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