May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
July Cook-Off 2018 Division 2
Encoding Message, OR Matrix
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
August Challenge 2018 Division 2
Spell Bob, Sheokand and Number, Problem Sort
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Difficult Contests
July Lunchtime 2018 Division 2
Split Stones, Forced Particles
August Lunchtime 2018 Division 2
Chef and Eid, Chef and Problem Setting
September Lunchtime 2018 Division 2
Judging Delay, Chef Restaurant
July Challenge 2020 Division 2
Ada King, Missing a Point, Chef and Card Game, Chef and Strings
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP
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