Crossnumber winners

Are you a winner?

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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.

Twitter  @mscroggs    Website  mscroggs.co.uk    + More articles by Matthew

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