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- 23:31, 15 December 2006 diff hist +4 m 99 questions/90 to 94 queens examples
- 23:29, 15 December 2006 diff hist +48 99 questions/90 to 94 repair my erroneous "fix" to queens, and generalize
- 22:57, 15 December 2006 diff hist 0 m 99 questions/90 to 94 minor fix to queens
- 18:53, 15 December 2006 diff hist -80 99 questions/90 to 94 P96: simplify Parsec solution
- 18:50, 15 December 2006 diff hist -83 m 99 questions/90 to 94 editorial
- 18:24, 15 December 2006 diff hist +785 99 questions/90 to 94 P98.2: fuse row generation with matching to speed it up a little, and add a guessing phase (stolen from solution 1) after deduction for completeness.
- 16:47, 15 December 2006 diff hist +7 99 questions/90 to 94 tweak 98.1 a little
- 16:08, 15 December 2006 diff hist -10 99 questions/90 to 94 P98: minor simplification to rows
- 13:20, 15 December 2006 diff hist -302 m 99 questions/31 to 41
- 13:11, 15 December 2006 diff hist -337 m 99 questions/11 to 20
- 11:29, 15 December 2006 diff hist +163 99 questions/90 to 94 P98: fail gracefully if constraints are inconsistent
- 03:13, 15 December 2006 diff hist +147 99 questions/90 to 94 P98: caveat on second solution
- 02:54, 15 December 2006 diff hist +61 99 questions/90 to 94 P98: terminate if no more deductions are possible
- 02:46, 15 December 2006 diff hist -15 m 99 questions/90 to 94 minor cleanup to P98.2
- 02:35, 15 December 2006 diff hist +1 H-99: Ninety-Nine Haskell Problems P98 solved
- 02:34, 15 December 2006 diff hist +2,946 99 questions/90 to 94 faster solution to P98
- 01:01, 15 December 2006 diff hist +60 m 99 questions/80 to 89
- 01:00, 15 December 2006 diff hist +60 m 99 questions/70B to 73
- 01:00, 15 December 2006 diff hist +60 m 99 questions/61 to 69
- 01:00, 15 December 2006 diff hist +60 m 99 questions/54A to 60