This is configurable. You can enable recursion and set a max for the number of iterations. You can implement relaxation-based differential equation solvers that

This is configurable. You can enable recursion and set a max for the number of iterations. You can implement relaxation-based differential equation solvers that way :). Edit: You can also solve Sudoku this way: http://office.microsoft.com/en-us/excel-help/microsoft-excel-blog-building-a-sudoku-solver-using-excel-iterative-calculation-HA010293321.aspx http://office.microsoft.com/en-us/excel-help/microsoft-excel...