61 CyclicalFigurativeNumbers Minor reductions and some Maybe patterns
59 XORDecryption Brute force using a dictionary file
59 XORDecryption Elegant solution using frequency analysis
58 SpiralPrimes Slow brute force
54 PokerHands Record syntax and typeclass
60 PrimePairSets Unsatisfying brute force solution
documentation
61 CyclicalFigurativeNumbers Minor optimisation and fun with Maybe
58 SpiralPrimes Brute force with scanl
62 CubicPermutations Fast solution using Map
63 PowerfulDigitCounts Powerful one liner
63 PowerfulDigitCounts Powerful one-liner