March Challenge 2017
Xenny and Alternating Tasks
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
July Challenge 2017
IPC Trainers, Calculator , Whats in the Name, Tree Expectancy, Chef and Sign Sequences
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
October Challenge 2017
A Balanced Contest, Counter Test For CHEFSUM, Chef and a great voluntary Program, Max Mex
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
August Cook-Off 2017
Real obtuse, From heaven to earth
September Cook-Off 2017
Statistics Construction, Subsequence Equality
August Lunchtime 2017
Mathison and the Dynamo shuffle, Mathison and pangrams
September Challenge 2018 Division 2
Magician versus Chef, Bad Shuffle, Table Game, Chef and Adventures, War of XORs
October Challenge 2018 Division 2
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit, Chef and Circles
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
India