Mathematics
Maths quirk explains why crosswords are so hard – until they aren’t
The process of solving a crossword puzzle is mathematically similar to well-studied physical systems – but one property makes the game unique
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The process of solving a crossword puzzle is mathematically similar to well-studied physical systems – but one property makes the game unique
Alan Turing's theories about computation seem to have a startling consequence, placing hard limits on how fast or slow any physical process in the universe can grow