Black has to move their knight to castle and you pick up that piece as a reward for a successful trap. The key move here is the queen to d5 move which attacks the f7 pawn.

This trap is based around the London System opening but and plays into the Scotch Gambit which is slightly differently than the others that start with this opening. This trap is named after Sire de Legal, who was a prominent French chess player in the 18th century. If your opponent chooses to take the queen you get an immediate checkmate. It’s a stellar trap because of the extremely tempting queen sacrifice. This trap is based around playing the London System and is pretty easy to pull off against lower level players. checkout this study to become more familiar with this trap The name of this mate likely originally referred to someone that was still in school rather than a highly educated person that scholar typically means today. The Owen’s Defense trap is a good way to turn this around if this is played against you. It’s one of the fastest mates but is easy to spot and respond to. This is called castling.This is probably the most used trap in chess. Then, immediately move your rook over to the other side of your king.

Kings and rooks: When there are no pieces between your rook and your king on the back row, you can move your king 2 spaces toward your rook.

Most players promote a pawn to a queen because the queen is the most powerful piece. That means you can turn that pawn into any type of piece other than a king.

Pawns: If a pawn makes it all the way to the back row of the other side of the board, it gets promoted.

This special ability is known as en passant (French for 'in passing').

Pawns: If your opponent moves a pawn 2 spaces on its first move so that it's sitting right next to one of your pawns, you can capture it with your pawn on your next move-but only on your next move.

As your play advances and you get more comfortable, you'll find that you use them more and more. These moves aren't anything you really need to worry about during your first few games, but you want to at least know they exist. Take note of the special moves that pawns, rooks, and kings can make. Like the rooks and bishops, the queen has to stop just before one of your own pieces, or capture an opponent's piece and stop there.

Queen: Go as many squares as possible in any direction.

You cannot move the king into any space where one of your opponent's pieces could capture it. Like the rook, they have to stop at the square just before one of your own pieces, or capture an opponent's piece and stop there.

Bishops: Go as many squares as possible diagonally.

Knights are the only pieces that jump over other pieces and only capture an opponent's piece if it's on the final square of the move.

Knights: Move 2 squares horizontally or vertically, then 1 square to the right or left of that second square.

If one of your opponent's pieces is in the way, capture it with your rook and stop there. If one of your pieces is in the way, the rook has to stop at the square just before.

Rooks: Go as many squares as possible horizontally or vertically.

Pawns capture other pieces diagonally, moving one space diagonally forward.

Pawns: Move 1 square forward per turn, except on their first turn, when they can move forward 2 squares.

Each type has its own way of moving across the board and potentially capturing your opponent's pieces as it goes. Each player controls 16 pieces: 8 pawns, 2 bishops, 2 knights (little horse heads), 2 rooks (little castle towers), 1 king, and 1 queen.

Chess for beginners online game