Pin a piece against your opponent's King

Stack two Rooks one behind another in the same file with the Queen at the rear

Deliver checkmate by a Rook or Queen along a back rank, with the King's escape blocked by friendly p

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

Promote a pawn to a Rook, Bishop, or Knight instead of a Queen

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

Win a game in three moves

Win a game in four moves

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

Sacrifice the Queen then go on to win the game

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

Deliver checkmate by two crisscrossing Bishops, with the King's escape blocked by friendly pieces

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