My checking-for-check (not checking for checkmate or stalemate) presets for
Chess on a Longer Board with a few pieces added and Maxima managed to reach
the 30-second time limit within 40 moves (from each side).
I had to limit myself to move-checking presets which do not check for
check. (Anyway, the checking-for-check preset for Maxima also has bugs
which are related to baroque capture and the form of the board, and whose
resolution would require even more time from Game Courier).