CS50x Puzzle Day at Meta in London

CS50 is back in the United Kingdom! Join us in London on Friday, October 10, 2025, for a CS50x Puzzle Day with the University of Oxford and Meta, with Professor David J. Malan from Harvard, Professor Daniel Wilson from Oxford, Professor Tom Crawford from Oxford (and Cambridge and Tom Rocks Maths), and CS50's alumni and friends from Meta!

CS50x Puzzle Day is an opportunity to collaborate on teams of 2, 3, and 4 to solve a packet of puzzles (i.e., logic problems). Among the event’s goals is to send a message that computer science is more about problem-solving than it is about, say, programming. Puzzles are not programming challenges. No prior CS or programming experience needed, just logic and smarts! No team? No problem! We will help teams form at the event.

Open to anyone who is:

• 18 years old or older, per Meta policy
• Taking or teaching (or has already taken or taught) CS50x or any of CS50's other courses
• Local (or able to travel) to London, United Kingdom

Schedule

• 5pm–6pm Check in, get your CS50 Swag and some pizza!
• 6pm–9pm Puzzle solving
• 9pm–9:30pm Solutions revealed

Quack

Get ready for the first-ever CS50x and Meta Puzzle Day in London! This is your chance to meet and collaborate with classmates on a packet of puzzles (i.e., logic problems). Whether you're a coding pro or just getting started, this event promises a fun and inspiring experience. Don't miss out—register now and be part of this historic event! Quack.
— said the CS50 Duck at cs50.ai

Space is limited. Food and swag will be served.

No preparation (or prior background or experience of any sort!) is expected. But you might find it helpful to peruse Fall 2024’s puzzles and walkthroughs of solutions!

If ticket price would prevent you from attending, email b3V0cmVhY2ggfCBjczUwICEgaGFydmFyZCAhIGVkdQ==.

If you are a student at Oxford (whether taking CS50 or not), email b3V0cmVhY2ggfCBjczUwICEgaGFydmFyZCAhIGVkdQ== for a discount code from your ox.ac.uk address.

Past Quotes

• A good activity to do with friends!
• Difficult, Challenging, but most of all, Memorable!
• Extremely fun but mind boggling at the same time
• Great fun, and I think I even have a few non-grey hairs left!
• Had the best online experience of my life. Got a chance to get to know many people from different countries. Absolutely loved the experience.
• I can describe CS50 Puzzle Day in one word as Awesome. It’s just wonderful, I feel so confident after making new friends from other parts of the world, solving puzzles with them which improved my team coordinating skills. I have learned so much from the competition and my new friends and I would love to take part in this competition every year.
• It was a lot of fun and a great way to use your mind in a different way than you usually do day to day.
• It’s brainwreckingly good!

CS50 itself will again be offered at the University of Oxford in Michaelmas and Hilary terms as well!

Apply to attend in person at Oxford

Apply to attend online through Oxford

Also check out other Contests in London.