December Challenge 2017
Penalty Shoot-out, Chef And his Cake
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
May Challenge 2018 Division 2
Mighty Friend, Dibs on Fibs, Xor Again, Minimum Deletions
June Challenge 2018 Division 2
Binary Shuffle, Naive Chef
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
Quick Code (Rated for Division 2)
Immortal Frieza, Majin Vegeta
India