Crossnumber winners

Are you a winner?

Before we get on to winners, here is the solution of the Chalkdust prize crossnumber #2:

 6 7 1 2 5 1 1 6 5 5 3 7 6 7 7 4 9 3 9 4 1 0 0 6 2 5 4 8 9 2 1 4 0 9 1 2 2 3 7 1 8 8 4 3 5 9 5 3 8 9 7 3 4 0 1 6 3 1 1 1 8 2 7 2 7 7 7 7 7 7 8 8 8 8 8 8 9 9 7 2 1 4 5 0 8 2 1 8 9 0 1 9 1 8 9 0 8 8 8 8 8 8 8 6 7 6 0 9 4 1 0 9 6 1 2 5 7 6 1 4 5 5 9 0 2 1 2 4 2 1 9 6 0 0 0 1 6 1 0 3 8

The sum of the across clues was $277777800764962$.

Picking the Winners

We received 50 entries of which 38 were correct.

This time, we put all the correct entries in a Santa hat and got our glorious leader, Rafael Prieto Curiel, to pick the winners:

Thank you to everyone who entered the crossnumber competition. The competition will return in issue 3 of Chalkdust in March.

Matthew Scroggs is a PhD student at UCL working on finite and boundary element methods. His website, mscroggs.co.uk, is full of maths and now features a video of him completing a level of Pac-Man optimally.

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Did you win?