With just a few hours until the final deadline we wanted to congratulate everyone who has stayed with the Challenge to the end. We have been amazed and impressed at your skill and tenacity and have had a real blast reading your solutions and all your posts on the forum. We will be contacting potential winners and medallists shortly, so please do keep checking the site for information and messages from us. If you have any questions then post in the forum or send an email to us at [email protected]. We are really looking forward to meeting some of you at Bletchley on 4th March! All the best, Harry, Jodie and the Elves