diff --git a/module/rdd-resolution-table.js b/module/rdd-resolution-table.js
index e1b373d7..0917997e 100644
--- a/module/rdd-resolution-table.js
+++ b/module/rdd-resolution-table.js
@@ -165,7 +165,8 @@ export class RdDResolutionTable {
     if (difficulte < -10) {
       return duplicate(levelDown.find(levelData => levelData.level == difficulte));
     }
-    return duplicate(RdDResolutionTable.resolutionTable[caracValue][difficulte + 10]);
+    const chances = RdDResolutionTable.resolutionTable[caracValue][difficulte + 10];
+    return chances ? duplicate(chances) :  RdDResolutionTable._computeCell(difficulte, RdDResolutionTable.computeChances(caracValue, difficulte));
   }
 
   /* -------------------------------------------- */
@@ -224,16 +225,26 @@ export class RdDResolutionTable {
 
   /* -------------------------------------------- */
   static _computeRow(caracValue) {
-    let dataRow = [
-      this._computeCell(-10, Math.max(Math.floor(caracValue / 4), 1)),
-      this._computeCell(-9, Math.max(Math.floor(caracValue / 2), 1))
-    ]
-    for (var diff = -8; diff <= 22; diff++) {
-      dataRow[diff + 10] = this._computeCell(diff, Math.max(Math.floor(caracValue * (diff + 10) / 2), 1));
+    let dataRow = [];
+    for (var diff = -10; diff <= 22; diff++) {
+      dataRow[diff + 10] = this._computeCell(diff, RdDResolutionTable._computePercentage(caracValue, diff));
     }
     return dataRow;
   }
 
+  static _computePercentage(caracValue, diff) {
+    if (diff <-10) {
+      return 1;
+    }
+    if (diff == -10){
+      return Math.max(Math.floor(caracValue / 4), 1);
+    } 
+    if (diff == -9) {
+      return Math.max(Math.floor(caracValue / 2), 1)
+    }
+    return Math.max(Math.floor(caracValue * (diff + 10) / 2), 1);
+  }
+
   /* -------------------------------------------- */
   static _computeCell(niveau, percentage) {
     return {