Implement an HTML renderer code-golf ascii-art Note: This challenge explaination is very much incomplete - it merely contains ideas that will require revising to form a proper challenge post. The premise of the challenge is to write a program that take an HTML document as an input, and outputs an...

Background Tents and Trees (try here) is a puzzle played on a square (or rectangular) grid, where the objective is to place tents horizontally or vertically adjacent to each of the trees, so that no two tents touch each other in 8 directions (horizontally, vertically, and diagonally) and the numb...

Counting King's Hamiltonian Paths through 3-by-N grid code-golf grid graph-theory combinatorics Background A Hamiltonian path is a path on a graph that steps through its vertices exactly once. On a grid, this means stepping through every cell exactly once. On a square grid, a Chess King can move ...