In the world of chess "the task about eight queens" is known since 1850. Her condition is as follows: it is necessary to place 8 queens so that they had no opportunity "to attack" at each other in one course. According to experts, this task has much in common with programming.
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In the picture it seems solved...
Shhhh don't tell anybody! I'm trying to make a million dollars over here!
I have read a little and it seems you are right, Pele, the problem is already solved. Perhaps the price is for a related and unsolved problem. Who is offering this price?
it was solved before !!