April Challenge 2015
Chef and Array, Chef and Interview, Broken Telephone, Inversion sorting, Chef and Piano Scales, Count Sequences
May Challenge 2015
Chef and Prime Divisors, Set Difference , Chef and new recipe
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
April Challenge 2017
Bear and Clique Distances, Similar Dishes, Bear and Row 01, Chef and Divisor Tree, Bear and Random Grid, Dish Of Life
May Challenge 2017
Blocked websites, Chef and Subsequences, Median of adjacent maximum numbers, Courses in an university, Chef and his daily routine, Gotham PD, Long Sandwich , Chef and Sub Array
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
Thailand