diff --git a/4forces.xcworkspace/xcuserdata/yorickgeoffre.xcuserdatad/UserInterfaceState.xcuserstate b/4forces.xcworkspace/xcuserdata/yorickgeoffre.xcuserdatad/UserInterfaceState.xcuserstate
index 1a764e8..ef502cb 100644
Binary files a/4forces.xcworkspace/xcuserdata/yorickgeoffre.xcuserdatad/UserInterfaceState.xcuserstate and b/4forces.xcworkspace/xcuserdata/yorickgeoffre.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/4forcesPack/Sources/4forcesPack/Board.swift b/4forcesPack/Sources/4forcesPack/Board.swift
index 8daf431..edccba3 100644
--- a/4forcesPack/Sources/4forcesPack/Board.swift
+++ b/4forcesPack/Sources/4forcesPack/Board.swift
@@ -8,15 +8,25 @@
 import Foundation
 
 public struct Board {
-    private let nbRows = 4
-    private let nbColumn = 4
+    private var nbRows = 4
+    private var nbColumn = 4
     private var grid: [[Int?]]
     
     public init(){
         grid = Array(repeating: Array( repeating: nil, count: nbRows), count: nbColumn)
     }
     
-    public init(input: [[Int?]]){
+    public init?(nbRows: Int, nbCol: Int){
+        guard (nbRows < 1 || nbCol < 1) else {
+            return nil
+        }
+        self.nbColumn = nbCol
+        self.nbRows = nbRows
+        grid = Array(repeating: Array( repeating: nil, count: nbRows), count: nbColumn)
+    }
+    
+    public init?(input: [[Int?]]){
+        guard input[0][0] != nil else {return nil}  //inutile
         grid = input
     }
     
@@ -33,8 +43,8 @@ public struct Board {
     
     public mutating func insertPeice(id: Int, row: Int) -> Bool{
         if(isFull()){
-            //return false
-        };
+            return false
+        }
         
         var colToInsert: Int = nbColumn-1
         
@@ -51,7 +61,7 @@ public struct Board {
         }
         print("jeton ok: ",colToInsert)
         
-        return insertPeice(id: id, row: row, col: colToInsert) && isFull();
+        return insertPeice(id: id, row: row, col: colToInsert) || isFull();
     }
     
     public func isFull()-> Bool{
@@ -72,4 +82,17 @@ public struct Board {
             return grid[row][col]
         }
     }
+    
+    public func toString() -> String{
+        var str: String = ""
+        str += String(repeating: "_", count: (nbColumn*2)+1) + "\n"
+        for collNum in 0...nbColumn-1{    //parcours de la grille du bas vers le haut
+            for rowNum in 0...nbRows-1{
+                str += String("│"+String(grid[rowNum][collNum]!))
+            }
+            str += String("│\n")
+        }
+        str += String(repeating: "¯", count: (nbColumn*2)+1) + "\n"
+        return str
+    }
 }
diff --git a/4forcesPack/Tests/4forcesPackTests/BoardTests.swift b/4forcesPack/Tests/4forcesPackTests/BoardTests.swift
index 61d97ec..a4e2175 100644
--- a/4forcesPack/Tests/4forcesPackTests/BoardTests.swift
+++ b/4forcesPack/Tests/4forcesPackTests/BoardTests.swift
@@ -9,10 +9,11 @@ final class _forcesPackTests: XCTestCase {
         for col in 0...3{
             for n in 0...3{
                 print("----------------------------\niteration", col*4+n)
-                XCTAssertTrue(b.insertPeice(id: 611, row: col))
+                XCTAssertTrue(b.insertPeice(id: 9, row: col))
             }
         }
         
         XCTAssertTrue(b.isFull())
+        print(b.toString())
     }
 }