February Challenge 2015
Let us play with rank list, Chef and Equality, Chef and Chain
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
May Challenge 2015
Chef and Prime Divisors, Set Difference , Chef and new recipe
August Challenge 2015
Gravity Guy, Cooking Machine
September Challenge 2015
Count Steps in Matrix, Bank robbery, Chain of Doughnuts
August Cook-Off 2015
Chef and the Wildcard Matching
September Mega Cook-Off 2015
Forgotten Language, Stacks
October Cook-Off 2015
Word Stem, Almost Sorted Permutation
August Lunchtime 2015
Churu and lost string, Minimum Maximum
India