October Mega Cook-Off 2018 Division 2
Ada and the Staircase, Binary Nim 2
November Challenge 2018 Division 2
Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Magician versus Chef 2, Chef and Difficult Contests, Chef and Happiness, Chef and Ridges
October Challenge 2018 Division 2
Appy and Balloons , Minimize Digitsum, Chef and Serves, Byte to Bit
October Lunchtime 2018 Division 2
Three Friends, Coloring the Grid
Encoder (Rated for Division 2)
Knight Chess, Paint the Wall
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Distinct Pairs, (Challenge) Chef and Matching Game, A Pizza Slice
March Challenge 2019 Division 1
Chef and Soccer, Cheating on Queue, Yet Again a Subarray Problem, (Challenge) Interleaving Strings
June Challenge 2019 Division 1
Road Signs, Lent Money, Chef and Ingredients, Intersecting Paths, Sum and GCD, (Challenge) SnackDown 99
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Doofish Set, Chef Designed a Network, (Challenge) Sebi and CPU Design
November Challenge 2019 Division 1
Smallest Beautiful Number, (Challenge) Coloring Triangulations, Single Point of Failure, From Zero to Infinity, Physical Exercise
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English, Chefland Army, (Challenge) Building Anthills
April Cook-Off 2021 Division 1
Tree Distances, OR of ANDs
India