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* Oops. Uncomment the difficulty exceptions! (Also add anotherSimon Tatham2010-01-09
* Proof that check_errors() is sufficient.Simon Tatham2010-01-05
* Refer to group elements by letters instead of numbers, in keepingSimon Tatham2010-01-05
* Add an even more evil (!) game mode, in which it's not madeSimon Tatham2010-01-05
* Yikes! Fix a misaimed 'sizeof' which I only got away with becauseSimon Tatham2010-01-05
* Couple of missing 'static's.Simon Tatham2010-01-01
* New puzzle in 'unfinished'. Essentially, Sudoku for group theorists:Simon Tatham2009-12-30