Have two pawns of the same colour on the same file
Castle queenside
Castle kingside
Put an opponent in check
Win a game
Make a capture or exchange
Advance a pawn to the eighth rank
Perform an en passant capture
Deliver a check by two pieces at the same time
Complete all the tutorials
Capture 100 pieces
Deliver checkmate where the King is blocked on both sides by his own Rooks
Place a White Knight on e6
Develop a White King Bishop to b5
Win a tournament
Complete 50% of the chess challenges
Beat an opponent with an Elo rating higher than yours
Create a random online game
Issue an online challenge to a friend
Play a game using the Fischer timer
Using a Knight simultaneously attack the enemy King and Queen
Beat an opponent with an Elo rating more than 75 higher than yours
Win 5 tournaments
Maneuver a pair of Rooks onto your opponent's second rank
Draw a game by stalemate
Win a 32 player tournament
Beat an opponent with an Elo rating more than 150 higher than yours
Beat the computer on Grandmaster difficulty
Complete all the chess challenges
Win 20 tournaments
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