Given the 2018 challenge results, I note OR-Tools is https://developers.google.com/optimization/ https://developers.google.com/optimization/ , its introduction

Given the 2018 challenge results, I note OR-Tools is https://developers.google.com/optimization/ https://developers.google.com/optimization/ , its introduction is https://developers.google.com/optimization/introduction/overview https://developers.google.com/optimization/introduction/over... , and the Python version of getting started is https://developers.google.com/optimization/introduction/python https://developers.google.com/optimization/introduction/pyth... . There are an unofficial node.js bindings https://github.com/mapbox/node-or-tools https://github.com/mapbox/node-or-tools .