Milestone Project 1 from Udemy.com - a Tic Tac Toe game for 2 players sharing one keyboard.

One player selects a marker (X/O) then players enter board positions to try and get three markers in a row vertically, horizontally, or diagonally. Positions are as follows:

Top Row: 7 | 8 | 9

Mid Row: 4 | 5 | 6

Bot Row: 1 | 2 | 3