March Challenge 2017
(CH) Bear and Sorted Rows, Bandwidth of a matrix, Xenny and Alternating Tasks
May Challenge 2017
Chef and his daily routine
August Long Challenge 2017
Chef and Rainbow Array, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Little Chef and Sums
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Three Integers, Magic Elements
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
India