The [Nuclear Risk Tournament](https://www.metaculus.com/tournament/nuclear-risk-forecasting-tournament/
) and its associated questions have reopened for public viewing and forecasting. Initiated in November, 2021—but set private in February of this year—this partnership with Rethink Priorities delivers informative forecasts about nuclear risk outcomes to key decision-makers with a goal of reducing those risks. 
### Why was the tournament hidden?
After Russia invaded Ukraine and public attention became concentrated on the possibility of nuclear escalation, we made the decision to set the tournament private due to our concerns that these high-stakes forecasts could potentially be vulnerable to manipulation. Given the gravity of the topic, and given the role forecasting can play in helping to shape our understanding of complex, highly uncertain outcomes, our team decided it would be prudent to hit pause while we ensured the reliability of our security infrastructure. 

After reviewing and reinforcing the safeguards we have in place, we’re now ready to reopen the Nuclear Risk Tournament to the public.

### If the tournament was set private, why was I still able to view questions prior to this reopening?
Participants who had already forecast in the tournament were still able to access it. Those who had not registered and forecast, however, were unable to. 

### Why can I see the Metaculus Prediction on open questions?
Part of Metaculus’s mission is providing aggregate forecasts to help enrich the public conversation around critical topics in order to promote greater clarity and understanding. Metaculus also seeks to provide a venue for forecasters to grow in skill together while building their forecast track records. In this instance, the former mission is especially salient and important.  

<br />
Thank you for your patience while we reviewed our processes. 

[Click here for the Nuclear Risk Tournament](https://www.metaculus.com/tournament/nuclear-risk-forecasting-tournament/).