December Challenge 2012
Granama Recipes, Magic Rankings
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Climbing Stairs
March Challenge 2013
Tourist Translations, Approximately, Fire Escape Routes, Minesweeper
March Cook-off 2013
The Ball And Cups, Palindrome
April Challenge 2013
Fault Tolerance, Levy Conjecture, Maximum Weight Difference, Kingdom Unity, Barcelona Gameplay Tactics, Little Elephant and Music
April Cook-Off 2013
Andrew and the Meatballs, Andrew and the Meatballs again
May Challenge 2013
Matchsticks, Witua and Math, Tree Counting, Password Cracking Challenge, Juno Puzzle for May, Name Reduction, Your Name is Mine, Field Trip
December Challenge 2013
Chef and Codes, Funny Marbles, Magic Pairs, Rectangular Queries
August Challenge 2014
The Leaking Robot, Chef and Gift
January Challenge 2015
Gcd Queries, Sereja and Votes, Chef and Stones
August Challenge 2015
Gravity Guy, Cooking Machine
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
September Mega Cook-Off 2015
Forgotten Language, Stacks
August Lunchtime 2015
Churu and lost string, Minimum Maximum
September Lunchtime 2015
Sum of palindromic numbers
February Challenge 2016
Chef and Strange Operations, Chef-Detective
India