Game Theory Resources Chicago University tutorial - Combinatorial Game Theory Numericana tutorial - Combinatorial Games Codeforces tutorial - Staircase Nim Let Us Code tutorial - Grundy Numbers Codeforces tutorial - Nim and Grundy Shafaetsplanet - Nim Game Tom Davis book - Hackenbush Related Problems LOJ Game Theory Section CF - 1397D - Stoned Game(Medium) UVa - 847 - A multiplication game (Easy)