September Challenge 2014
Chef and Left-Right, Fun with Rotation, Chef and Rainbow Array - 2
June Challenge 2016
Chef And The Hiring Event, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
October Lunchtime 2017
Buggy Calculator, Maximum Number
February Challenge 2020 Division 2
Chef and Railway Stations, No Change Required, The Theatre Problem, School of Geometry, Hard Cash, Long Contest and Cook Off Overlaps
United Kingdom