September Challenge 2017
Minimum Good Permutation, Chef and Pick Digit, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Penalty Shoot-out, Chef And his Cake
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
April Challenge 2018 Division 2
Weight of Numbers, Highway Crossing, Count Good Prefixes, Workers, Chef and Array (Challenge)
February Challenge 2019 Division 2
Appy and Contest, Deputy Chef, Art of Balance, (Challenge) Chef with Orchestra in the Kitchen, Chef and Secret Ingredients, Chef and Magical Jars
May Lunchtime 2020 Division 2
Weird Walk, Lost Weekends
Starters 64 Division 3 (Rated)
Mario and the Broken String, Luigi and Uniformity, Distinct Colors
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