update comments

Author: kibitzing

examples/OpenEnv_Tutorial.ipynb

@@ -691,9 +691,14 @@
     "\n",
     "```\n",
     "⬜ ⬜ 🔴 ⬜ ⬜\n",
+    "⬜ ⬜ ⬜ ⬜ ⬜\n",
     "⬜ ⬜ ⬜ ⬜ ⬜   Ball\n",
+    "⬜ ⬜ ⬜ ⬜ ⬜\n",
     "⬜ ⬜ ⬜ ⬜ ⬜   falls\n",
+    "⬜ ⬜ ⬜ ⬜ ⬜\n",
     "⬜ ⬜ ⬜ ⬜ ⬜   down\n",
+    "⬜ ⬜ ⬜ ⬜ ⬜\n",
+    "⬜ ⬜ ⬜ ⬜ ⬜\n",
     "⬜ ⬜ 🏓 ⬜ ⬜\n",
     "     Paddle\n",
     "```\n",
@@ -702,7 +707,7 @@
     "<td width=\"60%\">\n",
     "\n",
     "**Rules:**\n",
-    "- 5×5 grid\n",
+    "- 10×5 grid\n",
     "- Ball falls from random column\n",
     "- Move paddle left/right to catch it\n",
     "\n",
@@ -1007,15 +1012,15 @@
     "\n",
     "    def select_action(self, obs: OpenSpielObservation) -> int:\n",
     "        # Parse OpenSpiel observation\n",
-    "        # For Catch: info_state is a flattened 5x5 grid\n",
+    "        # For Catch: info_state is a flattened 10x5 grid\n",
     "        # Ball position and paddle position encoded in the vector\n",
     "        info_state = obs.info_state\n",
     "\n",
     "        # Find ball and paddle positions from info_state\n",
-    "        # Catch uses a 5x5 grid, so 25 values\n",
+    "        # Catch uses a 10x5 grid, so 50 values\n",
     "        grid_size = 5\n",
     "\n",
-    "        # Find positions (ball = 1.0, paddle = 0.5 in the flattened grid)\n",
+    "        # Find positions (ball = 1.0 in the flattened grid, paddle = 1.0 in the last row of the flattened grid)\n",
     "        ball_col = None\n",
     "        paddle_col = None\n",
     "\n",
@@ -1025,7 +1030,7 @@
     "                break\n",
     "\n",
     "        last_row = info_state[-grid_size:]\n",
-    "        paddle_col = last_row.index(1.0)\n",
+    "        paddle_col = last_row.index(1.0) # Paddle\n",
     "\n",
     "        if ball_col is not None and paddle_col is not None:\n",
     "            if paddle_col < ball_col:\n",