When you win the indicated amount of rated games the corresponding chess set will become an available option. Whenever you unlock a new chess set you recieve a confirmation message.
Unlock Neon Chess Set:
Win 15 rated games.
Unlock Classic Old Wood Chess Set:
Win 25 rated games.
Unlock Fancy Metal Chess Set:
Win 30 rated games.
Unlock Indian Glass Chess Set:
Win 35 rated games.
Unlock Modern Chess Set:
Win 45 rated games.
Unlock Steel Chess Set:
Win 50 rated games.
Unlock Calvert Chess Set:
Win 55 rated games.
Unlock Egypt Chess Set:
Win 60 rated games.
