May Challenge 2017
Courses in an university, Chef and his daily routine
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates
August Cook-Off 2017
Real obtuse, From heaven to earth
July Challenge 2018 Division 2
Reach Equilibrium, Magic Set
January Challenge 2019 Division 2
Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Different Neighbours, Yet Another Problem About Sequences, Lucky Number Game
January Cook-Off 2019 Division 2
Ada School, Ada King, Ada Matrix
February Challenge 2019 Division 1
Xor Decomposition, Art of Balance, Chef and Secret Ingredients, Guess It Right, Manhattan Rectangle
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal
April Cook-Off 2019 Division 1
Doubly Increasing Path, Random Game, Pied Piper vs Hooli
India