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The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 52

The first user who solved this task is Sanja Šabović.

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Rude Wife

Ever since I needed a wheelchair, my wife has been so rude to me.
She's been pushing me around and talking behind my back

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Pump handle removal stops cholera epidemic

In 1854, Dr. John Snow removed the handle of the Broad Street water pump in London, thus effectively halting further spread of cholera. He had mapped the outbreaks, and thus suspected contamination of this community source of water. He was correct in this, one of the most symbolic gestures in the history of public health. Within days after the pump handle was removed, new cases of illness had ceased. Site investigation showed raw sewage from a leaking sewage cesspool that had contaminated the well water. Thus Snow, who was already a celebrated anaesthetist became a pioneer of epidemiology. The "John Snow" pub now stands beside the pink granite slab marking the site of the original pump.«

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