Constraint Solving is a computational technique used to find states that satisfy a set of conditions or limitations. It's a quest for harmony, where every piece fits within defined boundaries, crucial for Optimization and many areas of Artificial Intelligence.
Prominent constraint solvers include Z3 (developed by Microsoft Research), Gecode, and Choco. These tools provide frameworks for defining constraints and efficient algorithms to find solutions, applicable in fields like Scheduling, Verification, and Design.