diff --git a/index.html b/index.html
index b51533b..d19e932 100644
--- a/index.html
+++ b/index.html
@@ -827,8 +827,9 @@
                         mineChance += 0.03;
 
                         //don't want the chance to get to 100% because that's completely predictable
-                        if (mineChance > 0.8) {
-                            mineChance = 0.8;
+                        // 2/3rds chance is the most likely to create an unsolveable repeating pattern (xxoxxoxxo, etc.)
+                        if (mineChance > 0.666) {
+                            mineChance = 0.666;
                         }
                     }
                 }