Question: How many defenders, including the keeper, does a short corner begin with?
About the article "Field hockey", section "Penalty corner".

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The short or penalty corner is awarded: 
 for an offence by a defender in the circle which does not prevent the probable scoring of a goal
 for an intentional offence in the circle by a defender against an opponent who does not have possession of the ball or an opportunity to play the ball
 for an intentional offence by a defender outside the circle but within the 23-metre area they are defending
 for intentionally playing the ball over the back-line by a defender
 when the ball becomes lodged in a player's clothing or equipment while in the circle they are defending
Short corners begin with five defenders (usually including the keeper) positioned behind the back line and at least 5 m from the 'insert' position of the ball.
All other players in the defending team must be beyond the centre line, that is not in their 'own' half of the pitch, until the ball is in play.
Attacking players begin the play standing outside the scoring circle, except for one attacker who starts the corner by playing the ball from a mark 10 m either side of the goal (the circle has a 14.63 m radius).
This player puts the ball into play by pushing or hitting the ball to the other attackers outside the circle; the ball must pass outside the circle and then put back into the circle before the attackers may make a shot at the goal from which a goal can be scored.
FIH rules do not forbid a shot at goal before the ball leaves the circle after being 'inserted', nor is a shot at the goal from outside the circle prohibited, but a goal cannot be scored at all if the ball has not gone out of the circle and cannot be scored from a shot from outside the circle if it is not again played by an attacking player before it enters the goal.
For safety reasons, the first shot of a penalty corner must not exceed 460 mm high (the height of the "backboard" of the goal) at the point it crosses the goal line if it is hit.
However, if the ball is deemed to be below backboard height, the ball can be subsequently deflected above this height by another player (defender or attacker), providing that this deflection does not lead to danger.
Note that the "Slap" stroke (a sweeping motion towards the ball, where the stick is kept on or close to the ground when striking the ball) is classed as a hit, and so the first shot at goal must be below backboard height for this type of shot also.
If the first shot at goal in a short corner situation is a push, flick or scoop, in particular the "drag flick" (which has become popular at international and national league standards), the shot is permitted to rise above the height of the backboard, as long as the shot is not deemed dangerous to any opponent.
This form of shooting was developed because it is not height restricted in the same way as the first hit shot at the goal and players with good technique are able to drag-flick with as much power as many others can hit a ball.
Nobunaga spared the lives of many of the defenders, including Shimozuma Nakayuki, but burned the fortress to the ground.
Three years later, Toyotomi Hideyoshi would begin construction on the same site, building Osaka Castle, a replica of which was constructed in the 20th century. 
The Keeper may refer to:  "The Keeper" (1976 film), starring Christopher Lee  "The Keeper" (1995 film), starring Giancarlo Esposito  "The Keeper" (2002 film), starring Michael Neeley  "The Keeper" (2004 film), starring Asia Argento, Dennis Hopper, Helen Shaver and Lochlyn Munro  "", 2005 film starring Vanessa Redgrave  "The Keeper" (2009 film), starring Steven Seagal  "The Keeper" (2013 film), Produced by New York Film Academy Director: Otabek Djuraev   The Keeper (short story), a 1957 short story by H. Beam Piper  The Keeper, a character in "The Cage", the pilot episode of "Star Trek"  The Keeper, a character in "The Gamekeeper", an episode of "Stargate SG-1"  The Keeper (song), an English folk song associated with hunting.
"The Keeper of Traken", a serial from the classic era of the television programme "Doctor Who"  "The Keepers (song)", the third single from Santigold's second album Master of My Make-Believe  
A common tactic is for several attackers to stand close in front of the goal, whereupon the corner taker crosses the ball for them to head into the goal.
The defending team may choose to form a wall of players in an attempt to force the ball to be played to an area which is more easily defended.
However, this is not done often because defending players must remain at least 10 yards from the ball until it is in play.
The defending team also has the choice of whether to instruct a player to place him or herself beside one or both of the goalposts to provide protection to the goal in addition to the goalkeeper.
The thinking behind placing a player beside a goalpost is that it means more of the goal area is protected and there is no loss in the ability to play an offside trap because offside does not apply for the first touch from a corner, and it compensates for a keeper's positioning and/or reach.
The defending team also has to decide how many players it needs to defend a corner.
Teams may withdraw every player into a defensive area, however this diminishes the potential for a counter-attack if possession is regained, and as such, allows the attacking side to commit more players to attacking the goal.
Withdrawing all players into a defensive area also means that if the ball is cleared from an initial cross, it is more than likely that the attacking team will regain possession of the ball and begin a new attack.
In situations where a set-piece, such as a corner, is awarded to a side trailing by a single goal at the closing stages of a match where conceding further is of minimal consequence (i.e.
in a knockout tournament) a team may commit all their players, including their goalkeeper, to the attack. 
All eleven players on the fielding side take the field together.
One of them is the wicket-keeper "aka" "keeper" who operates behind the wicket being defended by the batsman on strike.
Wicket-keeping is normally a specialist occupation and his primary job is to gather deliveries that the batsman does not hit, so that the batsmen cannot run byes.
He wears special gloves (he is the only fielder allowed to do so), a box over the groin, and pads to cover his lower legs.
Owing to his position directly behind the striker, the wicket-keeper has a good chance of getting a batsman out caught off a fine edge from the bat.
He is the only player who can get a batsman out stumped.
Apart from the one currently bowling, the other nine fielders are tactically deployed by the team captain in chosen positions around the field.
These positions are not fixed but they are known by specific and sometimes colourful names such as "slip", "third man", "silly mid on" and "long leg".
There are always many unprotected areas.
The captain is the most important member of the fielding side as he determines all the tactics including who should bowl (and how); and he is responsible for "setting the field", though usually in consultation with the bowler.
In all forms of cricket, if a fielder gets injured or becomes ill during a match, a substitute is allowed to field instead of him.
The substitute cannot bowl, act as a captain or keep wicket.
The substitute leaves the field when the injured player is fit to return.