1. human-human playing
2. xor piece while user moves it
3. more gnuchess switches
4. a better move parser
5. positions assume that White is on move
6. slow down TwoMachines mode
7. grayscale user-interface colors
8. backwards/forwards for PlayFromFile
9. manual position setup
10. alternate promotion code
11. add time odds to record-file
12. beep to indicate user's move
13. analog clocks, scoresheet text widget, jail
14. -iconic doesn't work correctly
