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Say you have a pizza with a diameter of 1 foot and with 2 straight cuts you cut it into 4 slices of equal shape and size (in the most obvious way, nothing tricky involved here). Can you fit these slices into a square box with sides smaller than 1 foot without overlap? What would such a configuration look like? (I know of two different solutions, one better (and more elegant) than the other)

Erich Friedman is looking at the general case in his Math Magic this month and the best known answers can be found here.

I am not aware of any issue on our end, but if it happens more often feel free to let us know.

Fascinating. And Maarten managed to walk around with a straight face for all these years.

We will take care of this.

"Mathematicians have discovered that a Sudoku puzzle must provide at least 17 starting numbers, or clues, in order to be valid. Any fewer will not produce a unique answer." - http://www.newscientist.com/blogs/shortsharpscience/2012/01/sudoku-mystery-solved.html

The paper can be found here: http://arxiv.org/PS_cache/arxiv/pdf/1201/1201.0749v1.pdf

A great 2012 to everyone!!

The T-shirts have arrived and we're shipping them over the next few days.

Hi PuzzleScott,

We have indeed not implemented these suggestions yet, but I do think we should seriously consider providing some sort of undo functionality.

Hi JHe! Indeed it is not possible to remove your own posts at this point, but we regularly scan the forums and remove posts like these.