September Challenge 2014
Fun with Rotation, Chef and Left-Right
October Challenge 2014
Chef and Ground, Chef and Painting, DevuLand, Dinosaurs and Laddus
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
November Challenge 2017
Villages and Tribes, Periodic Palindrome Construction, Chef goes Left Right Left
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
October Challenge 2020 Division 2
Positive AND, Chef and Easy Queries, Covid Run
February Challenge 2021 Division 3
Frog Sort, Chef and Meetings, Maximise Function, Highest Divisor
March Challenge 2021 Division 3
Interesting XOR!, Chef and Groups, Space Arrays, No Time to Wait
April Challenge 2021 Division 2
Worthy Matrix, Chef and Dice, Valid Pair, World Record, Strong Language
May Challenge 2021 Division 2 (Rated)
Xor Equality, Tic Tac Toe
United States