December Challenge 2014
Alok-nath and His Sanskars, Chef and Bracket-Pairs, XOR with Subset, Chef and Apple Trees, Chef Under Pressure
January Challenge 2015
Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
February Challenge 2015
Let us play with rank list, Chef and Equality, Chef and Strange Formula, Chef and Chain
March Challenge 2015
Count Substrings, Chef and Notebooks, Sign Wave
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Inversion sorting, Division of Lands, Chef and Piano Scales
June Challenge 2015
Steady tables, Chef and String, Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, MasterChef, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine
September Challenge 2015
Bank robbery, Count Steps in Matrix, Chain of Doughnuts
October Challenge 2015
Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
April Cook-Off 2015
Equality, Version Control System
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