The N-Queens problem is a classic combinatorial puzzle that asks: "How can N chess queens be placed on an N×N chessboard so that no two queens threaten each other?" This means no two queens can share ...

Interactive 9x9 grid for puzzle input Input validation (only numbers 1-9 allowed) Clear grid functionality Instant solution generation Visual separation of 3x3 boxes ...

Discrete combinatorial optimization has a central role in many scientific disciplines, however, for hard problems we lack linear time algorithms that would allow us to solve very large instances.

Abstract: The climatic sensitivity of new terrain-aware backtracking algorithms is evaluated across 800 locations in the continental USA on a representative synthetic rolling terrain. We find that a ...