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-<H3> 2.1.4 Drops </H3>
-<!--docid::SEC10::-->
-<P>
-
-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.
-</P><P>
-
-There are several restrictions on drops:
-</P><P>
-
-<OL>
-
-<LI>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 <EM>promoted</EM> pawn belonging
-to the same player, however.
-<P>
-
-<LI>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 :-)
-<P>
-
-<LI>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.
-<P>
-
-</OL>
-<P>
-
-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).
-</P><P>
-
-Captured pieces are said to be pieces "in hand".
-</P><P>
-
-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.
-</P><P>
-
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