March Challenge 2018 DIV 2
Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove
September Mega Cook-Off 2018 Division 2
OneTwo, ATM Machine, Make a Permutation
October Mega Cook-Off 2018 Division 2
Ada and the Staircase, Pumping Water, Binary Nim 2
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
June Challenge 2018 Division 2
Naive Chef, Sheokand and String, Vision, Binary Shuffle
July Challenge 2018 Division 1
Reach Equilibrium, No Minimum No Maximum, Magic Set, Strike or Spare
September Challenge 2018 Division 2
Bad Shuffle, Chef and Adventures, War of XORs, Magician versus Chef
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive XOR, Chef and Interactive Contests, Chef and An Ideal Problem
September Lunchtime 2018 Division 2
Judging Delay, Opposite Cites, Chef Restaurant
India