diff --git a/src/main/java/featurecat/lizzie/rules/Board.java b/src/main/java/featurecat/lizzie/rules/Board.java
index 8239be7f..603c950d 100644
--- a/src/main/java/featurecat/lizzie/rules/Board.java
+++ b/src/main/java/featurecat/lizzie/rules/Board.java
@@ -412,6 +412,7 @@ public void pass(Stone color, boolean newBranch, boolean dummy, boolean changeMo
       Stone[] stones = history.getStones().clone();
       Zobrist zobrist = history.getZobrist();
       int moveNumber = history.getMoveNumber() + 1;
+      int moveMNNumber = nextMoveMNNumber(newBranch);
       int[] moveNumberList =
           newBranch && history.getNext(true).isPresent()
               ? new int[Board.boardWidth * Board.boardHeight]
@@ -432,6 +433,7 @@ public void pass(Stone color, boolean newBranch, boolean dummy, boolean changeMo
               0.0,
               0,
               0.0);
+      newState.moveMNNumber = moveMNNumber;
       newState.dummy = dummy;
 
       // update leelaz with pass
@@ -451,6 +453,12 @@ public void pass() {
     pass(history.isBlacksTurn() ? Stone.BLACK : Stone.WHITE);
   }
 
+  private int nextMoveMNNumber(boolean newBranch) {
+    boolean isNewSubBranch = newBranch && (history.getCurrentHistoryNode().numberOfChildren() > 0);
+    boolean isMissingMoveMNNumber = history.getMoveMNNumber() < 0;
+    return isNewSubBranch ? 1 : isMissingMoveMNNumber ? -1 : history.getMoveMNNumber() + 1;
+  }
+
   /**
    * Places a stone onto the board representation. Thread safe
    *
@@ -519,12 +527,8 @@ public void place(int x, int y, Stone color, boolean newBranch, boolean changeMo
       Stone[] stones = history.getStones().clone();
       Zobrist zobrist = history.getZobrist();
       Optional<int[]> lastMove = Optional.of(new int[] {x, y});
-      boolean isNewSubBranch =
-          newBranch && (history.getCurrentHistoryNode().numberOfChildren() > 0);
-      boolean isMissingMoveMNNumber = history.getMoveMNNumber() < 0;
       int moveNumber = history.getMoveNumber() + 1;
-      int moveMNNumber =
-          isNewSubBranch ? 1 : isMissingMoveMNNumber ? -1 : history.getMoveMNNumber() + 1;
+      int moveMNNumber = nextMoveMNNumber(newBranch);
       int[] moveNumberList =
           newBranch && history.getNext(true).isPresent()
               ? new int[Board.boardWidth * Board.boardHeight]