Taking turns coloring cells
Source: CWMI 2017 Q4
August 14, 2017
combinatorics
Problem Statement
Let and be given integers such that . Alice and Bob play a game on an by table with white cells. They take turns to pick a white cell and color it black. Alice moves first. The game ends as soon as there is at least one black cell in every by square after a player moves, who is declared the winner of the game. Who has the winning strategy?