Double attacks. It is a double attack, which is done by the player by moving the chess pieces and threatening more than one chess piece.

Pin. Or it can also be called a bond, is a condition when the opponent's chess pieces cannot move by force, because they threaten other chess pieces.

forks. In Indonesian it means fork, which is a fork trick that is done by stepping a chess piece with a horse step, and threatening more than two opposing chess pieces.

Skewer. This means skewers, where the player moves the chess pieces so that they threaten more than one opponent's chess pieces vertically, horizontally, or diagonally.

Discovered attacks. This tactic is a threat to the opponent, which is done by moving a chess piece to the advantage of the chess piece itself and other pieces.

Zugzwang. This condition occurs when players inevitably have to move chess pieces with a certain pattern, even though it ends up being detrimental.

Back rank. Depicts a condition when the king is in the back row and the pawns that protect him are not moved, so they are prone to being killed by the opponent.

Clearance. Or clearing occurs when a player moves a chess piece in preparation for another chess move. This tactic can also be used as an inducement so that certain pieces of the opponent's chess move from their squares.

combination. This combination tactic is done to put the opponent in a dilemma between reacting to the sacrificial move or ignoring it. Both options are not in the opponent's favor.

En passant. That is, moving a pawn two steps forward and there is an opponent's pawn in one tile in the goal row. As a result, the opponent's pawn can catch the new pawn through it, and occupy the tile. This move can only be done after the pawn advances two squares, or when the opponent loses en passant rights.

Promotion. This condition occurs when a pawn moves forward to the last row, the pawn is exchanged for an elephant, rook, horse, or queen.

check. Checkmate occurs when the king is attacked by one or more opposing chess pieces. In this case, the king must be moved to a safe position. Another way is to move other chess pieces in the empty square near the king to keep the king safe from attacks.

Checkmate. That is when the king's position is 'locked', so that every move that will be made, will still endanger yourself. The game is considered over when checkmate has occurred.
mussels. What is meant by draw is a tie condition when both players do not reach checkmate.