diff --git a/src/AoC_2024/Dazbo's_Advent_of_Code_2024.ipynb b/src/AoC_2024/Dazbo's_Advent_of_Code_2024.ipynb
index f7be3a1..1ac4766 100644
--- a/src/AoC_2024/Dazbo's_Advent_of_Code_2024.ipynb
+++ b/src/AoC_2024/Dazbo's_Advent_of_Code_2024.ipynb
@@ -9379,12 +9379,17 @@
     "\n",
     "This sequence then repeats.\n",
     "\n",
-    "If we look at the printed output, there are some obvious issues. In my data, I can immediately see issues with `z06`, `z11` and `z31`. So these are going to be part of the answer.  But what else?"
+    "If we look at the printed output, there are some obvious issues. In my data, I can immediately see issues with `z06`, `z11` and `z31`. So these are going to be part of the answer.  But what else?\n",
+    "\n",
+    "Here's how we can solve it:\n",
+    "\n",
+    "- We can run verifications against every `z` output, and check it contains the expected set of rules for a ripple adder.\n",
+    "- "
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 46,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -9470,11 +9475,11 @@
     "    \"\"\" Verify a z value has been properly created. \"\"\"\n",
     "    return verify_output_wire(get_wire_name(\"z\", num), num)\n",
     "\n",
-    "def progress():\n",
+    "def find_first_fail():\n",
     "    i = 0\n",
-    "    \n",
     "    while True:\n",
-    "        if not verify(i): break\n",
+    "        if not verify(i): \n",
+    "            break\n",
     "        i += 1\n",
     "    \n",
     "    return i\n",
@@ -9486,15 +9491,21 @@
     "            op_by_ouput[output] = (left, right, gate)\n",
     "    \n",
     "    swaps = []\n",
-    "\n",
     "    for _ in tqdm(range(swaps_required)):\n",
-    "        baseline = progress()\n",
-    "        for op_x in op_by_ouput:\n",
-    "            for op_y in op_by_ouput:\n",
-    "                if op_x == op_y: continue\n",
+    "        first_fail = find_first_fail() # E.g. 6 for z06\n",
+    "        for op_x in op_by_ouput: # E.g. fkp\n",
+    "            for op_y in op_by_ouput: # E.g. z06\n",
+    "                if op_x == op_y: \n",
+    "                    continue\n",
+    "                \n",
+    "                # Swap these two operations and test if we get more successful verifications\n",
     "                op_by_ouput[op_x], op_by_ouput[op_y] = op_by_ouput[op_y], op_by_ouput[op_x]\n",
-    "                if progress() > baseline:\n",
-    "                    break\n",
+    "                new_first_fail = find_first_fail()\n",
+    "                if new_first_fail > first_fail:\n",
+    "                    first_fail = new_first_fail\n",
+    "                    break # We've swapped this op_x and op_y. Move on to next op_x.\n",
+    "                \n",
+    "                # Unsuccessful, so swap back\n",
     "                op_by_ouput[op_x], op_by_ouput[op_y] = op_by_ouput[op_y], op_by_ouput[op_x]\n",
     "            else:\n",
     "                continue\n",