Red eggs (kokkina avga) are a traditional part of the Greek Easter celebration. They are lovingly made, either with onion skins or dye and then baked into a tsoureki (the Easter bread), used as table decorations and are the key piece to a fun game called tsougrisma, which tests the eggs' strength--and perhaps the players' strategy.
The word tsougrisma means "clinking together" or "clashing." In Greek, it is τσούγκρισμα, and is pronounced TSOO-grees-mah. The game requires two players and two red eggs; the goal is to crack the opponent's egg without cracking your own.
How to Play
To play, each player holds a red egg, and one taps the end of her or his egg lightly against the end of the other player's egg. When one egg's end is cracked, the person with the clean egg uses the same end of the egg to try to crack the other end of the opponent's egg.
How to Win
The player who successfully cracks both ends of their opponent's egg is declared the winner and, it is said, will have good luck during the year.
There are no rules about which end of the egg to tap first, how to hold it or how to tap the egg against the other, and there's never been a method that has been proven to work every time!