diff --git a/README.md b/README.md
index 2f76742f7..908b602e6 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ Use `pgx.available_envs() -> Tuple[EnvId]` to see the list of currently availabl
 |<a href="https://en.wikipedia.org/wiki/Chess">Chess</a><br>`"chess"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/chess_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/chess_light.gif" width="60px">| `v2` | *Checkmate opponent's king to win.* |
 |<a href="https://en.wikipedia.org/wiki/Connect_Four">Connect Four</a><br>`"connect_four"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/connect_four_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/connect_four_light.gif" width="60px">| `v0` | *Connect discs, win with four.* |
 |<a href="https://en.wikipedia.org/wiki/Minichess">Gardner Chess</a><br>`"gardner_chess"`|<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/gardner_chess_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/gardner_chess_light.gif" width="60px">| `v0` | *5x5 chess variant, excluding castling.* |
-|<a href="https://en.wikipedia.org/wiki/Go_(game)">Go</a><br>`"go_9x9"` `"go_19x19"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/go-19x19_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/go-19x19_light.gif" width="60px">| `v1` | *Strategically place stones, claim territory.* |
+|<a href="https://en.wikipedia.org/wiki/Go_(game)">Go</a><br>`"go_9x9"` `"go_13x13"` `"go_19x19"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/go-19x19_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/go-19x19_light.gif" width="60px">| `v1` | *Strategically place stones, claim territory.* |
 |<a href="https://en.wikipedia.org/wiki/Hex_(board_game)">Hex</a><br>`"hex"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/hex_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/hex_light.gif" width="60px">| `v0` | *Connect opposite sides, block opponent.* |
 |<a href="https://en.wikipedia.org/wiki/Kuhn_poker">Kuhn Poker</a><br>`"kuhn_poker"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/kuhn_poker_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/kuhn_poker_light.gif" width="60px">| `v1` | *Three-card betting and bluffing game.* |
 |<a href="https://arxiv.org/abs/1207.1411">Leduc hold'em</a><br>`"leduc_holdem"` |<img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/leduc_holdem_dark.gif" width="60px"><img src="https://raw.githubusercontent.com/sotetsuk/pgx/main/docs/assets/leduc_holdem_light.gif" width="60px">| `v0` | *Two-suit, limited deck poker.* |
diff --git a/docs/go.md b/docs/go.md
index 77a8432de..07221ee3a 100644
--- a/docs/go.md
+++ b/docs/go.md
@@ -18,7 +18,7 @@
 ```py
 import pgx
 
-env = pgx.make("go_19x19")  # or "go_9x9"
+env = pgx.make("go_19x19")  # or "go_9x9" , "go_13x13"
 ```
 
 or you can directly load `Go` class
diff --git a/pgx/_src/visualizer.py b/pgx/_src/visualizer.py
index 17e2f3b0f..e2ebe172f 100644
--- a/pgx/_src/visualizer.py
+++ b/pgx/_src/visualizer.py
@@ -356,7 +356,7 @@ def _set_config_by_state(self, _state: State):  # noqa: C901
                     "black",
                     "gray",
                 )
-        elif _state.env_id in ("go_9x9", "go_19x19"):
+        elif _state.env_id in ("go_9x9", "go_13x13", "go_19x19"):
             from pgx._src.dwg.go import _make_go_dwg
 
             self.config["GRID_SIZE"] = 25
diff --git a/pgx/core.py b/pgx/core.py
index 027c451c1..6873317a9 100644
--- a/pgx/core.py
+++ b/pgx/core.py
@@ -47,6 +47,7 @@
     "connect_four",
     "gardner_chess",
     "go_9x9",
+    "go_13x13",
     "go_19x19",
     "hex",
     "kuhn_poker",
@@ -303,7 +304,7 @@ def available_envs() -> Tuple[EnvId, ...]:
 
         ```py
         pgx.available_envs()
-        ('2048', 'animal_shogi', 'backgammon', 'chess', 'connect_four', 'go_9x9', 'go_19x19', 'hex', 'kuhn_poker', 'leduc_holdem', 'minatar-asterix', 'minatar-breakout', 'minatar-freeway', 'minatar-seaquest', 'minatar-space_invaders', 'othello', 'shogi', 'sparrow_mahjong', 'tic_tac_toe')
+        ('2048', 'animal_shogi', 'backgammon', 'chess', 'connect_four', 'go_9x9',' go_13x13', 'go_19x19', 'hex', 'kuhn_poker', 'leduc_holdem', 'minatar-asterix', 'minatar-breakout', 'minatar-freeway', 'minatar-seaquest', 'minatar-space_invaders', 'othello', 'shogi', 'sparrow_mahjong', 'tic_tac_toe')
         ```
 
 
@@ -365,6 +366,10 @@ def make(env_id: EnvId):  # noqa: C901
         from pgx.go import Go
 
         return Go(size=9, komi=7.5)
+    elif env_id == "go_13x13":
+        from pgx.go import Go
+
+        return Go(size=13, komi=7.5)
     elif env_id == "go_19x19":
         from pgx.go import Go