May Challenge 2017
Chef and Sub Array , Gotham PD, Blocked websites
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
July Challenge 2017
Calculator , Two Coins, IPC Trainers, Whats in the Name, Tree Expectancy, Pishty and tree, Chef and Sign Sequences
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
December Challenge 2017
Total Diamonds, Penalty Shoot-out, Chef And his Cake
April Challenge 2018 Division 2
Average of Pairs, Workers
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
May Challenge 2019 Division 2
Reduce to One, Where to Build the Roads, Matches
May Cook-Off 2019 Division 2
Chain Reaction, Misha and Nice Sets, Recover the Sequence
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD, Forgotten Tree 9
November Challenge 2019 Division 1
Physical Exercise, Single Point of Failure
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