diff --git a/Model/Sources/Model/Board.swift b/Model/Sources/Model/Board.swift
index 16ea9fc..03a53cb 100644
--- a/Model/Sources/Model/Board.swift
+++ b/Model/Sources/Model/Board.swift
@@ -10,26 +10,26 @@ import Foundation
 public struct Board {
     let rowNb: Int
     let columnNb: Int
-    var grid: [[Int]]
+    var grid: [[PlayerId]]
     
     init(rowsNb: Int = 6, columnsNb: Int = 7) {
         rowNb = rowsNb
         columnNb = columnsNb
-        grid = Array(repeating: Array(repeating: 0, count: columnsNb), count: rowsNb)
+        grid = Array(repeating: Array(repeating: PlayerId.empty, count: columnsNb), count: rowsNb)
     }
     
-    subscript(row: Int, column: Int) -> Int {
-            get {
-                guard row >= 0 && row < rowNb && column >= 0 && column < columnNb else {
-                    fatalError("Out of board")
-                }
-                return grid[row][column]
+    subscript(row: Int, column: Int) -> PlayerId {
+        get {
+            guard row >= 0 && row < rowNb && column >= 0 && column < columnNb else {
+                fatalError("Out of board")
             }
-            set {
-                guard row >= 0 && row < rowNb && column >= 0 && column < columnNb else {
-                    fatalError("Out of board")
-                }
-                grid[row][column] = newValue
+            return grid[row][column]
+        }
+        set {
+            guard row >= 0 && row < rowNb && column >= 0 && column < columnNb else {
+                fatalError("Out of board")
             }
+            grid[row][column] = newValue
         }
+    }
 }
diff --git a/Model/Sources/Model/Connect4Rules.swift b/Model/Sources/Model/Connect4Rules.swift
new file mode 100644
index 0000000..441ecbb
--- /dev/null
+++ b/Model/Sources/Model/Connect4Rules.swift
@@ -0,0 +1,97 @@
+//
+//  Connect4Rules.swift
+//  
+//
+//  Created by Adam BONAFOS on 14/01/2025.
+//
+
+import Foundation
+public struct Connect4Rules : Rules {
+    let piecesToAlign: Int
+    
+    init(piecesToAlign: Int) {
+        self.piecesToAlign = piecesToAlign
+    }
+    
+    func add(board: inout  Board, position pos: (Int, Int), playerId: PlayerId) -> Bool {
+        var currentRowNb = 0;
+        for var row in board.grid {
+            if row[pos.1] != PlayerId.empty && currentRowNb != 0 {
+                row[currentRowNb - 1] = playerId
+                return true
+            }
+            currentRowNb += 1
+        }
+        return false
+    }
+    
+    func isGameOver(board: Board) -> (Bool, PlayerId) {
+            // Vérification générale avec le nombre de pièces à aligner
+            let maxRow = board.rowNb
+            let maxCol = board.columnNb
+
+            // Vérification horizontale
+            for row in 0..<maxRow {
+                for col in 0..<(maxCol - piecesToAlign + 1) {
+                    if checkLine(board: board, start: (row, col), direction: (0, 1)) {
+                        return (true, board[row, col])
+                    }
+                }
+            }
+
+            // Vérification verticale
+            for col in 0..<maxCol {
+                for row in 0..<(maxRow - piecesToAlign + 1) {
+                    if checkLine(board: board, start: (row, col), direction: (1, 0)) {
+                        return (true, board[row, col])
+                    }
+                }
+            }
+
+            // Vérification diagonale ascendante (\)
+            for row in (piecesToAlign - 1)..<maxRow {
+                for col in 0..<(maxCol - piecesToAlign + 1) {
+                    if checkLine(board: board, start: (row, col), direction: (-1, 1)) {
+                        return (true, board[row, col])
+                    }
+                }
+            }
+
+            // Vérification diagonale descendante (/)
+            for row in 0..<(maxRow - piecesToAlign + 1) {
+                for col in 0..<(maxCol - piecesToAlign + 1) {
+                    if checkLine(board: board, start: (row, col), direction: (1, 1)) {
+                        return (true, board[row, col])
+                    }
+                }
+            }
+
+            // Vérification du match nul (plateau plein)
+            for row in 0..<maxRow {
+                for col in 0..<maxCol {
+                    if board[row, col] == .empty {
+                        return (false, PlayerId.empty)
+                    }
+                }
+            }
+
+        return (true, PlayerId.empty) // Match nul si toutes les cases sont pleines
+        }
+
+        private func checkLine(board: Board, start: (Int, Int), direction: (Int, Int)) -> Bool {
+            var currentPos = start
+            let player = board[start.0, start.1]
+            guard player != .empty else { return false }
+
+            for _ in 1..<piecesToAlign {
+                currentPos = (currentPos.0 + direction.0, currentPos.1 + direction.1)
+                if currentPos.0 < 0 || currentPos.0 >= board.rowNb ||
+                   currentPos.1 < 0 || currentPos.1 >= board.columnNb ||
+                   board[currentPos.0, currentPos.1] != player {
+                    return false
+                }
+            }
+
+            return true
+        }
+}
diff --git a/Model/Sources/Model/Player.swift b/Model/Sources/Model/Player.swift
new file mode 100644
index 0000000..cc3bbc3
--- /dev/null
+++ b/Model/Sources/Model/Player.swift
@@ -0,0 +1,13 @@
+//
+//  File.swift
+//  
+//
+//  Created by Adam BONAFOS on 14/01/2025.
+//
+
+import Foundation
+enum PlayerId {
+    case empty
+    case player1
+    case player2
+}
diff --git a/Model/Sources/Model/Rules.swift b/Model/Sources/Model/Rules.swift
new file mode 100644
index 0000000..4352425
--- /dev/null
+++ b/Model/Sources/Model/Rules.swift
@@ -0,0 +1,12 @@
+//
+//  File.swift
+//  
+//
+//  Created by Adam BONAFOS on 14/01/2025.
+//
+
+import Foundation
+protocol Rules {
+    func add(board: inout Board, position pos: (Int, Int), playerId: PlayerId) -> Bool
+    func isGameOver(board: Board) -> (Bool, PlayerId)
+}
diff --git a/Model/Sources/Model/TicTacToeRules.swift b/Model/Sources/Model/TicTacToeRules.swift
new file mode 100644
index 0000000..93426ad
--- /dev/null
+++ b/Model/Sources/Model/TicTacToeRules.swift
@@ -0,0 +1,21 @@
+//
+//  File.swift
+//  
+//
+//  Created by Adam BONAFOS on 14/01/2025.
+//
+
+import Foundation
+public struct TicTacToeRules: Rules {
+    func add(board: inout Board, position pos: (Int, Int), playerId: PlayerId) -> Bool {
+        if board[pos.0, pos.1] == .empty {
+            board[pos.0, pos.1] = playerId
+            return true
+        }
+        return false
+    }
+    
+    func isGameOver(board: Board) -> (Bool, PlayerId) {
+        <#code#>
+    }
+}