diff --git a/examples/.ipynb_checkpoints/display_solutions-checkpoint.ipynb b/examples/.ipynb_checkpoints/display_solutions-checkpoint.ipynb
new file mode 100644
index 0000000..9089314
--- /dev/null
+++ b/examples/.ipynb_checkpoints/display_solutions-checkpoint.ipynb
@@ -0,0 +1,56 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "c5f94563",
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "ModuleNotFoundError",
+     "evalue": "No module named 'polyomino'",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mModuleNotFoundError\u001b[0m                       Traceback (most recent call last)",
+      "\u001b[0;32m/tmp/ipykernel_11300/1925078410.py\u001b[0m in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mfrom\u001b[0m \u001b[0mpolyomino\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mboard\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mChessboard\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0;32mfrom\u001b[0m \u001b[0mpolyomino\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mconstant\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mTETROMINOS\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mALL_PENTOMINOS\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;31mModuleNotFoundError\u001b[0m: No module named 'polyomino'"
+     ]
+    }
+   ],
+   "source": [
+    "from polyomino.board import Chessboard\n",
+    "from polyomino.constant import TETROMINOS, ALL_PENTOMINOS"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a990b439",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "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": "3.9.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/examples/display_solutions.ipynb b/examples/display_solutions.ipynb
new file mode 100644
index 0000000..9089314
--- /dev/null
+++ b/examples/display_solutions.ipynb
@@ -0,0 +1,56 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "c5f94563",
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "ModuleNotFoundError",
+     "evalue": "No module named 'polyomino'",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mModuleNotFoundError\u001b[0m                       Traceback (most recent call last)",
+      "\u001b[0;32m/tmp/ipykernel_11300/1925078410.py\u001b[0m in \u001b[0;36m<cell line: 1>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;32mfrom\u001b[0m \u001b[0mpolyomino\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mboard\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mChessboard\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0;32mfrom\u001b[0m \u001b[0mpolyomino\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mconstant\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mTETROMINOS\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mALL_PENTOMINOS\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;31mModuleNotFoundError\u001b[0m: No module named 'polyomino'"
+     ]
+    }
+   ],
+   "source": [
+    "from polyomino.board import Chessboard\n",
+    "from polyomino.constant import TETROMINOS, ALL_PENTOMINOS"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a990b439",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "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": "3.9.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}