4_cli/connect4_cli/main.swift
index 5bcc87a..45874ee 100644
--- a/Connect4/connect4_cli/connect4_cli/main.swift
+++ b/Connect4/connect4_cli/connect4_cli/main.swift
@@ -11,60 +11,43 @@ public func scan() -> Int {
     return res!
 }
 
-var chosenCol: Int?
-var wasPlayed = false
-var status: (isOver: Bool, result: Result) = (false, .notOver)
-var currentId: Int
-var currentPlayer: Player
-let p1id = 1, p2id = 2
-let p1name = "Alice", p2name = "Bob the bot"
+var status: (isOver: Bool, result: Result)
+print("nothing yet")
+if let rules = BasicDefaultsNoDiag() {
+    print("rules")
 
-if let rules = BasicDefaultsNoDiag(withMinNbRows: 3,
-                                   withMaxNbRows: 5,
-                                   withMinNbCols: 3,
-                                   withMaxNbCols: 5,
-                                   withNbChipsToAlign: 3) {
-    
-    if var board = Board(withRows: 3,
-                         andWithCols: 3) {
-        
-        if let me = Human(withId: p1id,
-                          withName: p1name,
+    if let board = Board() {
+        print("board")
+
+        if let human = Human(withId: 1,
+                          withName: "Geraldine Humanman",
                           usingScanner: scan) {
-            
-            if let them = Bot(withId: p2id,
-                              withName: p2name) {
-                
-                print(board) // 1st turn
-                while(!(status.isOver)) {
-                    
-                    currentId = rules.getNextPlayer(fromGrid: board.grid,
-                                                    withPlayer1Id: p1id,
-                                                    withPlayer2Id: p2id)
-                    currentPlayer = {
-                        if(me.id == currentId) { return me }
-                        else { return them }
-                    }()
-                    if let chosenCol = currentPlayer.chooseColumn(inBoard: board,
-                                                                  withRules: rules) {
-                        if(board.insertChip(from: currentId,
-                                            atCol: chosenCol)) {
-                            print(board)
-                            status = rules.isGameOver(byPlayer: currentId,
-                                                      onGrid: board.grid)
+            print("human")
+
+            if let bot = Bot(withId: 2,
+                              withName: "Botty McBotFace") {
+                print("bot")
+
+                if let game = Game(withScanner : scan,
+                                   withBoard: board,
+                                   withRules: rules,
+                                   withPlayer1: human,
+                                   withPlayer2: bot) {
+                    print("game")
+
+                    status = game.isOver
+                    print(game.boardString) // 1st turn
+                    while(!(status.isOver)) {
+                        if game.play() {
+                            print(game.boardString)
+                            status = game.isOver
                         }
                     }
-                }
-                
-                print("Game over")
-                switch(status.result) {
-                case .won(let playerId, let victoryTiles):
-                    print("Player \(playerId) won!")
-                    print(board.displayVictory(fromTiles: victoryTiles))
-                default: break; // nothing
+                    
+                    print(game.gameOverString)
+                    
                 }
             }
-            
         }
     }
 }
diff --git a/Connect4/connect4_lib/Sources/connect4_lib/boards/Board.swift b/Connect4/connect4_lib/Sources/connect4_lib/boards/Board.swift
index 67868d8..571183d 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/boards/Board.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/boards/Board.swift
@@ -51,13 +51,14 @@ public struct Board : CustomStringConvertible {
             && 0 <= col && col < nbCols
     }
     
-    static let descriptionMapper : [Int? : String] = [nil : "-", 1 : "X", 2: "O"]
+    static let descriptionMapper : [Int? : String] = [nil : "□", 1 : "X", 2: "O"]
     
     public var description: String {
         var string = String()
         for row in _grid {
             for tile in row {
                 string.append("\(String(describing: Board.descriptionMapper[tile] ?? "@"))")
+                string.append(" ")
             }
             string.append("\n")
         }
@@ -71,7 +72,7 @@ public struct Board : CustomStringConvertible {
         
         var string = String()
         for row in tmpGrid {
-            for tile in row { string.append(tile == nil ? "@" : "$") }
+            for tile in row { string.append(tile == nil ? "□ " : "$ ") }
             string.append("\n")
         }
         return string
diff --git a/Connect4/connect4_lib/Sources/connect4_lib/games/Game.swift b/Connect4/connect4_lib/Sources/connect4_lib/games/Game.swift
index 013781c..b27c70a 100644
--- a/Connect4/connect4_lib/Sources/connect4_lib/games/Game.swift
+++ b/Connect4/connect4_lib/Sources/connect4_lib/games/Game.swift
@@ -2,12 +2,12 @@ import Foundation
 public class Game {
     private let scanner: () -> Int
     private let displayBoard: () -> String
-    private let board: Board
+    private var board: Board
     private let rules: IRules
     private let player1: Player
     private let player2: Player
     
-    init(withScanner scanner: @escaping () -> Int,
+    public init?(withScanner scanner: @escaping () -> Int,
          withBoard board: Board,
          withRules rules: IRules,
          withPlayer1 player1: Player,
@@ -16,9 +16,54 @@ public class Game {
         self.displayBoard = { () -> String in
             return board.description
         }
+        guard(rules.isValid(board)) else { return nil }
         self.board = board
         self.rules = rules
         self.player1 = player1
         self.player2 = player2
     }
+    
+    public var isOver: (isOver: Bool, result: Result) {
+        return rules.isGameOver(byPlayer: getCurrentPlayerId(),
+                                onGrid: board.grid)
+    }
+    
+    public var boardString: String {
+        return board.description
+    }
+    
+    public var gameOverString: String {
+        var string = "Game over"
+        
+        switch(isOver.result) {
+        case .won(let playerId, let victoryTiles):
+            string.append("\nPlayer \(playerId) won!\n")
+            string.append(board.displayVictory(fromTiles: victoryTiles))
+        default: break; // nothing
+        }
+        
+        return string
+    }
+    
+    public func play() -> Bool {
+
+        let currentPlayer = {
+            if(rules.getNextPlayer(fromGrid: board.grid,
+                                   withPlayer1Id: player1.id,
+                                   withPlayer2Id: player2.id) == player1.id) { return player1 } else { return player2 }
+        }()
+        
+        if let chosenCol = currentPlayer.chooseColumn(inBoard: board,
+                                                      withRules: rules) {
+            return board.insertChip(from: currentPlayer.id, atCol: chosenCol)
+        }
+        return false
+    }
+    
+    private func getCurrentPlayerId() -> Int {
+        if(rules.getNextPlayer(fromGrid: board.grid,
+                               withPlayer1Id: player1.id,
+                               withPlayer2Id: player2.id) == player1.id) { return player2.id } else { return player1.id }
+    }
+    
 }