August Long Challenge 2017
Chef and Mover, Palindromic Game, Greedy Candidates, Chef and Rainbow Array
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, A Balanced Contest
August Cook-Off 2017
From heaven to earth, Real obtuse
September Cook-Off 2017
Statistics Construction, Subsequence Equality
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
March Challenge 2018 DIV 2
Minions and Voting, Minion Chef and Bananas, Chef and Glove, A Big Sale, Chef and Easy Problem, Mix the Colors
March Cook-off 2018 Division 1
Chef Goes to the Cinema, Chef Restores a Matrix
April Challenge 2018 Division 1
Cutting Plants, Highway Crossing, Count Good Prefixes
May Challenge 2018 Division 1
Fake Binary Search, Dibs on Fibs, Change the Signs
October Challenge 2018 Division 1
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
India