docs: function listenForWorkerResults() {
      chessWorker.addEventListener('message', (event) => {
        const gameId = event.data.reqid.gameRootMessage;
        const { ply } = event.data.reqid;
  
        if (event.data.topic === 'dests') {
          const destsMapKey = getDestsKey(gameId, ply);
          const awaitingDestsObs = get(awaitingWorkerResponses, destsMapKey);
  
          if (awaitingDestsObs) {
            const validDests = event.data.payload.dests;
            awaitingDestsObs.set(validDests);
            delete awaitingWorkerResponses[destsMapKey];
          }
        } else if (event.data.topic === 'threefoldTest') {
          const canDrawKey = getDrawKey(gameId, ply);
  
          const awaitingCanDraw = get(awaitingWorkerResponses, canDrawKey);
  
          if (awaitingCanDraw) {
            const canClaimDraw = event.data.payload.threefoldRepetition;
            awaitingCanDraw.set(canClaimDraw);
            delete awaitingWorkerResponses[canDrawKey];
          }
        }
      });
    }