Backtracking: Solving the N-Queens Problem and Python Implementation

A faster Web server: ripping out Apache for Nginx

Explaining a car on Instagram: "During the 1992 Hooters 500 at Atlanta Motor Speedway, four AH‑64 Apache helicopters made a dramatic fly-over in the lead-up to the race — but there’s no record of an Apache serving as the safety car. 🏎️🚁 The roar of helicopters added spectacular flair to a historic race — which featured veteran Richard Petty’s final start, rookie Jeff Gordon’s debut, and a battle for the championship among six drivers. The Apaches created an unforgettable moment in NASCAR spect