January Challenge 2019 Division 2
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, A Pizza Slice
February Challenge 2019 Division 2
Chef and Magical Jars, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Guess It Right, Manhattan Rectangle
February Lunchtime 2019 Division 2
Average Number, The Tricky Deal
March Challenge 2019 Division 2
Chef and Soccer, (Challenge) Interleaving Strings, Chef and a Beautiful Digit, Yet Again a Subarray Problem, Chef and Number Game, Cheating on Queue, Chef got Recipes
March Cook-Off 2019 Division 1
XOR N-bonacci Sequence, Markers and Caps
May Challenge 2019 Division 1
Ada Rooks 2, Where to Build the Roads
December Challenge 2019 Division 1
Addition, That Is My Score!, (Challenge) Cubical Virus, Binomial Fever, Test Generation, Easy Subsequence Selection, Binary XOR, Plus Multiply, Chefina and Ranges, Sticky Notes
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
April Cook-Off 2020 Division 2
Simple Operations, Matrix Decomposition, Lift Requests
Biteration #2 (Rated for Division 2)
A - Books, B - Candy Love, C - Chef and Maths
July Challenge 2020 Division 2
Missing a Point, Chef and Strings, Chef and Card Game, Doctor Chef, Chef and Dragon Dens, Chefina and Swaps, Ada King
July Cook-Off 2020 Division 1
Even-tual Reduction, OR-thodox Distinction
Coders' Legacy (Rated for all)
Chef vs Doof, Doof on Cartesian, Doof fires Brackets
India