diff --git a/mir_eval/chord.py b/mir_eval/chord.py
index e54a1153..3dd5b649 100644
--- a/mir_eval/chord.py
+++ b/mir_eval/chord.py
@@ -261,15 +261,11 @@ def scale_degree_to_bitmap(scale_degree, modulo=False, length=BITMAP_LENGTH):
     "maj9": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1],
     "min9": [1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0],
     "9": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
-    "b9": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
-    "#9": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
     "min11": [1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0],
     "11": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
-    "#11": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
     "maj13": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1],
     "min13": [1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0],
     "13": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
-    "b13": [1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0],
     "1": [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
     "5": [1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0],
     "": [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
diff --git a/test_chord_types.ipynb b/test_chord_types.ipynb
new file mode 100644
index 00000000..4dcddc25
--- /dev/null
+++ b/test_chord_types.ipynb
@@ -0,0 +1,99 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import mir_eval"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# REMOVED\n",
+    "# type problem:  C:b9\n",
+    "# type problem:  C:#9\n",
+    "# type problem:  C:#11\n",
+    "# type problem:  C:b13"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for q in mir_eval.chord.QUALITIES:\n",
+    "    chord_symbol = 'C' + ':'*(len(q)>0) + q\n",
+    "    try:\n",
+    "        x = mir_eval.chord.encode(chord_symbol, reduce_extended_chords=True)\n",
+    "    except:\n",
+    "        print('type problem: ', chord_symbol)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['minmaj7', 'maj9', 'min9', '9', 'b9', '#9', '11', '#11', '13', 'b13', 'min11', 'maj13', 'min13']\n"
+     ]
+    }
+   ],
+   "source": [
+    "extended_qualities = mir_eval.chord.EXTENDED_QUALITY_REDUX\n",
+    "extended_keys = list(extended_qualities.keys())\n",
+    "print(extended_keys)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "(0, array([1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1]), 0)\n"
+     ]
+    }
+   ],
+   "source": [
+    "c = 'C:minmaj7(b9)'\n",
+    "x = mir_eval.chord.encode(c, reduce_extended_chords=True)\n",
+    "print(x)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "mir_eval",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.0"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/tests/test_chord.py b/tests/test_chord.py
index 0e70cf97..402305de 100644
--- a/tests/test_chord.py
+++ b/tests/test_chord.py
@@ -638,3 +638,9 @@ def test_validate():
     # Test that error is thrown on different-length labels
     with pytest.raises(ValueError):
         mir_eval.chord.validate([], ["C"])
+
+# @maximoskp
+# make testing for all chord types
+# quals = mir_eval.chord.QUALITIES
+# for q in quals.keys():
+#     c = mir_eval.chord.encode('C' + (len(q) > 0)*':' + q, reduce_extended_chords=True)
\ No newline at end of file