October Challenge 2017
A Balanced Contest, Max Mex
November Challenge 2017
Chef goes Left Right Left, Villages and Tribes
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
February Challenge 2018
Points Inside A Polygon, Permutation and Palindrome, Car-pal Tunnel, Chef and odd queries, Chef And The Patents, Chef And His Characters, Broken Clock
May Cook-off 2018 Division 2
Best Cake Ever, Secret Recipe
May Lunchtime 2018 Division 2
Trace of Matrix, Maximum Plus
April Challenge 2018 Division 1
Chef and Array (Challenge), Cutting Plants, Highway Crossing, Chef and Same Old Recurrence, Count Good Prefixes
May Challenge 2018 Division 2
Mighty Friend, Dibs on Fibs, Fake Binary Search, Minimum Deletions, Change the Signs, Xor Again
July Challenge 2018 Division 1
Reach Equilibrium, Chef and War with Taran (Challenge), No Minimum No Maximum, Gears
October Challenge 2018 Division 1
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard, Coprime Components
Encoder (Rated for Division 2)
Knight Chess, Paint the Wall, Old Farmer
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Art of Balance
March Challenge 2019 Division 1
Chef and Soccer, Cheating on Queue, Treasure Hunt, Yet Again a Subarray Problem, (Challenge) Interleaving Strings
India