No save/back keys for this applet yet.
Evan Lipkis MD taught me this when we were in medical school. Once during a game of Cheapo, you can move a unit twice. Hit "Cheapo" before designating the piece you will move. The first of the two moves may not give check or promote a pawn, but it may carry a king to safety over a square that is under attack. If available, the cheapo move must be used to avoid being stalemated.
Thanks to Alex Gustafson for help with the debugging.
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!