July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
September Lunchtime 2015
Sum of palindromic numbers
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
November Challenge 2016
Chef and squares, Task for Alexey
August Cook-Off 2016
Tweedle-Dee and Tweedle-Dum
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
India