The most common game variants of contract bridge are rubber bridge and duplicate bridge ; each has many further variants.

While rubber bridge is played competitively and for stakes, it is most often played socially and with less formality than duplicate bridge.

In duplicate bridge, the cards held by each player in each deal are preserved so that each partnership plays the same set of hands as their East-West or North-South counterparts at other tables and with the scoring based upon relative performance, thus emphasizing skill over chance.

While duplicate is the primary form of higher levels of competitive bridge, it is also played socially.

In duplicate bridge, the hands are shuffled and dealt only once, at the beginning of the session.

If all four players pass in the first round, the deal is not played ; in rubber bridge the deal is not scored and the hand is redealt by the original dealer, while in duplicate the score is recorded as zero for each pair and returned to the board.

* Scoring and tactics in duplicate bridge

* Tournament director in duplicate bridge

When playing the song live Hopwood often used a Rickenbacker guitar with a rag under the bridge to duplicate the sound, which can be seen clearly in old performance clips.

She also was a Senior Life Master duplicate bridge player and died in 2008.

The duplicate bridge was opened in May 2010.

A public open day for the duplicate bridge was held on 16 May and the new bridge was opened to traffic on 22 May 2010, six months ahead of schedule.

** Clockhouse Bridge Club meets on Tuesday and Thursday evenings for duplicate bridge

* Howell is the name of a table movement system often used in duplicate bridge

* Mitchell movement, a type of duplicate bridge table movement

Over half of public opinion had mostly favored a duplicate of the first bridge, while the cable-stayed bridge came in second with around 21 %.

The Blue Water Bridge Authority had rejected both designs, due to the duplicate creating a false sense of history, while the cable-stayed option was feared to overshadow the existing bridge.

* Board ( bridge ), a device used in playing duplicate bridge

In working out the practical legal conclusions President Waters was not thinking only of this pilot project, for it is planned to duplicate this program or system in other builder developments nationally.

The consolidation of duplicate support and development offices was costly and disruptive.

Also included are synonyms, which are now discarded duplicate or incorrect namings, or in the case of the domestic dog synonyms, old taxa referring to subspecies of domestic dog which, when the dog was declared a subspecies itself, had nowhere else to go.

In time, cable television was widely established to carry available Canadian stations as well as import American stations, which constituted the vast majority of signals on systems ( usually only one or two Canadian stations, while some systems had duplicate or even triplicate coverage of American networks ).

It was copied and returned to Thomas, who lost it in a pub in London and required a duplicate to take to America.

Developers create applications that duplicate and extend the interface that was introduced by PathMinder and John Socha's famous Norton Commander for DOS.

In the latter part of his life, Wedgwood's obsession was to duplicate the Portland Vase, a blue and white glass vase dating to the first century BC.

This measurement system confounded early European explorers who tried to duplicate the kayak, because each kayak was a little different.

They discovered that the real Lex Luthor is at large having been the one who mailed Lois the Red Kryptonite necklace and that the one in jail was a robotic duplicate.

The first permanent photoetching was an image produced in 1822 by the French inventor Nicéphore Niépce, but it was destroyed by a later attempt to duplicate it.

The machine, although made in 1886, was a duplicate of one made earlier but taken to Europe by Chichester Bell.

Tons of salted animals and their skins were shipped to Washington ; the quantity was so large that it took years to mount them all, and the Smithsonian shared many duplicate animals with other museums.

A marble duplicate of the sandstone East Front was built from the old Front.

A virtual machine was originally defined by Popek and Goldberg as " an efficient, isolated duplicate of a real machine ".

Unbeknownst to Keen, the Mortimer he had defeated was only an android duplicate.

Created under the supervision of Lavrentiy Beria, who sought to duplicate the American effort, this weapon was nearly identical to Fat Man, for its design was based on information provided by spies Klaus Fuchs, Theodore Hall, and David Greenglass.

Although widely celebrated and increasingly wealthy, he was still restless and insecure in the grip of fears that he would not be able to duplicate his success.

A marker-controlled crossbar system had in the marker a highly vulnerable central control ; this was invariably protected by having duplicate markers.

One was presented as a gift to Virginia Beach, and an exact duplicate was erected in Moss to unite the two sister cities.

This was done with the reluctant help of Geordi LaForge who voiced concerns about how this could cause B-4 to be nothing more than an exact duplicate of Data.

In order to return Jean to the fold several years later, this storyline was retconned to reveal the existence of the cosmic Phoenix Force entity, which had created a duplicate body of Jean, believed itself to be Jean, and acted in her place while the real Jean lay in a coma in the ocean, where the Avengers and Fantastic Four would later discover her.

Robert-Houdin's inventions were pirated by his trusted mechanic Le Grand, who was arrested for making and selling duplicate illusions.

It was begun in 1792 ; and " the whole of the calculations, which to secure greater accuracy were performed in duplicate, and the two manuscripts subsequently collated with care, were completed in the short space of two years.

Some include an option to simply record a tuning that a technician has completed by ear ; the technician can then duplicate that tuning on the same piano ( or others of similar make and model ) more easily and quickly.

Pavel Petrovich Anosov eventually managed to duplicate the qualities of that metal in 1838, when he completed ten years of study into the nature of Damascus steel swords.

With digital switchover completed all services come from Crystal Palace again, but because of the site's importance Croydon will be able to duplicate the PSB multiplexes in case of emergency.

Work was recently completed to duplicate the track between Mitchelton and Keperra, and also to upgrade the intervening stations, Oxford Park and Grovely, to two platforms.

However, Kandinsky had admired the completed design, and Breuer fabricated a duplicate for Kandinsky's personal quarters.

The Gran Kaiser is essentially a duplicate of the original Gran Sigma created by Sandman as a genesis machine, completed and modified for a greater focus on combat.