November Cook-Off 2014
Most Distant Points, Brackets, Petersen Graph, Lost Graph
November Challenge 2014
Chef and Segment Game, Fombinatorial, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome
December Challenge 2014
Chef and Bracket-Pairs, Sereja and GCD, Chef and Apple Trees, XOR with Subset, Chef Under Pressure
August Challenge 2015
Gravity Guy, Cooking Machine
January Long Challenge 2016
Sereja and Salesman, Devu and Perfume, Chef and Time Machine, Rupsa and the Game, Chef and Inflation
April Challenge 2016
Amazing Experiment, Help Watson Escape, Chef and Ballons, Devu and good strings, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and Friends, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, Chef and calculation
Hong Kong (SAR)