"Flip-Coin Chess: Does not pay attention to all (or sometimes even any!)
of the threats generated by the opponent's previous move.
Hope Chess: Does pay attention to all the threats generated by the
opponent's previous move, but, before making their current move, does
not check to make sure that all checks, captures, and threats by the
opponent on the next move (in reply to that move) can be safely met.
Real Chess: Not only deals with opponent's threats from the previous
move but, before making their move, also makes sure that the opponent