February Challenge 2015
Chef and Equality, Let us play with rank list
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
March Challenge 2016
Palindromic substrings, Chef And Special Dishes, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and digits of a number, Chef and calculation, JosephLand, Faded Palindromes, Chef and Matrix Division, Dividing Machine, Chef and Friends
March Cook-Off 2016
Digital clock, Dual Nim, Alternating subarray prefix
India