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2.1.4 Drops

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- -When a player captures a piece, that piece is not removed from play. -Instead, it becomes the property of the capturer and can re-enter play -by being placed on (almost) any vacant square during the player's move. -This is known as a "drop" and counts as a full move (in other words, -you can either move a piece on the board or drop a piece onto the board -during your move, but not both). All pieces drop in the unpromoted -state. Pieces may be legally dropped in their promotion zone, but they -do not promote on that turn. -

- -There are several restrictions on drops: -

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  1. A pawn may not be dropped onto a file if there is already an -unpromoted pawn belonging to the same player on that file. It is legal -to drop a pawn on a file which contains a promoted pawn belonging -to the same player, however. -

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  2. A pawn may not be dropped to give immediate checkmate on the -move. A pawn is, however, permitted to be moved on the board to give -immediate checkmate. This is a curious rule, and if anyone knows the -reason for it I would appreciate it if they would contact me and explain -it to me :-) -

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  3. A pawn or piece may not be dropped onto a square from which they -would have no legal move. This means that pawns and lances may not be -dropped onto the last rank, and the knight may not be dropped onto the -last or second-to-last rank. -

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- -It is entirely permissible (and often advisable) to drop a piece or pawn -between one's King and an attacking ranging piece. For this reason, -the final checkmating move is nearly always an attack on the King from -an adjacent square (except for an attack by a Knight). -

- -Captured pieces are said to be pieces "in hand". -

- -The drop is the primary distinguishing feature of Japanese chess, shared -with no other popular chess-type game. It gives shogi a very aggressive -quality, and dramatically increases the number of possible moves once a -few pieces have been captured. Another interesting feature of shogi is -that exchanges complicate play rather than simplifying it (as in -international chess), because of the drop rule. -

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