September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation, Chef and Friends
October Challenge 2016
Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs
June Challenge 2017
Triplets, Pairwise union of sets, Xenny and Coin Rankings, Chef and the Feast, A Good Set
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
Vietnam