*I waited to post this because it is quite long, and, surely to some of you, not as interesting as LJ posts often can be.*
1. Foil:
Valid Surfaces to Hit Shown In Orange:
http://upload.wikimedia.org/wikipedia/commons/9/93/Fencing_foil_valid_surfaces.svgThe weapon is light, originally used in the 17th century for dueling. If I am correct, this is the type of fencing in which the opponents would duel until first blood (very civil, more for humiliations' sake than for any other reason). Only the point (tip) of the foil should be used to hit the opponent. The valid target area is the torso. An off-target touch stops the battle, but no point is scored.
"There are "right of way" conventions or priority rules, whose basic idea is that the first person to create a viable threat or the last person to defend successfully receives a "right" to hit. If two hits arrive more or less simultaneously, only the fencer who had the "right of way" receives a point. If priority cannot be assigned unambiguously, no points are awarded. The basic idea behind the foil rules was, originally, to encourage the defence of one's vital areas, and to fence in a methodical way with initiative passing back and forth between the two fencers and no last-minute counter-attacks ---- which risk a double death.
In modern competitive fencing "electric" weapons are used. These have a push-button on the end, which allows hits to be registered by the electronic scoring apparatus. In order to register, the button must be depressed with a force of at least 4.90 newtons (500 grams-force) for at least 15 milliseconds (Originally 1-5 milliseconds, but changed in 2004, done to counter the popularity of the "flick attack"). Fencers wear conductive (lamé) jackets covering their target area, which allow the scoring apparatus to differentiate between on- and off-target hits.
The 1980s saw the widespread use of "flicks" - hits delivered with a whipping motion which bends the blade around the more traditional parries, and makes it possible to touch otherwise inaccessible areas, such as the back of the opponent. This has been regarded by some fencers as an unacceptable departure from the tradition of realistic combat, where only rigid blades would be used, while others feel that the flick adds to the variety of possible attacks and targets, thereby expanding the game of foil. Ironically, flicks were not entirely an artefact of electronic scoring. Indeed, in 1896, The Lancet published an account of an early "electric scorer" and claimed among its advantages, that "flicks, or blows, or grazes produce no result."[1] Nevertheless, it is the introduction of electronic scoring to high-level competitive foil in the 1950s that is often blamed for the rise in the flick's popularity. In 2004-2005, in an effort to curtail the use of flicks, the FIE raised the contact time required to trigger the scoring apparatus from 1 millisecond to the current 15 milliseconds. This has not made flicks impossible, but it has made them more technically demanding, as glancing hits no longer register, and it is essential that the point arrives more or less square-on. Before they changed the rule, the blade could bend more easily so the back and flanks were easier to hit and score.
Fencers soon discovered new ways to take advantage of, and some would say abuse (needs reference), these changes. Due to the longer point depress time, and the fact that the point will bounce off when it hits a hard surface, it was documented that by wearing a plastic chest protector can often defect a solid hit without registering a touch. In Junior fencing, it has became a common pratice for people to wear such protector. During a competition, it's often seen that a fencer hits his opponent with a great attack and the hit was valid (heard with a loud bang as it hit the protector), but the scoring box doesn't register a touch. It's an unwanted side effect and makes attacking in foil a less attractive action."
2. Épée:
Valid Surfaces to Hit Shown In Red & Orange:
http://upload.wikimedia.org/wikipedia/commons/3/35/Fencing_epee_valid_surfaces.svg"It seems that épée fencing was started at the beginning of the 16th century. After the two-handed broadsword was abandoned and the complete suit of armour was outdated, this new weapon was born in Spain. The rapier épée had a long fine blade with a sharper edge, and the tip could be used to cut and thrust. The guard looked like a small basket drilled with holes, having a long, straight ramrod bored through it to be used in engaging and breaking the opponent's blade and point. With the change from heavy broadsword to lighter épée, swordsmen were obliged to personalize fencing with trickery and artfulness.
Like the foil, the épée is a thrusting weapon: to score a valid hit, the fencer must fix the point of his weapon on his opponent's target. However, épée lacks the foil's most artificial conventions: the restricted target area and the priority rules. In épée, a hit can be scored by landing a hit anywhere on the opponent's body. The fencer whose hit lands first receives the point, irrespective of what happened in the preceding phrase. If two hits arrive simultaneously (within 40 milliseconds of each other), a double hit is recorded, and both fencers get a point (except for in modern pentathlon one-hit épée, where neither fencer receives a point).
In order for the scoring apparatus to register a hit, the push-button on the end of the weapon must remain fully depressed (tip must be depressed for a certain distance) for 2-10 milliseconds. To register, the hit must arrive with a force of at least 7.35 newtons (the equivalent of 750 grams of stationary mass) - a slightly higher threshold than the foil's 4.9 newtons (500 grams). All hits register as valid, unless they land on a grounded metal surface, such as a part of the opponent's weapon, in which case they do not register at all. At large events, grounded conductive pistes are often used in order to prevent the registration of hits against the floor. At smaller events and in club fencing, it is generally the responsibility of the referee to watch out for floor hits. These often happen by accident, when an épéeist tries to hit the opponent's foot and misses. In such cases, they are simply ignored. However, deliberate hits against the floor are treated as "dishonest fencing," and penalized accordingly (see "The Practice of Fencing" below).
In the pre-electric era, épéeists used a point d'arret, a three-pronged point with small protruding spikes, which would snag on the opponent's clothing or mask, helping the referee to see the hits. The spikes caused épée fencing to be a notoriously painful affair, and épéeists could be easily recognized by the tears in their jacket sleeves. These days, the adherents of the point d'arret are few and far between, and non-electric weapons are generally fitted with foil-style rubber buttons.
The épée is the heaviest of the three weapons (approaching the weight of an actual court sword). However, ultra-lightweight blades can actually reduce the weight of an épée to below that of a foil.[2] On low-end weapons, the épée has a relatively stiff blade, though new technology has resulted in a flexible blade comparable to the other weapons. The épée is characterized by a V-shaped or approximately triangular cross-section, and a large round guard which offers much more protection to the wrist than the foil guard.
Épée fencing tends to be more conservative in style than the other weapons, and bouts tend to be somewhat more deliberate."
3. Sabre:
Valid Surfaces to Hit Shown In Red & Orange (though hands are not a valid hit area):
http://upload.wikimedia.org/wikipedia/commons/e/e3/Fencing_saber_valid_surfaces.svg"The sabre is the "cutting" weapon, with a curved guard and a triangular blade. However, in modern electric scoring, a touch with any part of the sabre, point, flat or edge, as long as it is on target, will register a hit.
The modern sabre took its origins and traditions from the cavalry sabre. It is believed that the Hungarians introduced sabre fencing in Europe towards the end of the 18th century. Their sabre, derived from oriental scimitars, had a flat, slightly curved blade and was not as wide and thick as the French cavalry sabre. The Hungarians could not perfect their sabre until they were influenced by the Italian school, which helped them to perfect their teaching.
The target area in sabre is everything from the waist up, except for the hands. A hit that lands off target will not register a light or stop the bout.
Like foil fencing, sabre fencing uses right of way rules. However, the definition of an "attack" is slightly different for the two weapons, and as a result, the right of way rules distinguish sabre and foil, though the basic concepts are the same. Sabre right of way rewards very fast fencing (on offence and defence), and so sabre fencing tends to be more aggressive in style than the other weapons."
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http://en.wikipedia.org/wiki/Fencing