It's not a constraint programming solver, but rather a linear programming solver. The algorithm the comment above used is "branch and bound" on top of the Simpl

It's not a constraint programming solver, but rather a linear programming solver. The algorithm the comment above used is "branch and bound" on top of the Simplex method to handle the integer constraints. Tutorial here: http://analyticsmadeskeezy.com/2012/08/29/optimal-blending-of-cocaine/ http://analyticsmadeskeezy.com/2012/08/29/optimal-blending-o... Wikipedia here: http://en.wikipedia.org/wiki/Linear_programming http://en.wikipedia.org/wiki/Linear_programming http://en.wikipedia.org/wiki/Simplex_algorithm http://en.wikipedia.org/wiki/Simplex_algorithm http://en.wikipedia.org/wiki/Branch_and_bound http://en.wikipedia.org/wiki/Branch_and_bound