Hard_test_board results

OptimalRobotsPlayer successfully worked through the original board that
I uploaded, now called hard_test_board. I let it run to completion. It
checked almost 74 million sequences, finding 61 different solutions that
took 9 moves. This took almost 5 hours, and I do not recall how long it
took to find the first solution; maybe 30-60 minutes. So as expected,
OptimalRobotsPlayer works but is extremely inefficient. Next I want to
build a GUI for setting up the board, and then finally work toward more
efficient game-playing algorithms.