How to solve the Impossible Escape puzzle with almost no math

You and a friend are imprisoned but have a chance for freedom. To earn it, you must walk alone into a separate room where a chess board is laid out with a coin per square randomly showing heads or tails. You are shown a particular square on the chess board, and are then allowed to touch one coin to flip it. Then you must leave without making any contact with your friend. Your friend enters the room and must pick the square which was pointed out to you. You and your friend may discuss a strategy before you enter the room.

This site contains the problem in more detail, along with the solution in mathematical terminology. However, I thought I'd share the way that I thought through this problem using plain English, without the mathematical language.

Click here to show the solution (if you prefer, think it through yourself before clicking)

Posted 2/12/2015