Comments are very welcome.
Preset input data serve as an example that can be submitted quickly. The problems should either be closed or the search depth be limited. Computation times are maximally 5 min which allows you to solve problems like Carpenters Square or the problem in the above corner. The easiest way to try out different moves is to go back to this page after the problem has been solved and to specify moves already made and submit it again. If the problem is difficult then you can have a database of intermediate positions saved after the computation and which has to be re-loaded for the next computation.