February Challenge 2015
Chef and Chain, Chef and Equality
March Challenge 2015
Chef and Notebooks, Devu and his Class, Sign Wave
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Chef and Cube, Na2a and lucky stone
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
June Cook-Off 2015
Longest non regular parentheses sub-sequence, Strange operations
India