diff --git a/CONTRIBUTIONS.md b/CONTRIBUTIONS.md
index aff3295..0a4492b 100644
--- a/CONTRIBUTIONS.md
+++ b/CONTRIBUTIONS.md
@@ -46,7 +46,7 @@ Many thanks to these additional authors:
 * "bale-go" for development and continued work on the 'calibrated rank' AI and rank estimation algorithm.
 * "Dontbtme" for detailed feedback and early testing of v1.0+.
 * "nowoowoo" for a fix to the parser for SGF files with extra line breaks.
-* "nimets123" for the timer sound effects.
+* "nimets123" for the timer sound effects and stone graphics.
 * Jordan Seaward for the stone sound effects.
 * "fohristiwhirl" for the Gibo format parsing code.
 
diff --git a/katrain/core/game.py b/katrain/core/game.py
index 3f715ca..9f8b8cf 100644
--- a/katrain/core/game.py
+++ b/katrain/core/game.py
@@ -161,8 +161,9 @@ class Game:
         except IllegalMoveException:
             self._calculate_groups()
             raise
-        played_node = self.current_node.play(move)
-        self.current_node = played_node
+        with self._lock:
+            played_node = self.current_node.play(move)
+            self.current_node = played_node
         if analyze:
             played_node.analyze(self.engines[played_node.next_player])
         return played_node
diff --git a/katrain/core/game_node.py b/katrain/core/game_node.py
index 74decf9..4a51d23 100644
--- a/katrain/core/game_node.py
+++ b/katrain/core/game_node.py
@@ -230,7 +230,7 @@ class GameNode(SGFNode):
             polmoves = self.policy_ranking
             top_polmove = polmoves[0][1] if polmoves else Move(None)  # if no info at all, pass
             return [
-                {**self.analysis["root"], "pointsLost": 0, "order": 0, "move": top_polmove.gtp()}
+                {**self.analysis["root"], "pointsLost": 0, "order": 0, "move": top_polmove.gtp(),"pv":[top_polmove.gtp()]}
             ]  # single visit -> go by policy/root
 
         root_score = self.analysis["root"]["scoreLead"]
diff --git a/katrain/gui/badukpan.py b/katrain/gui/badukpan.py
index 2241314..4c36c71 100644
--- a/katrain/gui/badukpan.py
+++ b/katrain/gui/badukpan.py
@@ -153,11 +153,11 @@ class BadukPanWidget(Widget):
                         source=f"img/dot.png")
         if innercol:
             Color(*innercol)
-            inner_size = stone_size * 0.75
+            inner_size = stone_size * 0.8
             Rectangle(
                 pos=(self.gridpos_x[x] - inner_size, self.gridpos_y[y] - inner_size),
                 size=(2 * inner_size, 2 * inner_size),
-                source=f"img/last_move_ring.png",
+                source=f"img/inner.png",
             )
 
     def eval_color(self, points_lost, show_dots_for_class: List[bool] = None) -> Optional[List[float]]:
@@ -376,7 +376,6 @@ class BadukPanWidget(Widget):
         game_ended = katrain.game.ended
         current_node = katrain.game.current_node
         player, next_player = current_node.player, current_node.next_player
-        stone_color = STONE_COLORS
 
         with self.canvas.after:
             self.canvas.after.clear()
@@ -448,14 +447,13 @@ class BadukPanWidget(Widget):
     def draw_pv(self, pv, node, up_to_move):
         katrain = self.katrain
         next_last_player = [node.next_player, node.player]
-        stone_color = STONE_COLORS
         cn = katrain.game.current_node
         if node != cn and node.parent != cn:
             hide_node = cn
             while hide_node and hide_node.move and hide_node != node:
                 if not hide_node.move.is_pass:
-                    if False:  # TODO
-                        self.draw_stone(*hide_node.move.coords, [0.85, 0.68, 0.40, 0.8])  # board coloured dot
+                    pos = (self.gridpos_x[hide_node.move.coords[0]],self.gridpos_y[hide_node.move.coords[1]])
+                    draw_circle(pos, self.stone_size, [0.85, 0.68, 0.40, 0.8])
                 hide_node = hide_node.parent
         for i, gtpmove in enumerate(pv):
             if i > up_to_move:
@@ -474,7 +472,13 @@ class BadukPanWidget(Widget):
                 board_coords = (self.gridpos_x[coords[0]], self.gridpos_y[coords[1]])
                 sizefac = 1
 
-            draw_circle(board_coords, self.stone_size * sizefac, stone_color[move_player])
+            stone_size = self.stone_size * sizefac
+            Color(1,1,1,1)
+            Rectangle(
+                pos=(board_coords[0]-stone_size,board_coords[1]-stone_size),
+                size=(2 * stone_size, 2 * stone_size),
+                source=f"img/{move_player}_stone.png",
+            )
             Color(*STONE_TEXT_COLORS[move_player])
             draw_text(pos=board_coords, text=str(i + 1), font_size=self.grid_size * sizefac / 1.45, font_name="Roboto")
 
diff --git a/katrain/gui/style.py b/katrain/gui/style.py
index 5a1920c..4141077 100644
--- a/katrain/gui/style.py
+++ b/katrain/gui/style.py
@@ -46,7 +46,7 @@ LINE_COLOR = [0, 0, 0]
 POLICY_COLOR = [0.9, 0.2, 0.8]
 STARPOINT_SIZE = 0.1
 BOARD_COLOR = [0.85, 0.68, 0.40, 1]
-STONE_SIZE = 0.5
+STONE_SIZE = 0.505 # texture edge is transparent
 VISITS_FRAC_SMALL = 0.1
 
 GHOST_ALPHA = 0.5
diff --git a/katrain/img/inner.png b/katrain/img/inner.png
new file mode 100644
index 0000000..0e1319e
Binary files /dev/null and b/katrain/img/inner.png differ