Bill Tutte breaking the Lorenz cipher in a fortnight using only pen and paper, and having never even seen the machine surely has to at least count as impressiv

Bill Tutte breaking the Lorenz cipher in a fortnight using only pen and paper, and having never even seen the machine surely has to at least count as impressive. https://en.wikipedia.org/wiki/W._T._Tutte#Diagnosing_the_cipher_machine https://en.wikipedia.org/wiki/W._T._Tutte#Diagnosing_the_cip...