February Challenge 2015
Chef and Chain, Chef and Equality
March Challenge 2015
Chef and Notebooks, Devu and his Class
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
July Challenge 2015
Na2a and lucky stone, Chef and Cube
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Who dares to be a millionaire, Count Subarrays
June Challenge 2017
A Good Set, Xenny and Coin Rankings
October Lunchtime 2018 Division 2
Three Friends, Coloring the Grid
India